Code
B1314
ALFA ROMEO
B — Body
Battery saver relay coil circuit open
Views:
UK: 4
EN: 6
RU: 2
AI status
Completed
Completed
100%
Causes
- Open or damaged wiring between BCM/body control module and battery saver relay coil
- Corroded, loose or disconnected relay connector or terminals
- Faulty battery saver relay (open coil)
- Blown fuse or fusible link protecting the relay coil circuit
- Faulty BCM/body control module driver (open control transistor)
- Poor ground at relay coil or related grounds
Symptoms
- Battery saver feature does not engage (accessories remain powered)
- Parasitic battery drain or premature battery discharge
- Accessories not switching off automatically with ignition off
- Possible interior lighting or convenience features staying on
- Possible related warning messages or stored body module errors
What to check
- Read stored codes and freeze frame with scan tool; confirm B1314 is current or historic
- Perform visual inspection of relay, harness, connector and related fuses for damage or corrosion
- Verify vehicle battery voltage is healthy (12.4–12.8V at rest)
- Check fuse and any inline fuse link for continuity
- With ignition in the state that should command battery saver, use scan tool to actuate battery saver relay (if available) and listen/observe for relay click
- Probe relay coil terminals for voltage while commanding relay from scan tool or turning ignition to the state that should energize coil
Signal parameters
- Relay coil voltage when commanded: approximately battery voltage (11–14.5 V) at coil supply terminal
- Relay coil voltage when not commanded: ~0 V at control/driver terminal (may see pull-down or low voltage)
- Relay coil resistance (typical): 50–200 ohms (manufacturer-specific; compare to known-good relay)
- Continuity: supply fuse to relay coil terminal should show near 0 ohms (
- Ground continuity: relay coil ground to battery negative: near 0 ohms (
Diagnostic algorithm
- Safety first: ensure vehicle is parked, ignition off, and battery stable; use PPE and follow manufacturer procedures.
- Retrieve freeze frame and confirm B1314 is present; clear code and attempt to re-create to verify active condition.
- Visually inspect relay, socket, harness, and all visible wiring for damage, corrosion, loose pins or water ingress. Repair as needed.
- Check relevant fuses and fusible links for continuity; replace any blown fuses.
- With relay in place, backprobe relay coil supply and coil control pins. Command the battery saver function from a scan tool or switch to the state that should energize the relay and observe coil supply and control voltages. Expect battery voltage on supply and battery or near 0 V on control depending on driver type.
- If no coil supply, trace and repair open circuit from fuse/power source to relay. If coil supply present but no control drive, test continuity between BCM control pin and relay connector; inspect connector and wiring for opens.
- Remove relay and measure coil resistance on bench. If coil is open (infinite resistance), replace relay. If resistance is within spec, reinstall and re-test.
- If wiring and relay are good but no control signal from BCM, check BCM driver output with oscilloscope or multimeter and verify ground references. If BCM output is missing or stuck, consider BCM software update or replacement per manufacturer guidance.
- After repairs, clear codes, operate vehicle through relevant cycles, and verify code does not return and battery saver function operates normally.
