Code
B1292
ALFA ROMEO
B — Body
Battery supply relay circuit
Views:
UK: 4
EN: 6
RU: 3
AI status
Completed
Completed
100%
Causes
- Faulty battery supply relay (stuck open/closed or coil failure)
- Blown or corroded fuse(s) in the supply circuit
- Low or weak battery voltage
- Poor or corroded connector/terminal at relay, battery or fuse box
- Damaged or shorted wiring (open, short-to-ground or short-to-voltage)
- Poor chassis or engine ground(s)
Symptoms
- Battery or electrical system warning lamp illuminated
- Accessories or some electrical systems not functioning or intermittent
- Vehicle may not wake or may experience no-crank / no-start in some cases
- Parasitic battery drain or failure to enter sleep mode
- Multiple body electrical fault codes stored
- Clicking from relay area when key is turned or intermittently
What to check
- Read all stored DTCs and freeze-frame data with a capable scan tool
- Check battery resting voltage and battery health (load/cranking test)
- Visually inspect relay, fuse box and connectors for corrosion or damage
- Confirm presence of required fuses and verify fuse integrity
- Backprobe relay terminals to check control and supply voltages with key off/on/crank
- Check continuity between battery positive and relay supply terminal
Signal parameters
- Battery supply (relay input) should show battery voltage (~12.0–12.8 V at rest) with ignition off
- With engine running, supply should be charging voltage (~13.5–14.8 V) where applicable
- Relay control signal (coil input) is typically switched by the BCM; expect near 0 V or battery voltage depending on design when toggled
- Relay coil resistance typically measured in tens to a few hundred ohms (varies by relay); refer to service data
- Open-circuit or sudden drop in supply voltage at relay output indicates supply/wiring/relay fault
Diagnostic algorithm
- Retrieve all codes and freeze-frame; note any related body or powertrain codes.
- Verify battery state-of-charge and perform a battery load/cranking test; charge or replace battery if weak.
- Visually inspect relay, fuse box and connectors for corrosion, heat damage or moisture; repair as needed.
- Check relevant fuses for continuity and correct rating; replace blown fuses and investigate cause if they blow again.
- With a DVM, measure voltage at relay supply terminal (should be battery voltage). If absent, trace back to battery/fuse link.
- Energize relay (operate ignition/accessory) and verify relay output terminal voltage; if input present and output absent, suspect relay or internal fuse.
- Backprobe coil/control terminals while commanding relay via scan tool or switching ignition; verify control driver changes state as expected.
- Perform continuity/resistance checks from relay output to downstream distribution points to find opens or shorts.
- If wiring and relay test good, check BCM/power distribution module outputs for correct voltages and operation. Swap with known-good module only as guided by service info.
- If intermittent, perform wiggle tests and load tests while monitoring signals; consider replacing relay and repairing wiring connectors.
- Clear codes and test drive / cycle ignition to confirm repair and that code does not return. If it returns, escalate to module-level diagnostics and consult wiring diagrams and manufacturer bulletins.
Likely causes
- Defective battery supply relay
- Loose or corroded connector at the relay or battery junction
- Blown fuse feeding the relay or its load
- Low battery state-of-charge or failing battery affecting relay operation
- Intermittent wiring fault (chafed harness or pin damage)
- Faulty BCM output driver (less likely than wiring/relay)
Fault status
Status
Battery supply relay circuit fault detected. Inspect relay, fuses, wiring and module outputs before replacing modules.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
B1292
FIAT
B — Body
Battery supply relay circuit
Views:
UK: 4
EN: 7
RU: 3
AI status
Completed
Completed
100%
Causes
- Faulty battery supply relay (stuck open/closed or coil failure)
- Blown or corroded fuse(s) in the supply circuit
- Low or weak battery voltage
- Poor or corroded connector/terminal at relay, battery or fuse box
- Damaged or shorted wiring (open, short-to-ground or short-to-voltage)
- Poor chassis or engine ground(s)
Symptoms
- Battery or electrical system warning lamp illuminated
- Accessories or some electrical systems not functioning or intermittent
- Vehicle may not wake or may experience no-crank / no-start in some cases
- Parasitic battery drain or failure to enter sleep mode
- Multiple body electrical fault codes stored
- Clicking from relay area when key is turned or intermittently
What to check
- Read all stored DTCs and freeze-frame data with a capable scan tool
- Check battery resting voltage and battery health (load/cranking test)
- Visually inspect relay, fuse box and connectors for corrosion or damage
- Confirm presence of required fuses and verify fuse integrity
- Backprobe relay terminals to check control and supply voltages with key off/on/crank
- Check continuity between battery positive and relay supply terminal
Signal parameters
- Battery supply (relay input) should show battery voltage (~12.0–12.8 V at rest) with ignition off
- With engine running, supply should be charging voltage (~13.5–14.8 V) where applicable
- Relay control signal (coil input) is typically switched by the BCM; expect near 0 V or battery voltage depending on design when toggled
- Relay coil resistance typically measured in tens to a few hundred ohms (varies by relay); refer to service data
- Open-circuit or sudden drop in supply voltage at relay output indicates supply/wiring/relay fault
Diagnostic algorithm
- Retrieve all codes and freeze-frame; note any related body or powertrain codes.
