B1317
Battery voltage too high
Causes
- Faulty alternator voltage regulator (internal or external)
- Stuck regulator diode or failed alternator diodes causing overvoltage
- Open or shorted voltage sense/wiring (battery positive sense to ECU)
- Poor or intermittent ground connections causing incorrect sensing
- Faulty battery or internal cell condition affecting sensing
- Aftermarket battery charger, maintainer or jump-starting while engine running
Symptoms
- Battery/charging system warning lamp or message
- Stored B1317 DTC (may appear intermittently)
- Measured charging voltage above normal (bright headlights, overvoltage readings)
- Blown fuses or electrical component failures if overvoltage is high or prolonged
- Erratic electronics behaviour or instrument cluster warnings
What to check
- Read and record freeze-frame data and all stored DTCs with a suitable scan tool
- Visually inspect battery, battery terminals and main ground connections for corrosion, looseness or damage
- Check for any external chargers/maintainers connected to the battery
- Measure battery voltage with engine off at battery terminals
- Start engine and measure charging voltage at idle and at ~2000 rpm
- Inspect alternator connector, wiring and harness for damage or corrosion
Signal parameters
- Battery voltage (engine off): ~12.4–12.7 V (fully charged)
- Normal charging voltage (engine running): ~13.5–14.8 V
- Typical overvoltage threshold that may set B1317: >15.5–16.0 V (manufacturer-specific)
- AC ripple on alternator output: should be low, typically
- Alternator output current: varies with load — verify against specification for vehicle/engine
Diagnostic algorithm
- Verify code and any freeze-frame data; note conditions when code set (engine speed, load, temperature)
- With engine off, measure battery open-circuit voltage at battery posts; record value
- Start engine and measure charging voltage at battery posts at idle and ~2000 rpm; note voltage with accessories on/off
- If measured voltage is normal, clear codes and perform road test to try to reproduce; re-scan after test
- If overvoltage is present, disconnect any external chargers or maintainers and retest
- Inspect battery positive sense wiring from battery to engine wiring harness and to ECU for shorts to B+ or open circuits; repair as required
- Inspect and test main battery/engine/chassis grounds; clean and tighten connections
- Bench-test or load-test battery to verify condition; replace battery if suspect
- Test alternator output and regulator: check for excessive voltage, check diode bridge (AC ripple), and verify regulator control signals where accessible
- If alternator/regulator fails tests, replace or rebuild alternator with correct OEM-specified unit
- After repairs, clear codes, perform charging system checks under load and drive-cycle; confirm code does not return
- If charging system and wiring test OK but code persists, test the ECU voltage-sense input or consult factory service information for ECU software updates or known issues
Likely causes
- Internal alternator/regulator failure
- Battery positive sense wiring shorted to B+ or open circuit
- Bad battery (internal fault)
- Poor chassis or engine ground at battery or ECU
Fault status
B1317
Battery voltage too high
Causes
- Faulty alternator voltage regulator (internal or external)
- Stuck regulator diode or failed alternator diodes causing overvoltage
- Open or shorted voltage sense/wiring (battery positive sense to ECU)
- Poor or intermittent ground connections causing incorrect sensing
- Faulty battery or internal cell condition affecting sensing
- Aftermarket battery charger, maintainer or jump-starting while engine running
Symptoms
- Battery/charging system warning lamp or message
- Stored B1317 DTC (may appear intermittently)
- Measured charging voltage above normal (bright headlights, overvoltage readings)
- Blown fuses or electrical component failures if overvoltage is high or prolonged
- Erratic electronics behaviour or instrument cluster warnings
What to check
- Read and record freeze-frame data and all stored DTCs with a suitable scan tool
- Visually inspect battery, battery terminals and main ground connections for corrosion, looseness or damage
- Check for any external chargers/maintainers connected to the battery
- Measure battery voltage with engine off at battery terminals
- Start engine and measure charging voltage at idle and at ~2000 rpm
- Inspect alternator connector, wiring and harness for damage or corrosion
Signal parameters
- Battery voltage (engine off): ~12.4–12.7 V (fully charged)
- Normal charging voltage (engine running): ~13.5–14.8 V
- Typical overvoltage threshold that may set B1317: >15.5–16.0 V (manufacturer-specific)
- AC ripple on alternator output: should be low, typically
- Alternator output current: varies with load — verify against specification for vehicle/engine
Diagnostic algorithm
- Verify code and any freeze-frame data; note conditions when code set (engine speed, load, temperature)