Likely causes
- Broken or pinched conductor in harness to relay coil
- Corroded relay socket terminals or water ingress
- Battery saver relay coil internally open
- Blown in-line fuse supplying relay coil
- Connector not fully seated after service
Fault status
Status
Battery saver relay coil circuit open — circuit continuity or control drive to relay coil not detected.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
B1314
FIAT
B — Body
Battery saver relay coil circuit open
Views:
UK: 6
EN: 6
RU: 2
AI status
Completed
Completed
100%
Causes
- Open or damaged wiring between BCM/body control module and battery saver relay coil
- Corroded, loose or disconnected relay connector or terminals
- Faulty battery saver relay (open coil)
- Blown fuse or fusible link protecting the relay coil circuit
- Faulty BCM/body control module driver (open control transistor)
- Poor ground at relay coil or related grounds
Symptoms
- Battery saver feature does not engage (accessories remain powered)
- Parasitic battery drain or premature battery discharge
- Accessories not switching off automatically with ignition off
- Possible interior lighting or convenience features staying on
- Possible related warning messages or stored body module errors
What to check
- Read stored codes and freeze frame with scan tool; confirm B1314 is current or historic
- Perform visual inspection of relay, harness, connector and related fuses for damage or corrosion
- Verify vehicle battery voltage is healthy (12.4–12.8V at rest)
- Check fuse and any inline fuse link for continuity
- With ignition in the state that should command battery saver, use scan tool to actuate battery saver relay (if available) and listen/observe for relay click
- Probe relay coil terminals for voltage while commanding relay from scan tool or turning ignition to the state that should energize coil
Signal parameters
- Relay coil voltage when commanded: approximately battery voltage (11–14.5 V) at coil supply terminal
- Relay coil voltage when not commanded: ~0 V at control/driver terminal (may see pull-down or low voltage)
- Relay coil resistance (typical): 50–200 ohms (manufacturer-specific; compare to known-good relay)
- Continuity: supply fuse to relay coil terminal should show near 0 ohms (
- Ground continuity: relay coil ground to battery negative: near 0 ohms (
Diagnostic algorithm
- Safety first: ensure vehicle is parked, ignition off, and battery stable; use PPE and follow manufacturer procedures.
- Retrieve freeze frame and confirm B1314 is present; clear code and attempt to re-create to verify active condition.
- Visually inspect relay, socket, harness, and all visible wiring for damage, corrosion, loose pins or water ingress. Repair as needed.
- Check relevant fuses and fusible links for continuity; replace any blown fuses.
- With relay in place, backprobe relay coil supply and coil control pins. Command the battery saver function from a scan tool or switch to the state that should energize the relay and observe coil supply and control voltages. Expect battery voltage on supply and battery or near 0 V on control depending on driver type.
- If no coil supply, trace and repair open circuit from fuse/power source to relay. If coil supply present but no control drive, test continuity between BCM control pin and relay connector; inspect connector and wiring for opens.
- Remove relay and measure coil resistance on bench. If coil is open (infinite resistance), replace relay. If resistance is within spec, reinstall and re-test.
- If wiring and relay are good but no control signal from BCM, check BCM driver output with oscilloscope or multimeter and verify ground references. If BCM output is missing or stuck, consider BCM software update or replacement per manufacturer guidance.
- After repairs, clear codes, operate vehicle through relevant cycles, and verify code does not return and battery saver function operates normally.
Likely causes
- Broken or pinched conductor in harness to relay coil
- Corroded relay socket terminals or water ingress
- Battery saver relay coil internally open
- Blown in-line fuse supplying relay coil
- Connector not fully seated after service
Fault status
Status
Battery saver relay coil circuit open — circuit continuity or control drive to relay coil not detected.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
B1314
HUMMER
B — Body
Evaporator Inlet Temp Sensor Open Circuit
Views:
UK: 5
EN: 13
RU: 3
AI status
Completed
Completed
100%
Causes
- Open or damaged wiring between BCM/body control module and battery saver relay coil
- Corroded, loose or disconnected relay connector or terminals
- Faulty battery saver relay (open coil)
- Blown fuse or fusible link protecting the relay coil circuit
- Faulty BCM/body control module driver (open control transistor)
- Poor ground at relay coil or related grounds
Symptoms
- Battery saver feature does not engage (accessories remain powered)
- Parasitic battery drain or premature battery discharge
- Accessories not switching off automatically with ignition off
- Possible interior lighting or convenience features staying on
- Possible related warning messages or stored body module errors
What to check
- Read stored codes and freeze frame with scan tool; confirm B1314 is current or historic
- Perform visual inspection of relay, harness, connector and related fuses for damage or corrosion
- Verify vehicle battery voltage is healthy (12.4–12.8V at rest)
- Check fuse and any inline fuse link for continuity
- With ignition in the state that should command battery saver, use scan tool to actuate battery saver relay (if available) and listen/observe for relay click
- Probe relay coil terminals for voltage while commanding relay from scan tool or turning ignition to the state that should energize coil
Signal parameters
- Relay coil voltage when commanded: approximately battery voltage (11–14.5 V) at coil supply terminal
- Relay coil voltage when not commanded: ~0 V at control/driver terminal (may see pull-down or low voltage)
- Relay coil resistance (typical): 50–200 ohms (manufacturer-specific; compare to known-good relay)
- Continuity: supply fuse to relay coil terminal should show near 0 ohms (
- Ground continuity: relay coil ground to battery negative: near 0 ohms (
Diagnostic algorithm
- Safety first: ensure vehicle is parked, ignition off, and battery stable; use PPE and follow manufacturer procedures.