- Verify battery state-of-charge and perform a battery load/cranking test; charge or replace battery if weak.
- Visually inspect relay, fuse box and connectors for corrosion, heat damage or moisture; repair as needed.
- Check relevant fuses for continuity and correct rating; replace blown fuses and investigate cause if they blow again.
- With a DVM, measure voltage at relay supply terminal (should be battery voltage). If absent, trace back to battery/fuse link.
- Energize relay (operate ignition/accessory) and verify relay output terminal voltage; if input present and output absent, suspect relay or internal fuse.
- Backprobe coil/control terminals while commanding relay via scan tool or switching ignition; verify control driver changes state as expected.
- Perform continuity/resistance checks from relay output to downstream distribution points to find opens or shorts.
- If wiring and relay test good, check BCM/power distribution module outputs for correct voltages and operation. Swap with known-good module only as guided by service info.
- If intermittent, perform wiggle tests and load tests while monitoring signals; consider replacing relay and repairing wiring connectors.
- Clear codes and test drive / cycle ignition to confirm repair and that code does not return. If it returns, escalate to module-level diagnostics and consult wiring diagrams and manufacturer bulletins.
Likely causes
- Defective battery supply relay
- Loose or corroded connector at the relay or battery junction
- Blown fuse feeding the relay or its load
- Low battery state-of-charge or failing battery affecting relay operation
- Intermittent wiring fault (chafed harness or pin damage)
- Faulty BCM output driver (less likely than wiring/relay)
Fault status
Status
Battery supply relay circuit fault detected. Inspect relay, fuses, wiring and module outputs before replacing modules.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
B1292
LAND ROVER
B — Body
Climate control relay - circuit failure
Views:
UK: 6
EN: 12
RU: 6
AI status
Completed
Completed
100%
Causes
- Faulty battery supply relay (stuck open/closed or coil failure)
- Blown or corroded fuse(s) in the supply circuit
- Low or weak battery voltage
- Poor or corroded connector/terminal at relay, battery or fuse box
- Damaged or shorted wiring (open, short-to-ground or short-to-voltage)
- Poor chassis or engine ground(s)
Symptoms
- Battery or electrical system warning lamp illuminated
- Accessories or some electrical systems not functioning or intermittent
- Vehicle may not wake or may experience no-crank / no-start in some cases
- Parasitic battery drain or failure to enter sleep mode
- Multiple body electrical fault codes stored
- Clicking from relay area when key is turned or intermittently
What to check
- Read all stored DTCs and freeze-frame data with a capable scan tool
- Check battery resting voltage and battery health (load/cranking test)
- Visually inspect relay, fuse box and connectors for corrosion or damage
- Confirm presence of required fuses and verify fuse integrity
- Backprobe relay terminals to check control and supply voltages with key off/on/crank
- Check continuity between battery positive and relay supply terminal
Signal parameters
- Battery supply (relay input) should show battery voltage (~12.0–12.8 V at rest) with ignition off
- With engine running, supply should be charging voltage (~13.5–14.8 V) where applicable
- Relay control signal (coil input) is typically switched by the BCM; expect near 0 V or battery voltage depending on design when toggled
- Relay coil resistance typically measured in tens to a few hundred ohms (varies by relay); refer to service data
- Open-circuit or sudden drop in supply voltage at relay output indicates supply/wiring/relay fault
Diagnostic algorithm
- Retrieve all codes and freeze-frame; note any related body or powertrain codes.
- Verify battery state-of-charge and perform a battery load/cranking test; charge or replace battery if weak.
- Visually inspect relay, fuse box and connectors for corrosion, heat damage or moisture; repair as needed.
- Check relevant fuses for continuity and correct rating; replace blown fuses and investigate cause if they blow again.
- With a DVM, measure voltage at relay supply terminal (should be battery voltage). If absent, trace back to battery/fuse link.