- With engine off, measure battery open-circuit voltage at battery posts; record value
- Start engine and measure charging voltage at battery posts at idle and ~2000 rpm; note voltage with accessories on/off
- If measured voltage is normal, clear codes and perform road test to try to reproduce; re-scan after test
- If overvoltage is present, disconnect any external chargers or maintainers and retest
- Inspect battery positive sense wiring from battery to engine wiring harness and to ECU for shorts to B+ or open circuits; repair as required
- Inspect and test main battery/engine/chassis grounds; clean and tighten connections
- Bench-test or load-test battery to verify condition; replace battery if suspect
- Test alternator output and regulator: check for excessive voltage, check diode bridge (AC ripple), and verify regulator control signals where accessible
- If alternator/regulator fails tests, replace or rebuild alternator with correct OEM-specified unit
- After repairs, clear codes, perform charging system checks under load and drive-cycle; confirm code does not return
- If charging system and wiring test OK but code persists, test the ECU voltage-sense input or consult factory service information for ECU software updates or known issues
Likely causes
- Internal alternator/regulator failure
- Battery positive sense wiring shorted to B+ or open circuit
- Bad battery (internal fault)
- Poor chassis or engine ground at battery or ECU
Fault status
Manual library for FIAT
Browse 26 FIAT manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
FIAT
-
FIAT: 2022
-
500X
-
-
FIAT: 2021
-
500X
-
B1317
Battery Voltage High
Causes
- Faulty alternator voltage regulator (internal or external)
- Stuck regulator diode or failed alternator diodes causing overvoltage
- Open or shorted voltage sense/wiring (battery positive sense to ECU)
- Poor or intermittent ground connections causing incorrect sensing
- Faulty battery or internal cell condition affecting sensing
- Aftermarket battery charger, maintainer or jump-starting while engine running
Symptoms
- Battery/charging system warning lamp or message
- Stored B1317 DTC (may appear intermittently)
- Measured charging voltage above normal (bright headlights, overvoltage readings)
- Blown fuses or electrical component failures if overvoltage is high or prolonged
- Erratic electronics behaviour or instrument cluster warnings
What to check
- Read and record freeze-frame data and all stored DTCs with a suitable scan tool
- Visually inspect battery, battery terminals and main ground connections for corrosion, looseness or damage
- Check for any external chargers/maintainers connected to the battery
- Measure battery voltage with engine off at battery terminals
- Start engine and measure charging voltage at idle and at ~2000 rpm
- Inspect alternator connector, wiring and harness for damage or corrosion
Signal parameters
- Battery voltage (engine off): ~12.4–12.7 V (fully charged)
- Normal charging voltage (engine running): ~13.5–14.8 V
- Typical overvoltage threshold that may set B1317: >15.5–16.0 V (manufacturer-specific)
- AC ripple on alternator output: should be low, typically
- Alternator output current: varies with load — verify against specification for vehicle/engine
Diagnostic algorithm
- Verify code and any freeze-frame data; note conditions when code set (engine speed, load, temperature)
- With engine off, measure battery open-circuit voltage at battery posts; record value
- Start engine and measure charging voltage at battery posts at idle and ~2000 rpm; note voltage with accessories on/off
- If measured voltage is normal, clear codes and perform road test to try to reproduce; re-scan after test
- If overvoltage is present, disconnect any external chargers or maintainers and retest
- Inspect battery positive sense wiring from battery to engine wiring harness and to ECU for shorts to B+ or open circuits; repair as required
- Inspect and test main battery/engine/chassis grounds; clean and tighten connections
- Bench-test or load-test battery to verify condition; replace battery if suspect
- Test alternator output and regulator: check for excessive voltage, check diode bridge (AC ripple), and verify regulator control signals where accessible
- If alternator/regulator fails tests, replace or rebuild alternator with correct OEM-specified unit
- After repairs, clear codes, perform charging system checks under load and drive-cycle; confirm code does not return
- If charging system and wiring test OK but code persists, test the ECU voltage-sense input or consult factory service information for ECU software updates or known issues
Likely causes
- Internal alternator/regulator failure
- Battery positive sense wiring shorted to B+ or open circuit
- Bad battery (internal fault)
- Poor chassis or engine ground at battery or ECU
Fault status
Brands with available manuals
The library contains 6,973 repair and diagnostic manuals. Choose a brand to open the full manual tree by year, model and trim.