- Retrieve freeze frame and confirm B1314 is present; clear code and attempt to re-create to verify active condition.
- Visually inspect relay, socket, harness, and all visible wiring for damage, corrosion, loose pins or water ingress. Repair as needed.
- Check relevant fuses and fusible links for continuity; replace any blown fuses.
- With relay in place, backprobe relay coil supply and coil control pins. Command the battery saver function from a scan tool or switch to the state that should energize the relay and observe coil supply and control voltages. Expect battery voltage on supply and battery or near 0 V on control depending on driver type.
- If no coil supply, trace and repair open circuit from fuse/power source to relay. If coil supply present but no control drive, test continuity between BCM control pin and relay connector; inspect connector and wiring for opens.
- Remove relay and measure coil resistance on bench. If coil is open (infinite resistance), replace relay. If resistance is within spec, reinstall and re-test.
- If wiring and relay are good but no control signal from BCM, check BCM driver output with oscilloscope or multimeter and verify ground references. If BCM output is missing or stuck, consider BCM software update or replacement per manufacturer guidance.
- After repairs, clear codes, operate vehicle through relevant cycles, and verify code does not return and battery saver function operates normally.
Likely causes
- Broken or pinched conductor in harness to relay coil
- Corroded relay socket terminals or water ingress
- Battery saver relay coil internally open
- Blown in-line fuse supplying relay coil
- Connector not fully seated after service
Fault status
Status
Battery saver relay coil circuit open — circuit continuity or control drive to relay coil not detected.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
B1314
LAND ROVER
B — Body
Battery saving relay coil - open circuit
Views:
UK: 7
EN: 9
RU: 3
AI status
Completed
Completed
100%
Causes
- Open or damaged wiring between BCM/body control module and battery saver relay coil
- Corroded, loose or disconnected relay connector or terminals
- Faulty battery saver relay (open coil)
- Blown fuse or fusible link protecting the relay coil circuit
- Faulty BCM/body control module driver (open control transistor)
- Poor ground at relay coil or related grounds
Symptoms
- Battery saver feature does not engage (accessories remain powered)
- Parasitic battery drain or premature battery discharge
- Accessories not switching off automatically with ignition off
- Possible interior lighting or convenience features staying on
- Possible related warning messages or stored body module errors
What to check
- Read stored codes and freeze frame with scan tool; confirm B1314 is current or historic
- Perform visual inspection of relay, harness, connector and related fuses for damage or corrosion
- Verify vehicle battery voltage is healthy (12.4–12.8V at rest)
- Check fuse and any inline fuse link for continuity
- With ignition in the state that should command battery saver, use scan tool to actuate battery saver relay (if available) and listen/observe for relay click
- Probe relay coil terminals for voltage while commanding relay from scan tool or turning ignition to the state that should energize coil
Signal parameters
- Relay coil voltage when commanded: approximately battery voltage (11–14.5 V) at coil supply terminal
- Relay coil voltage when not commanded: ~0 V at control/driver terminal (may see pull-down or low voltage)
- Relay coil resistance (typical): 50–200 ohms (manufacturer-specific; compare to known-good relay)
- Continuity: supply fuse to relay coil terminal should show near 0 ohms (
- Ground continuity: relay coil ground to battery negative: near 0 ohms (
Diagnostic algorithm
- Safety first: ensure vehicle is parked, ignition off, and battery stable; use PPE and follow manufacturer procedures.
- Retrieve freeze frame and confirm B1314 is present; clear code and attempt to re-create to verify active condition.
- Visually inspect relay, socket, harness, and all visible wiring for damage, corrosion, loose pins or water ingress. Repair as needed.
