Code
B1316
ALFA ROMEO
B — Body
Battery saver relay coil circuit short to ground
Views:
UK: 3
EN: 6
RU: 5
AI status
Completed
Completed
100%
Causes
- Damaged or chafed wiring in the relay coil circuit contacting chassis ground
- Corroded or shorted relay socket or connector
- Internal short in the battery saver relay coil
- Shorted driver transistor inside the body control module/BCM/ECU
- Improper aftermarket accessory wiring tapped into the relay circuit
- Water ingress or corrosion at connectors causing grounded circuit
Symptoms
- Battery saver function inoperative (accessories remain on or do not shut off as expected)
- Parasitic battery drain or premature battery discharge
- Battery charge warning or other related instrument cluster message
- Relay will not energize when commanded
- Intermittent electrical behavior or fuse blowing in related circuit
What to check
- Read and record freeze frame / current state when code set (key on/off, engine running, battery voltage)
- Visual inspection of relay, relay socket, and harness for damage, corrosion, or water intrusion
- Check relevant fuses for open or signs of damage
- With ignition off, disconnect the relay and check for continuity between the relay coil terminal and chassis ground
- Measure coil resistance across relay coil pins (bench test) and compare to specification
- Probe the BCM/ECU driver pin for unintended continuity to ground with connector disconnected (service manual pinout)
Signal parameters
- Relay coil nominal voltage (when commanded): ~12 V (key on, command active)
- Relay coil resistance (typical): ~50–200 ohms (varies by relay; consult part spec)
- Expected continuity to ground: high resistance/open (infinite) on coil feed when relay removed and circuit not commanded
- Expected coil current when energized: tens to a few hundred mA depending on coil resistance
- If BCM driver shorted: low resistance (< 5 ohms) to ground on driver output with connector disconnected
Diagnostic algorithm
- Record code and conditions. Clear code and attempt to re-create; note when it returns.
- Perform visual inspection of battery saver relay, holder, and nearby wiring for damage, corrosion, or water entry. Repair as needed.
- Remove battery saver relay. With ignition off, check for continuity between coil supply terminal and chassis ground. Continuity (near 0 Ω) indicates a short to ground in harness, relay, or BCM.
- Bench-test the removed relay: measure coil resistance between coil terminals. Infinite or very high resistance indicates open coil; near zero indicates internal short.
- If relay bench test is good, inspect/measure wiring between relay socket and BCM: disconnect connectors and check resistance to ground and between connector pins to locate shorted section.
- If wiring checks clear, disconnect BCM/ECU connector and check output driver pin for short to ground. If driver pin shows low resistance to ground only when connected at BCM, suspect internal BCM fault.
- Repair the failed component: replace relay and/or repair wiring (repair length of damaged wire, replace connectors). If BCM driver is proven shorted, replace or repair BCM per factory procedures.
- After repairs, clear codes and confirm proper operation over ignition cycles and check for reappearance of the code. Verify battery voltage and absence of parasitic draw.
Likely causes
- Relay socket pin shorted to ground due to corrosion or bent pin
- Wire insulation rubbed through and contacting body/chassis
- Failed relay with internal coil short to its case
- BCM output transistor failed and is shorting to ground
- Accessory or modification connected to relay circuit without proper isolation
Fault status
Status
Battery saver relay coil circuit short to ground detected. Possible shorted relay, damaged wiring, or fault in body control module driver. May cause loss of battery-saving function or battery drain.