B1317
In Car Air Temperature Sensor
Causes
- Faulty alternator voltage regulator (internal or external)
- Stuck regulator diode or failed alternator diodes causing overvoltage
- Open or shorted voltage sense/wiring (battery positive sense to ECU)
- Poor or intermittent ground connections causing incorrect sensing
- Faulty battery or internal cell condition affecting sensing
- Aftermarket battery charger, maintainer or jump-starting while engine running
Symptoms
- Battery/charging system warning lamp or message
- Stored B1317 DTC (may appear intermittently)
- Measured charging voltage above normal (bright headlights, overvoltage readings)
- Blown fuses or electrical component failures if overvoltage is high or prolonged
- Erratic electronics behaviour or instrument cluster warnings
What to check
- Read and record freeze-frame data and all stored DTCs with a suitable scan tool
- Visually inspect battery, battery terminals and main ground connections for corrosion, looseness or damage
- Check for any external chargers/maintainers connected to the battery
- Measure battery voltage with engine off at battery terminals
- Start engine and measure charging voltage at idle and at ~2000 rpm
- Inspect alternator connector, wiring and harness for damage or corrosion
Signal parameters
- Battery voltage (engine off): ~12.4–12.7 V (fully charged)
- Normal charging voltage (engine running): ~13.5–14.8 V
- Typical overvoltage threshold that may set B1317: >15.5–16.0 V (manufacturer-specific)
- AC ripple on alternator output: should be low, typically
- Alternator output current: varies with load — verify against specification for vehicle/engine
Diagnostic algorithm
- Verify code and any freeze-frame data; note conditions when code set (engine speed, load, temperature)
- With engine off, measure battery open-circuit voltage at battery posts; record value
- Start engine and measure charging voltage at battery posts at idle and ~2000 rpm; note voltage with accessories on/off
- If measured voltage is normal, clear codes and perform road test to try to reproduce; re-scan after test
- If overvoltage is present, disconnect any external chargers or maintainers and retest
- Inspect battery positive sense wiring from battery to engine wiring harness and to ECU for shorts to B+ or open circuits; repair as required
- Inspect and test main battery/engine/chassis grounds; clean and tighten connections
- Bench-test or load-test battery to verify condition; replace battery if suspect
- Test alternator output and regulator: check for excessive voltage, check diode bridge (AC ripple), and verify regulator control signals where accessible
- If alternator/regulator fails tests, replace or rebuild alternator with correct OEM-specified unit
- After repairs, clear codes, perform charging system checks under load and drive-cycle; confirm code does not return
- If charging system and wiring test OK but code persists, test the ECU voltage-sense input or consult factory service information for ECU software updates or known issues
Likely causes
- Internal alternator/regulator failure
- Battery positive sense wiring shorted to B+ or open circuit
- Bad battery (internal fault)
- Poor chassis or engine ground at battery or ECU
Fault status
Manual library for HUMMER
Browse 138 HUMMER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
HUMMER
-
HUMMER: 2009
-
HUMMER: 2008
-
HUMMER: 2007
-
HUMMER: 2005
-
HUMMER: 2004
-
HUMMER: 2000
-
HUMMER: 1999
-
HUMMER: 1994
-
HUMMER: 1993
B1317
High battery voltage
Causes
- Faulty alternator voltage regulator (internal or external)
- Stuck regulator diode or failed alternator diodes causing overvoltage
- Open or shorted voltage sense/wiring (battery positive sense to ECU)
- Poor or intermittent ground connections causing incorrect sensing
- Faulty battery or internal cell condition affecting sensing
- Aftermarket battery charger, maintainer or jump-starting while engine running
Symptoms
- Battery/charging system warning lamp or message
- Stored B1317 DTC (may appear intermittently)
- Measured charging voltage above normal (bright headlights, overvoltage readings)
- Blown fuses or electrical component failures if overvoltage is high or prolonged
- Erratic electronics behaviour or instrument cluster warnings
What to check
- Read and record freeze-frame data and all stored DTCs with a suitable scan tool