- Check relevant fuses and fusible links for continuity; replace any blown fuses.
- With relay in place, backprobe relay coil supply and coil control pins. Command the battery saver function from a scan tool or switch to the state that should energize the relay and observe coil supply and control voltages. Expect battery voltage on supply and battery or near 0 V on control depending on driver type.
- If no coil supply, trace and repair open circuit from fuse/power source to relay. If coil supply present but no control drive, test continuity between BCM control pin and relay connector; inspect connector and wiring for opens.
- Remove relay and measure coil resistance on bench. If coil is open (infinite resistance), replace relay. If resistance is within spec, reinstall and re-test.
- If wiring and relay are good but no control signal from BCM, check BCM driver output with oscilloscope or multimeter and verify ground references. If BCM output is missing or stuck, consider BCM software update or replacement per manufacturer guidance.
- After repairs, clear codes, operate vehicle through relevant cycles, and verify code does not return and battery saver function operates normally.
Likely causes
- Broken or pinched conductor in harness to relay coil
- Corroded relay socket terminals or water ingress
- Battery saver relay coil internally open
- Blown in-line fuse supplying relay coil
- Connector not fully seated after service
Fault status
Status
Battery saver relay coil circuit open — circuit continuity or control drive to relay coil not detected.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
B1314
MITSUBISHI
B — Body
Timeout error (TN panel close)
Views:
UK: 5
EN: 8
RU: 3
AI status
Completed
Completed
100%
Causes
- Open or damaged wiring between BCM/body control module and battery saver relay coil
- Corroded, loose or disconnected relay connector or terminals
- Faulty battery saver relay (open coil)
- Blown fuse or fusible link protecting the relay coil circuit
- Faulty BCM/body control module driver (open control transistor)
- Poor ground at relay coil or related grounds
Symptoms
- Battery saver feature does not engage (accessories remain powered)
- Parasitic battery drain or premature battery discharge
- Accessories not switching off automatically with ignition off
- Possible interior lighting or convenience features staying on
- Possible related warning messages or stored body module errors
What to check
- Read stored codes and freeze frame with scan tool; confirm B1314 is current or historic
- Perform visual inspection of relay, harness, connector and related fuses for damage or corrosion
- Verify vehicle battery voltage is healthy (12.4–12.8V at rest)
- Check fuse and any inline fuse link for continuity
- With ignition in the state that should command battery saver, use scan tool to actuate battery saver relay (if available) and listen/observe for relay click
- Probe relay coil terminals for voltage while commanding relay from scan tool or turning ignition to the state that should energize coil
Signal parameters
- Relay coil voltage when commanded: approximately battery voltage (11–14.5 V) at coil supply terminal
- Relay coil voltage when not commanded: ~0 V at control/driver terminal (may see pull-down or low voltage)
- Relay coil resistance (typical): 50–200 ohms (manufacturer-specific; compare to known-good relay)
- Continuity: supply fuse to relay coil terminal should show near 0 ohms (
- Ground continuity: relay coil ground to battery negative: near 0 ohms (
Diagnostic algorithm
- Safety first: ensure vehicle is parked, ignition off, and battery stable; use PPE and follow manufacturer procedures.
- Retrieve freeze frame and confirm B1314 is present; clear code and attempt to re-create to verify active condition.
- Visually inspect relay, socket, harness, and all visible wiring for damage, corrosion, loose pins or water ingress. Repair as needed.
- Check relevant fuses and fusible links for continuity; replace any blown fuses.
- With relay in place, backprobe relay coil supply and coil control pins. Command the battery saver function from a scan tool or switch to the state that should energize the relay and observe coil supply and control voltages. Expect battery voltage on supply and battery or near 0 V on control depending on driver type.
- If no coil supply, trace and repair open circuit from fuse/power source to relay. If coil supply present but no control drive, test continuity between BCM control pin and relay connector; inspect connector and wiring for opens.
- Remove relay and measure coil resistance on bench. If coil is open (infinite resistance), replace relay. If resistance is within spec, reinstall and re-test.