- Energize relay (operate ignition/accessory) and verify relay output terminal voltage; if input present and output absent, suspect relay or internal fuse.
- Backprobe coil/control terminals while commanding relay via scan tool or switching ignition; verify control driver changes state as expected.
- Perform continuity/resistance checks from relay output to downstream distribution points to find opens or shorts.
- If wiring and relay test good, check BCM/power distribution module outputs for correct voltages and operation. Swap with known-good module only as guided by service info.
- If intermittent, perform wiggle tests and load tests while monitoring signals; consider replacing relay and repairing wiring connectors.
- Clear codes and test drive / cycle ignition to confirm repair and that code does not return. If it returns, escalate to module-level diagnostics and consult wiring diagrams and manufacturer bulletins.
Likely causes
- Defective battery supply relay
- Loose or corroded connector at the relay or battery junction
- Blown fuse feeding the relay or its load
- Low battery state-of-charge or failing battery affecting relay operation
- Intermittent wiring fault (chafed harness or pin damage)
- Faulty BCM output driver (less likely than wiring/relay)
Fault status
Status
Battery supply relay circuit fault detected. Inspect relay, fuses, wiring and module outputs before replacing modules.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
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Code
B1292
Other
B — Body
Battery Power Relay Circuit Failure
Views:
UK: 18
EN: 22
RU: 17
AI status
Completed
Completed
100%
Causes
- Faulty battery supply relay (stuck open/closed or coil failure)
- Blown or corroded fuse(s) in the supply circuit
- Low or weak battery voltage
- Poor or corroded connector/terminal at relay, battery or fuse box
- Damaged or shorted wiring (open, short-to-ground or short-to-voltage)
- Poor chassis or engine ground(s)
Symptoms
- Battery or electrical system warning lamp illuminated
- Accessories or some electrical systems not functioning or intermittent
- Vehicle may not wake or may experience no-crank / no-start in some cases
- Parasitic battery drain or failure to enter sleep mode
- Multiple body electrical fault codes stored
- Clicking from relay area when key is turned or intermittently
What to check
- Read all stored DTCs and freeze-frame data with a capable scan tool
- Check battery resting voltage and battery health (load/cranking test)
- Visually inspect relay, fuse box and connectors for corrosion or damage
- Confirm presence of required fuses and verify fuse integrity
- Backprobe relay terminals to check control and supply voltages with key off/on/crank
- Check continuity between battery positive and relay supply terminal
Signal parameters
- Battery supply (relay input) should show battery voltage (~12.0–12.8 V at rest) with ignition off
- With engine running, supply should be charging voltage (~13.5–14.8 V) where applicable
- Relay control signal (coil input) is typically switched by the BCM; expect near 0 V or battery voltage depending on design when toggled
- Relay coil resistance typically measured in tens to a few hundred ohms (varies by relay); refer to service data
- Open-circuit or sudden drop in supply voltage at relay output indicates supply/wiring/relay fault
Diagnostic algorithm
- Retrieve all codes and freeze-frame; note any related body or powertrain codes.
- Verify battery state-of-charge and perform a battery load/cranking test; charge or replace battery if weak.
- Visually inspect relay, fuse box and connectors for corrosion, heat damage or moisture; repair as needed.
- Check relevant fuses for continuity and correct rating; replace blown fuses and investigate cause if they blow again.
- With a DVM, measure voltage at relay supply terminal (should be battery voltage). If absent, trace back to battery/fuse link.
- Energize relay (operate ignition/accessory) and verify relay output terminal voltage; if input present and output absent, suspect relay or internal fuse.
- Backprobe coil/control terminals while commanding relay via scan tool or switching ignition; verify control driver changes state as expected.
- Perform continuity/resistance checks from relay output to downstream distribution points to find opens or shorts.
- If wiring and relay test good, check BCM/power distribution module outputs for correct voltages and operation. Swap with known-good module only as guided by service info.
- If intermittent, perform wiggle tests and load tests while monitoring signals; consider replacing relay and repairing wiring connectors.
- Clear codes and test drive / cycle ignition to confirm repair and that code does not return. If it returns, escalate to module-level diagnostics and consult wiring diagrams and manufacturer bulletins.
Likely causes
- Defective battery supply relay
- Loose or corroded connector at the relay or battery junction
- Blown fuse feeding the relay or its load
- Low battery state-of-charge or failing battery affecting relay operation
- Intermittent wiring fault (chafed harness or pin damage)
- Faulty BCM output driver (less likely than wiring/relay)
Fault status
Status
Battery supply relay circuit fault detected. Inspect relay, fuses, wiring and module outputs before replacing modules.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
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0
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