- Visually inspect battery, battery terminals and main ground connections for corrosion, looseness or damage
- Check for any external chargers/maintainers connected to the battery
- Measure battery voltage with engine off at battery terminals
- Start engine and measure charging voltage at idle and at ~2000 rpm
- Inspect alternator connector, wiring and harness for damage or corrosion
Signal parameters
- Battery voltage (engine off): ~12.4–12.7 V (fully charged)
- Normal charging voltage (engine running): ~13.5–14.8 V
- Typical overvoltage threshold that may set B1317: >15.5–16.0 V (manufacturer-specific)
- AC ripple on alternator output: should be low, typically
- Alternator output current: varies with load — verify against specification for vehicle/engine
Diagnostic algorithm
- Verify code and any freeze-frame data; note conditions when code set (engine speed, load, temperature)
- With engine off, measure battery open-circuit voltage at battery posts; record value
- Start engine and measure charging voltage at battery posts at idle and ~2000 rpm; note voltage with accessories on/off
- If measured voltage is normal, clear codes and perform road test to try to reproduce; re-scan after test
- If overvoltage is present, disconnect any external chargers or maintainers and retest
- Inspect battery positive sense wiring from battery to engine wiring harness and to ECU for shorts to B+ or open circuits; repair as required
- Inspect and test main battery/engine/chassis grounds; clean and tighten connections
- Bench-test or load-test battery to verify condition; replace battery if suspect
- Test alternator output and regulator: check for excessive voltage, check diode bridge (AC ripple), and verify regulator control signals where accessible
- If alternator/regulator fails tests, replace or rebuild alternator with correct OEM-specified unit
- After repairs, clear codes, perform charging system checks under load and drive-cycle; confirm code does not return
- If charging system and wiring test OK but code persists, test the ECU voltage-sense input or consult factory service information for ECU software updates or known issues
Likely causes
- Internal alternator/regulator failure
- Battery positive sense wiring shorted to B+ or open circuit
- Bad battery (internal fault)
- Poor chassis or engine ground at battery or ECU
Fault status
Manual library for LAND ROVER
Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
LAND ROVER
-
LAND ROVER: 2022
-
Defender
- 90
- 90
- 90 S
- 90 S
- 90 V8
- 90 V8
- 90 V8 Carpathian Edition
- 90 V8 Carpathian Edition
- 90 X
- 90 X
- 90 X-Dynamic HSE
- 90 X-Dynamic HSE
- 90 X-Dynamic S
- 90 X-Dynamic S
- 90 X-Dynamic SE
- 90 X-Dynamic SE
- 110
- 110
- 110 S
- 110 S
- 110 SE
- 110 SE
- 110 V8
- 110 V8
- 110 V8 Carpathian Edition
- 110 V8 Carpathian Edition
- 110 X
- 110 X
- 110 X-Dynamic SE
- 110 X-Dynamic SE
- 110 XS Edition
- 110 XS Edition
-
Discovery
- R-Dynamic HSE
- R-Dynamic HSE
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Discovery R-Dynamic S
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Discovery R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Discovery R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Discovery R-Dynamic S
- S
- S
-
Discovery Sport
-
Range Rover
- Autobiography, 4.4L Eng VIN 7 · 4.4L Eng VIN 72022: Range Rover Autobiography
- Autobiography, 4.4L Eng VIN 7 · 4.4L Eng VIN 72022: Range Rover Autobiography
- Autobiography, 5.0L Eng VIN E · 5.0L Eng VIN E2022: Range Rover Autobiography
- Autobiography, 5.0L Eng VIN E · 5.0L Eng VIN E2022: Range Rover Autobiography
- 2022 Range Rover Base
- 2022 Range Rover Base
- First Edition
- First Edition
- HSE Westminster, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover HSE Westminster
- HSE Westminster, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover HSE Westminster
- HSE Westminster, 5.0L Eng VIN E · 5.0L Eng VIN E2022: Range Rover HSE Westminster
- HSE Westminster, 5.0L Eng VIN E · 5.0L Eng VIN E2022: Range Rover HSE Westminster
- SE, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover SE
- SE, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover SE
- SE, 4.4L Eng VIN 7 · 4.4L Eng VIN 72022: Range Rover SE
- SE, 4.4L Eng VIN 7 · 4.4L Eng VIN 72022: Range Rover SE
- SV
- SV
- SVAutobiography
- SVAutobiography
- SVAutobiography Dynamic
- SVAutobiography Dynamic
- SVAutobiography Dynamic Blk.
