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EC-378 < DTC/CIRCUIT DIAGNOSIS > [VQ35DE] P1554 BATTERY CURRENT SENSOR Is the inspection result normal? YES >> INSPECTION END NO >> Go to Diagnosis Procedure INFOID:0000000009720122 1. CHECK GROUND CONNECTION 1. Turn ignition switch OFF. 2. Check ground connection E38. Refer to Ground Inspection in . Is the inspection result normal? YES >> GO TO 2. NO >> Repair or replace ground connection. 2. CHECK BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT 1. Disconnect battery current sensor harness connector. 2. Turn ignition switch ON. 3. Check the voltage between battery current sensor harness connector and ground. Is the inspection result normal? YES >> GO TO 3. NO >> Repair open circuit, short to ground or short to power in harness or connectors. 3. CHECK BATTERY CURRENT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Check the continuity between battery current sensor harness connector and ECM harness connector. 4. Also check harness for short to ground and short to power. Is the inspection result normal? YES >> GO TO 4. NO >> Repair open circuit, short to ground or short to power in harness or connectors. 4. CHECK BATTERY CURRENT SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 1. Check the continuity between battery current sensor harness connector and ECM harness connector. 2. Also check harness for short to ground and short to power. Is the inspection result normal? ECM Voltage (V) Connector + – Terminal Terminal F8 42 (Battery current sensor signal) 44 (Sensor Above 2.3 at least once Battery current sensor Ground Voltage (V) Connector Terminal F76 1 Ground Approx. 5 Battery current sensor ECM Continuity Connector Terminal Connector Terminal F76 2 F8 44 Existed Battery current sensor ECM Continuity Connector Terminal Connector Terminal F76 3 F8 42 Existed |