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
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Code
B1316
FIAT
B — Body
Battery saver relay coil circuit short to ground
Views:
UK: 3
EN: 7
RU: 5
AI status
Completed
Completed
100%
Causes
- Damaged or chafed wiring in the relay coil circuit contacting chassis ground
- Corroded or shorted relay socket or connector
- Internal short in the battery saver relay coil
- Shorted driver transistor inside the body control module/BCM/ECU
- Improper aftermarket accessory wiring tapped into the relay circuit
- Water ingress or corrosion at connectors causing grounded circuit
Symptoms
- Battery saver function inoperative (accessories remain on or do not shut off as expected)
- Parasitic battery drain or premature battery discharge
- Battery charge warning or other related instrument cluster message
- Relay will not energize when commanded
- Intermittent electrical behavior or fuse blowing in related circuit
What to check
- Read and record freeze frame / current state when code set (key on/off, engine running, battery voltage)
- Visual inspection of relay, relay socket, and harness for damage, corrosion, or water intrusion
- Check relevant fuses for open or signs of damage
- With ignition off, disconnect the relay and check for continuity between the relay coil terminal and chassis ground
- Measure coil resistance across relay coil pins (bench test) and compare to specification
- Probe the BCM/ECU driver pin for unintended continuity to ground with connector disconnected (service manual pinout)
Signal parameters
- Relay coil nominal voltage (when commanded): ~12 V (key on, command active)
- Relay coil resistance (typical): ~50–200 ohms (varies by relay; consult part spec)
- Expected continuity to ground: high resistance/open (infinite) on coil feed when relay removed and circuit not commanded
- Expected coil current when energized: tens to a few hundred mA depending on coil resistance
- If BCM driver shorted: low resistance (< 5 ohms) to ground on driver output with connector disconnected
Diagnostic algorithm
- Record code and conditions. Clear code and attempt to re-create; note when it returns.
- Perform visual inspection of battery saver relay, holder, and nearby wiring for damage, corrosion, or water entry. Repair as needed.
- Remove battery saver relay. With ignition off, check for continuity between coil supply terminal and chassis ground. Continuity (near 0 Ω) indicates a short to ground in harness, relay, or BCM.
- Bench-test the removed relay: measure coil resistance between coil terminals. Infinite or very high resistance indicates open coil; near zero indicates internal short.
- If relay bench test is good, inspect/measure wiring between relay socket and BCM: disconnect connectors and check resistance to ground and between connector pins to locate shorted section.
- If wiring checks clear, disconnect BCM/ECU connector and check output driver pin for short to ground. If driver pin shows low resistance to ground only when connected at BCM, suspect internal BCM fault.
- Repair the failed component: replace relay and/or repair wiring (repair length of damaged wire, replace connectors). If BCM driver is proven shorted, replace or repair BCM per factory procedures.
- After repairs, clear codes and confirm proper operation over ignition cycles and check for reappearance of the code. Verify battery voltage and absence of parasitic draw.
Likely causes
- Relay socket pin shorted to ground due to corrosion or bent pin
- Wire insulation rubbed through and contacting body/chassis
- Failed relay with internal coil short to its case
- BCM output transistor failed and is shorting to ground
- Accessory or modification connected to relay circuit without proper isolation
Fault status
Status
Battery saver relay coil circuit short to ground detected. Possible shorted relay, damaged wiring, or fault in body control module driver. May cause loss of battery-saving function or battery drain.
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
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Code
B1316
HUMMER
B — Body
In Car Temperature Sensor Open Circuit
Views:
UK: 5
EN: 13
RU: 9
AI status
Completed
Completed
100%
Causes
- Damaged or chafed wiring in the relay coil circuit contacting chassis ground
- Corroded or shorted relay socket or connector
- Internal short in the battery saver relay coil
- Shorted driver transistor inside the body control module/BCM/ECU
- Improper aftermarket accessory wiring tapped into the relay circuit
- Water ingress or corrosion at connectors causing grounded circuit
Symptoms
- Battery saver function inoperative (accessories remain on or do not shut off as expected)
- Parasitic battery drain or premature battery discharge
- Battery charge warning or other related instrument cluster message
- Relay will not energize when commanded
- Intermittent electrical behavior or fuse blowing in related circuit
What to check
- Read and record freeze frame / current state when code set (key on/off, engine running, battery voltage)
- Visual inspection of relay, relay socket, and harness for damage, corrosion, or water intrusion
- Check relevant fuses for open or signs of damage
- With ignition off, disconnect the relay and check for continuity between the relay coil terminal and chassis ground
- Measure coil resistance across relay coil pins (bench test) and compare to specification
- Probe the BCM/ECU driver pin for unintended continuity to ground with connector disconnected (service manual pinout)
Signal parameters
- Relay coil nominal voltage (when commanded): ~12 V (key on, command active)
- Relay coil resistance (typical): ~50–200 ohms (varies by relay; consult part spec)
- Expected continuity to ground: high resistance/open (infinite) on coil feed when relay removed and circuit not commanded
- Expected coil current when energized: tens to a few hundred mA depending on coil resistance
- If BCM driver shorted: low resistance (< 5 ohms) to ground on driver output with connector disconnected
Diagnostic algorithm
- Record code and conditions. Clear code and attempt to re-create; note when it returns.