- SVAutobiography Dynamic Blk.
-
Range Rover Evoque
-
Range Rover Velar
- R-Dynamic HSE
- R-Dynamic HSE
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Range Rover Velar R-Dynamic S
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover Velar R-Dynamic S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Range Rover Velar S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Range Rover Velar S
- S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover Velar S
- S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover Velar S
-
-
LAND ROVER: 2021
-
Discovery
- R-Dynamic HSE
- R-Dynamic HSE
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Discovery R-Dynamic S
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Discovery R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Discovery R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Discovery R-Dynamic S
- S
- S
-
Discovery Sport
-
Range Rover
- Autobiography, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Autobiography
- Autobiography, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Autobiography
- Autobiography Fifty Edition
- Autobiography Fifty Edition
- 2021 Range Rover Base
- 2021 Range Rover Base
- HSE, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover HSE
- HSE, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2021: Range Rover HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2021: Range Rover HSE
- HSE Westminster, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover HSE Westminster
- HSE Westminster, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover HSE Westminster
- HSE Westminster, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover HSE Westminster
- HSE Westminster, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover HSE Westminster
- SVAutobiography
- SVAutobiography
- SVAutobiography Dynamic
- SVAutobiography Dynamic
- SVAutobiography Dynamic Blk.
- SVAutobiography Dynamic Blk.
-
Range Rover Evoque
-
Range Rover Sport
- Autobiography, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport Autobiography
- Autobiography, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport Autobiography
- Autobiography, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover Sport Autobiography
- Autobiography, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover Sport Autobiography
- Autobiography Dynamic, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover Sport Autobiography Dynamic
- HSE Dynamic
- HSE Dynamic
- HSE Silver Edition, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport HSE Silver Edition
- HSE Silver Edition, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport HSE Silver Edition
- HSE Silver Edition, 3.0L Eng VIN K · 3.0L Eng VIN K2021: Range Rover Sport HSE Silver Edition
- HSE Silver Edition, 3.0L Eng VIN K · 3.0L Eng VIN K2021: Range Rover Sport HSE Silver Edition
- HSE Silver Edition, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Sport HSE Silver Edition
- HSE Silver Edition, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Sport HSE Silver Edition
- HST
- HST
- SE
- SE
- SVR
- SVR
- SVR Carbon Edition
- SVR Carbon Edition
-
Range Rover Velar
- R-Dynamic HSE
- R-Dynamic HSE
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Range Rover Velar R-Dynamic S
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Velar R-Dynamic S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Range Rover Velar S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Range Rover Velar S
- S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Velar S
- S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Velar S
-
LAND ROVER: 2020
-
Defender
- 90 First Edition
- 90 First Edition
- 110 First Edition
- 110 First Edition
- 110 HSE
- 110 HSE
- 110 S
- 110 S
- 110 SE
- 110 SE
- 110 X
- 110 X
- 110, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Defender 110
- 110, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Defender 110
- 110, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Defender 110
- 110, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Defender 110
-
Discovery
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery HSE
- HSE, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery HSE
- HSE, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery HSE
- HSE Luxury, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery HSE Luxury
- HSE Luxury, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery HSE Luxury
- HSE Luxury, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery HSE Luxury
- HSE Luxury, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery HSE Luxury
- Landmark
- Landmark
- SE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery SE
- SE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery SE
- SE, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery SE
- SE, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery SE
-
Range Rover
- Autobiography
- Autobiography
- Base, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Base
- Base, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Base
- Base, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Base
- Base, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Base
- HSE, 2.0L Eng VIN Y · 2.0L Eng VIN Y2020: Range Rover HSE
- HSE, 2.0L Eng VIN Y · 2.0L Eng VIN Y2020: Range Rover HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover HSE
- HSE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover HSE
- HSE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover HSE
- HSE, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover HSE
- HSE, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover HSE
- SVAutobiography
- SVAutobiography
- SVAutobiography Dynamic
- SVAutobiography Dynamic
-
Range Rover Evoque
-
Range Rover Sport
- Autobiography Dynamic, 2.0L Eng VIN Y · 2.0L Eng VIN Y2020: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 2.0L Eng VIN Y · 2.0L Eng VIN Y2020: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover Sport Autobiography Dynamic
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Sport HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Sport HSE
- HSE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Sport HSE
- HSE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Sport HSE
- HSE, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover Sport HSE
- HSE, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover Sport HSE
- HSE Dynamic
- HSE Dynamic
- HSE PHEV
- HSE PHEV
- HST
- HST
- SE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Sport SE
- SE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Sport SE
- SE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Sport SE
- SE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Sport SE
- SVR
- SVR
-
Range Rover Velar
- R-Dynamic HSE
- R-Dynamic HSE
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Range Rover Velar R-Dynamic S
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Range Rover Velar R-Dynamic S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Range Rover Velar S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Range Rover Velar S
- S, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Range Rover Velar S
- S, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Range Rover Velar S
- SVAutobiography Dyn.