- If wiring and relay are good but no control signal from BCM, check BCM driver output with oscilloscope or multimeter and verify ground references. If BCM output is missing or stuck, consider BCM software update or replacement per manufacturer guidance.
- After repairs, clear codes, operate vehicle through relevant cycles, and verify code does not return and battery saver function operates normally.
Likely causes
- Broken or pinched conductor in harness to relay coil
- Corroded relay socket terminals or water ingress
- Battery saver relay coil internally open
- Blown in-line fuse supplying relay coil
- Connector not fully seated after service
Fault status
Status
Battery saver relay coil circuit open — circuit continuity or control drive to relay coil not detected.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
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+100 karma for a short comment :)
Was this AI description helpful?
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Code
B1314
Other
B — Body
Battery Saver Relay Coil Circuit Open
Views:
UK: 17
EN: 28
RU: 15
AI status
Completed
Completed
100%
Causes
- Open or damaged wiring between BCM/body control module and battery saver relay coil
- Corroded, loose or disconnected relay connector or terminals
- Faulty battery saver relay (open coil)
- Blown fuse or fusible link protecting the relay coil circuit
- Faulty BCM/body control module driver (open control transistor)
- Poor ground at relay coil or related grounds
Symptoms
- Battery saver feature does not engage (accessories remain powered)
- Parasitic battery drain or premature battery discharge
- Accessories not switching off automatically with ignition off
- Possible interior lighting or convenience features staying on
- Possible related warning messages or stored body module errors
What to check
- Read stored codes and freeze frame with scan tool; confirm B1314 is current or historic
- Perform visual inspection of relay, harness, connector and related fuses for damage or corrosion
- Verify vehicle battery voltage is healthy (12.4–12.8V at rest)
- Check fuse and any inline fuse link for continuity
- With ignition in the state that should command battery saver, use scan tool to actuate battery saver relay (if available) and listen/observe for relay click
- Probe relay coil terminals for voltage while commanding relay from scan tool or turning ignition to the state that should energize coil
Signal parameters
- Relay coil voltage when commanded: approximately battery voltage (11–14.5 V) at coil supply terminal
- Relay coil voltage when not commanded: ~0 V at control/driver terminal (may see pull-down or low voltage)
- Relay coil resistance (typical): 50–200 ohms (manufacturer-specific; compare to known-good relay)
- Continuity: supply fuse to relay coil terminal should show near 0 ohms (
- Ground continuity: relay coil ground to battery negative: near 0 ohms (
Diagnostic algorithm
- Safety first: ensure vehicle is parked, ignition off, and battery stable; use PPE and follow manufacturer procedures.
- Retrieve freeze frame and confirm B1314 is present; clear code and attempt to re-create to verify active condition.
- Visually inspect relay, socket, harness, and all visible wiring for damage, corrosion, loose pins or water ingress. Repair as needed.
- Check relevant fuses and fusible links for continuity; replace any blown fuses.
- With relay in place, backprobe relay coil supply and coil control pins. Command the battery saver function from a scan tool or switch to the state that should energize the relay and observe coil supply and control voltages. Expect battery voltage on supply and battery or near 0 V on control depending on driver type.
- If no coil supply, trace and repair open circuit from fuse/power source to relay. If coil supply present but no control drive, test continuity between BCM control pin and relay connector; inspect connector and wiring for opens.
- Remove relay and measure coil resistance on bench. If coil is open (infinite resistance), replace relay. If resistance is within spec, reinstall and re-test.
- If wiring and relay are good but no control signal from BCM, check BCM driver output with oscilloscope or multimeter and verify ground references. If BCM output is missing or stuck, consider BCM software update or replacement per manufacturer guidance.
- After repairs, clear codes, operate vehicle through relevant cycles, and verify code does not return and battery saver function operates normally.
Likely causes
- Broken or pinched conductor in harness to relay coil
- Corroded relay socket terminals or water ingress
- Battery saver relay coil internally open
- Blown in-line fuse supplying relay coil
- Connector not fully seated after service
Fault status
Status
Battery saver relay coil circuit open — circuit continuity or control drive to relay coil not detected.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
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Was this AI description helpful?
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👍 Like
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0
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