B1314

Code

Other B — Body

Battery Saver Relay Coil Circuit Open

Brand: Other

Type: B — Body

Views: UK: 28 EN: 45 RU: 25

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Battery saver / ignition-off accessory not functioning (items remain powered or do not shut off)
Relay does not click when commanded
Parasitic battery drain or no battery-saving function
Related accessory loads not switching correctly
Stored B1314 DTC and possibly related body/control module codes

Read and record freeze frame and related DTCs from the BCM or diagnostic tool
Visual inspection of relay, socket, wiring harness, connectors and fuses for corrosion, damage or loose terminals
Check battery voltage and ground integrity before and during tests
Probe the relay coil terminals to verify presence of feed voltage and ground when relay is commanded
Measure coil continuity/resistance with meter and compare to specification
Wiggle harness and connectors while monitoring continuity/voltage to locate intermittent opens

Nominal coil voltage: 12 V system; activation should be near battery voltage (typically >10–12 V) when commanded
Typical coil resistance range (dependent on relay type): ~50–200 Ω (measure and compare to service spec)
Coil current when energized: roughly 0.06–0.25 A (depends on coil resistance)
Open-circuit condition: infinite or very high resistance on coil terminal to terminal
Diagnostic threshold: BCM detected no coil current or no continuity when command output asserted

Retrieve DTCs and related codes; note conditions when code set (voltage, key state, time).
Visually inspect relay, socket and wiring for corrosion, damage, loose terminals and blown fuses; repair obvious faults.
With ignition off, remove relay and measure coil resistance across relay coil pins. If open (infinite) replace relay and retest.
Reinstall relay. With a helper or diagnostic tool commanding the relay, back-probe coil power and coil ground terminal. Verify feed voltage when commanded and a ground or driver return present.
If feed voltage is missing, trace and repair fuse, fusible link or supply circuit between battery/ignition feed and relay coil.
If feed present but ground/driver not present, test BCM output driver: measure whether the module attempts to switch to ground (or supplies ground path). If driver does not switch, check module grounds and related inputs; consult module diagnostics.
Perform wiggle tests on harness/connectors while commanding relay to identify intermittent opens. Repair wiring harness or connector as needed.
After repairs, clear codes, cycle power/ignition and confirm relay operation and that B1314 does not return. Re-scan for related codes and perform functional checks of battery saver feature.