- SVAutobiography Dyn.
-
B1317
Timeout error (5bow down)
Causes
- Faulty alternator voltage regulator (internal or external)
- Stuck regulator diode or failed alternator diodes causing overvoltage
- Open or shorted voltage sense/wiring (battery positive sense to ECU)
- Poor or intermittent ground connections causing incorrect sensing
- Faulty battery or internal cell condition affecting sensing
- Aftermarket battery charger, maintainer or jump-starting while engine running
Symptoms
- Battery/charging system warning lamp or message
- Stored B1317 DTC (may appear intermittently)
- Measured charging voltage above normal (bright headlights, overvoltage readings)
- Blown fuses or electrical component failures if overvoltage is high or prolonged
- Erratic electronics behaviour or instrument cluster warnings
What to check
- Read and record freeze-frame data and all stored DTCs with a suitable scan tool
- Visually inspect battery, battery terminals and main ground connections for corrosion, looseness or damage
- Check for any external chargers/maintainers connected to the battery
- Measure battery voltage with engine off at battery terminals
- Start engine and measure charging voltage at idle and at ~2000 rpm
- Inspect alternator connector, wiring and harness for damage or corrosion
Signal parameters
- Battery voltage (engine off): ~12.4–12.7 V (fully charged)
- Normal charging voltage (engine running): ~13.5–14.8 V
- Typical overvoltage threshold that may set B1317: >15.5–16.0 V (manufacturer-specific)
- AC ripple on alternator output: should be low, typically
- Alternator output current: varies with load — verify against specification for vehicle/engine
Diagnostic algorithm
- Verify code and any freeze-frame data; note conditions when code set (engine speed, load, temperature)
- With engine off, measure battery open-circuit voltage at battery posts; record value
- Start engine and measure charging voltage at battery posts at idle and ~2000 rpm; note voltage with accessories on/off
- If measured voltage is normal, clear codes and perform road test to try to reproduce; re-scan after test
- If overvoltage is present, disconnect any external chargers or maintainers and retest
- Inspect battery positive sense wiring from battery to engine wiring harness and to ECU for shorts to B+ or open circuits; repair as required
- Inspect and test main battery/engine/chassis grounds; clean and tighten connections
- Bench-test or load-test battery to verify condition; replace battery if suspect
- Test alternator output and regulator: check for excessive voltage, check diode bridge (AC ripple), and verify regulator control signals where accessible
- If alternator/regulator fails tests, replace or rebuild alternator with correct OEM-specified unit
- After repairs, clear codes, perform charging system checks under load and drive-cycle; confirm code does not return
- If charging system and wiring test OK but code persists, test the ECU voltage-sense input or consult factory service information for ECU software updates or known issues
Likely causes
- Internal alternator/regulator failure
- Battery positive sense wiring shorted to B+ or open circuit
- Bad battery (internal fault)
- Poor chassis or engine ground at battery or ECU
Fault status
Manual library for MITSUBISHI
Browse 406 MITSUBISHI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
MITSUBISHI
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MITSUBISHI: 2024
-
Outlander
- Black Edition, AWD
- Black Edition, AWD
- Black Edition, FWD
- Black Edition, FWD
- ES, AWD
- ES, AWD
- ES, FWD
- ES, FWD
- Platinum Edition
- Platinum Edition
- SE, AWD
- SE, AWD
- SE, FWD
- SE, FWD
- SEL, AWD
- SEL, AWD
- SEL, FWD
- SEL, FWD
- SEL Black Edition, AWD
- SEL Black Edition, AWD
- SEL Black Edition, FWD
- SEL Black Edition, FWD
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Outlander PHEV
-
MITSUBISHI: 2023
-
Mirage
-
Mirage G4
-
Outlander
- 40th Anniversary
- 40th Anniversary
- Black Edition, AWD
- Black Edition, AWD
- Black Edition, FWD
- Black Edition, FWD
- ES, AWD
- ES, AWD
- ES, FWD