- Perform visual inspection of battery saver relay, holder, and nearby wiring for damage, corrosion, or water entry. Repair as needed.
- Remove battery saver relay. With ignition off, check for continuity between coil supply terminal and chassis ground. Continuity (near 0 Ω) indicates a short to ground in harness, relay, or BCM.
- Bench-test the removed relay: measure coil resistance between coil terminals. Infinite or very high resistance indicates open coil; near zero indicates internal short.
- If relay bench test is good, inspect/measure wiring between relay socket and BCM: disconnect connectors and check resistance to ground and between connector pins to locate shorted section.
- If wiring checks clear, disconnect BCM/ECU connector and check output driver pin for short to ground. If driver pin shows low resistance to ground only when connected at BCM, suspect internal BCM fault.
- Repair the failed component: replace relay and/or repair wiring (repair length of damaged wire, replace connectors). If BCM driver is proven shorted, replace or repair BCM per factory procedures.
- After repairs, clear codes and confirm proper operation over ignition cycles and check for reappearance of the code. Verify battery voltage and absence of parasitic draw.
Likely causes
- Relay socket pin shorted to ground due to corrosion or bent pin
- Wire insulation rubbed through and contacting body/chassis
- Failed relay with internal coil short to its case
- BCM output transistor failed and is shorting to ground
- Accessory or modification connected to relay circuit without proper isolation
Fault status
Status
Battery saver relay coil circuit short to ground detected. Possible shorted relay, damaged wiring, or fault in body control module driver. May cause loss of battery-saving function or battery drain.
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
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Code
B1316
LAND ROVER
B — Body
Start-up lock closing unit / trunk
Views:
UK: 6
EN: 11
RU: 8
AI status
Completed
Completed
100%
Causes
- Damaged or chafed wiring in the relay coil circuit contacting chassis ground
- Corroded or shorted relay socket or connector
- Internal short in the battery saver relay coil
- Shorted driver transistor inside the body control module/BCM/ECU
- Improper aftermarket accessory wiring tapped into the relay circuit
- Water ingress or corrosion at connectors causing grounded circuit
Symptoms
- Battery saver function inoperative (accessories remain on or do not shut off as expected)
- Parasitic battery drain or premature battery discharge
- Battery charge warning or other related instrument cluster message
- Relay will not energize when commanded
- Intermittent electrical behavior or fuse blowing in related circuit
What to check
- Read and record freeze frame / current state when code set (key on/off, engine running, battery voltage)
- Visual inspection of relay, relay socket, and harness for damage, corrosion, or water intrusion
- Check relevant fuses for open or signs of damage
- With ignition off, disconnect the relay and check for continuity between the relay coil terminal and chassis ground
- Measure coil resistance across relay coil pins (bench test) and compare to specification
- Probe the BCM/ECU driver pin for unintended continuity to ground with connector disconnected (service manual pinout)
Signal parameters
- Relay coil nominal voltage (when commanded): ~12 V (key on, command active)
- Relay coil resistance (typical): ~50–200 ohms (varies by relay; consult part spec)
- Expected continuity to ground: high resistance/open (infinite) on coil feed when relay removed and circuit not commanded
- Expected coil current when energized: tens to a few hundred mA depending on coil resistance
- If BCM driver shorted: low resistance (< 5 ohms) to ground on driver output with connector disconnected
Diagnostic algorithm
- Record code and conditions. Clear code and attempt to re-create; note when it returns.
- Perform visual inspection of battery saver relay, holder, and nearby wiring for damage, corrosion, or water entry. Repair as needed.