- ES, FWD
- Ralliart
- Ralliart
- SE, AWD
- SE, AWD
- SE, FWD
- SE, FWD
- SEL, AWD
- SEL, AWD
- SEL, FWD
- SEL, FWD
- SEL Black Edition, AWD
- SEL Black Edition, AWD
- SEL Black Edition, FWD
- SEL Black Edition, FWD
- SE Special Edition, AWD
- SE Special Edition, AWD
- SE Special Edition, FWD
- SE Special Edition, FWD
-
Outlander PHEV
-
MITSUBISHI: 2022
-
Eclipse Cross
- ES, AWD
- ES, AWD
- ES, FWD
- ES, FWD
- LE, AWD
- LE, AWD
- LE, FWD
- LE, FWD
- SE, AWD
- SE, AWD
- SE, FWD
- SE, FWD
- SEL, AWD
- SEL, AWD
- SEL, FWD
- SEL, FWD
- SEL Special Edition, AWD
- SEL Special Edition, AWD
- SEL Special Edition, FWD
- SEL Special Edition, FWD
- SE Special Edition, AWD
- SE Special Edition, AWD
- SE Special Edition, FWD
- SE Special Edition, FWD
-
-
MITSUBISHI: 2021
-
MITSUBISHI: 2020
B1317
Battery Voltage High
Causes
- Faulty alternator voltage regulator (internal or external)
- Stuck regulator diode or failed alternator diodes causing overvoltage
- Open or shorted voltage sense/wiring (battery positive sense to ECU)
- Poor or intermittent ground connections causing incorrect sensing
- Faulty battery or internal cell condition affecting sensing
- Aftermarket battery charger, maintainer or jump-starting while engine running
Symptoms
- Battery/charging system warning lamp or message
- Stored B1317 DTC (may appear intermittently)
- Measured charging voltage above normal (bright headlights, overvoltage readings)
- Blown fuses or electrical component failures if overvoltage is high or prolonged
- Erratic electronics behaviour or instrument cluster warnings
What to check
- Read and record freeze-frame data and all stored DTCs with a suitable scan tool
- Visually inspect battery, battery terminals and main ground connections for corrosion, looseness or damage
- Check for any external chargers/maintainers connected to the battery
- Measure battery voltage with engine off at battery terminals
- Start engine and measure charging voltage at idle and at ~2000 rpm
- Inspect alternator connector, wiring and harness for damage or corrosion
Signal parameters
- Battery voltage (engine off): ~12.4–12.7 V (fully charged)
- Normal charging voltage (engine running): ~13.5–14.8 V
- Typical overvoltage threshold that may set B1317: >15.5–16.0 V (manufacturer-specific)
- AC ripple on alternator output: should be low, typically
- Alternator output current: varies with load — verify against specification for vehicle/engine
Diagnostic algorithm
- Verify code and any freeze-frame data; note conditions when code set (engine speed, load, temperature)
- With engine off, measure battery open-circuit voltage at battery posts; record value
- Start engine and measure charging voltage at battery posts at idle and ~2000 rpm; note voltage with accessories on/off
- If measured voltage is normal, clear codes and perform road test to try to reproduce; re-scan after test
- If overvoltage is present, disconnect any external chargers or maintainers and retest
- Inspect battery positive sense wiring from battery to engine wiring harness and to ECU for shorts to B+ or open circuits; repair as required
- Inspect and test main battery/engine/chassis grounds; clean and tighten connections
- Bench-test or load-test battery to verify condition; replace battery if suspect
- Test alternator output and regulator: check for excessive voltage, check diode bridge (AC ripple), and verify regulator control signals where accessible
- If alternator/regulator fails tests, replace or rebuild alternator with correct OEM-specified unit
- After repairs, clear codes, perform charging system checks under load and drive-cycle; confirm code does not return
- If charging system and wiring test OK but code persists, test the ECU voltage-sense input or consult factory service information for ECU software updates or known issues
Likely causes
- Internal alternator/regulator failure
- Battery positive sense wiring shorted to B+ or open circuit
- Bad battery (internal fault)
- Poor chassis or engine ground at battery or ECU
Fault status
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