- Remove battery saver relay. With ignition off, check for continuity between coil supply terminal and chassis ground. Continuity (near 0 Ω) indicates a short to ground in harness, relay, or BCM.
- Bench-test the removed relay: measure coil resistance between coil terminals. Infinite or very high resistance indicates open coil; near zero indicates internal short.
- If relay bench test is good, inspect/measure wiring between relay socket and BCM: disconnect connectors and check resistance to ground and between connector pins to locate shorted section.
- If wiring checks clear, disconnect BCM/ECU connector and check output driver pin for short to ground. If driver pin shows low resistance to ground only when connected at BCM, suspect internal BCM fault.
- Repair the failed component: replace relay and/or repair wiring (repair length of damaged wire, replace connectors). If BCM driver is proven shorted, replace or repair BCM per factory procedures.
- After repairs, clear codes and confirm proper operation over ignition cycles and check for reappearance of the code. Verify battery voltage and absence of parasitic draw.
Likely causes
- Relay socket pin shorted to ground due to corrosion or bent pin
- Wire insulation rubbed through and contacting body/chassis
- Failed relay with internal coil short to its case
- BCM output transistor failed and is shorting to ground
- Accessory or modification connected to relay circuit without proper isolation
Fault status
Status
Battery saver relay coil circuit short to ground detected. Possible shorted relay, damaged wiring, or fault in body control module driver. May cause loss of battery-saving function or battery drain.
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
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Code
B1316
MITSUBISHI
B — Body
Timeout error (Topstack up)
Views:
UK: 7
EN: 12
RU: 9
AI status
Completed
Completed
100%
Causes
- Damaged or chafed wiring in the relay coil circuit contacting chassis ground
- Corroded or shorted relay socket or connector
- Internal short in the battery saver relay coil
- Shorted driver transistor inside the body control module/BCM/ECU
- Improper aftermarket accessory wiring tapped into the relay circuit
- Water ingress or corrosion at connectors causing grounded circuit
Symptoms
- Battery saver function inoperative (accessories remain on or do not shut off as expected)
- Parasitic battery drain or premature battery discharge
- Battery charge warning or other related instrument cluster message
- Relay will not energize when commanded
- Intermittent electrical behavior or fuse blowing in related circuit
What to check
- Read and record freeze frame / current state when code set (key on/off, engine running, battery voltage)
- Visual inspection of relay, relay socket, and harness for damage, corrosion, or water intrusion
- Check relevant fuses for open or signs of damage
- With ignition off, disconnect the relay and check for continuity between the relay coil terminal and chassis ground
- Measure coil resistance across relay coil pins (bench test) and compare to specification
- Probe the BCM/ECU driver pin for unintended continuity to ground with connector disconnected (service manual pinout)
Signal parameters
- Relay coil nominal voltage (when commanded): ~12 V (key on, command active)
- Relay coil resistance (typical): ~50–200 ohms (varies by relay; consult part spec)
- Expected continuity to ground: high resistance/open (infinite) on coil feed when relay removed and circuit not commanded
- Expected coil current when energized: tens to a few hundred mA depending on coil resistance
- If BCM driver shorted: low resistance (< 5 ohms) to ground on driver output with connector disconnected
Diagnostic algorithm
- Record code and conditions. Clear code and attempt to re-create; note when it returns.
- Perform visual inspection of battery saver relay, holder, and nearby wiring for damage, corrosion, or water entry. Repair as needed.
- Remove battery saver relay. With ignition off, check for continuity between coil supply terminal and chassis ground. Continuity (near 0 Ω) indicates a short to ground in harness, relay, or BCM.
- Bench-test the removed relay: measure coil resistance between coil terminals. Infinite or very high resistance indicates open coil; near zero indicates internal short.
- If relay bench test is good, inspect/measure wiring between relay socket and BCM: disconnect connectors and check resistance to ground and between connector pins to locate shorted section.
- If wiring checks clear, disconnect BCM/ECU connector and check output driver pin for short to ground. If driver pin shows low resistance to ground only when connected at BCM, suspect internal BCM fault.
- Repair the failed component: replace relay and/or repair wiring (repair length of damaged wire, replace connectors). If BCM driver is proven shorted, replace or repair BCM per factory procedures.
- After repairs, clear codes and confirm proper operation over ignition cycles and check for reappearance of the code. Verify battery voltage and absence of parasitic draw.
Likely causes
- Relay socket pin shorted to ground due to corrosion or bent pin
- Wire insulation rubbed through and contacting body/chassis
- Failed relay with internal coil short to its case
- BCM output transistor failed and is shorting to ground
- Accessory or modification connected to relay circuit without proper isolation
Fault status
Status
Battery saver relay coil circuit short to ground detected. Possible shorted relay, damaged wiring, or fault in body control module driver. May cause loss of battery-saving function or battery drain.
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
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Code
B1316
Other
B — Body
Battery Saver Relay Coil Circuit Short To Ground
Views:
UK: 17
EN: 32
RU: 26
AI status
Completed
Completed
100%
Causes
- Damaged or chafed wiring in the relay coil circuit contacting chassis ground
- Corroded or shorted relay socket or connector
- Internal short in the battery saver relay coil
- Shorted driver transistor inside the body control module/BCM/ECU
- Improper aftermarket accessory wiring tapped into the relay circuit
- Water ingress or corrosion at connectors causing grounded circuit
Symptoms
- Battery saver function inoperative (accessories remain on or do not shut off as expected)
- Parasitic battery drain or premature battery discharge
- Battery charge warning or other related instrument cluster message
- Relay will not energize when commanded
- Intermittent electrical behavior or fuse blowing in related circuit
What to check
- Read and record freeze frame / current state when code set (key on/off, engine running, battery voltage)
- Visual inspection of relay, relay socket, and harness for damage, corrosion, or water intrusion
- Check relevant fuses for open or signs of damage
- With ignition off, disconnect the relay and check for continuity between the relay coil terminal and chassis ground
- Measure coil resistance across relay coil pins (bench test) and compare to specification
- Probe the BCM/ECU driver pin for unintended continuity to ground with connector disconnected (service manual pinout)
Signal parameters
- Relay coil nominal voltage (when commanded): ~12 V (key on, command active)
- Relay coil resistance (typical): ~50–200 ohms (varies by relay; consult part spec)
- Expected continuity to ground: high resistance/open (infinite) on coil feed when relay removed and circuit not commanded
- Expected coil current when energized: tens to a few hundred mA depending on coil resistance
- If BCM driver shorted: low resistance (< 5 ohms) to ground on driver output with connector disconnected
Diagnostic algorithm
- Record code and conditions. Clear code and attempt to re-create; note when it returns.
- Perform visual inspection of battery saver relay, holder, and nearby wiring for damage, corrosion, or water entry. Repair as needed.
- Remove battery saver relay. With ignition off, check for continuity between coil supply terminal and chassis ground. Continuity (near 0 Ω) indicates a short to ground in harness, relay, or BCM.
- Bench-test the removed relay: measure coil resistance between coil terminals. Infinite or very high resistance indicates open coil; near zero indicates internal short.
- If relay bench test is good, inspect/measure wiring between relay socket and BCM: disconnect connectors and check resistance to ground and between connector pins to locate shorted section.
- If wiring checks clear, disconnect BCM/ECU connector and check output driver pin for short to ground. If driver pin shows low resistance to ground only when connected at BCM, suspect internal BCM fault.
- Repair the failed component: replace relay and/or repair wiring (repair length of damaged wire, replace connectors). If BCM driver is proven shorted, replace or repair BCM per factory procedures.
- After repairs, clear codes and confirm proper operation over ignition cycles and check for reappearance of the code. Verify battery voltage and absence of parasitic draw.
Likely causes
- Relay socket pin shorted to ground due to corrosion or bent pin
- Wire insulation rubbed through and contacting body/chassis
- Failed relay with internal coil short to its case
- BCM output transistor failed and is shorting to ground
- Accessory or modification connected to relay circuit without proper isolation
Fault status
Status
Battery saver relay coil circuit short to ground detected. Possible shorted relay, damaged wiring, or fault in body control module driver. May cause loss of battery-saving function or battery drain.
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
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Send to email