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EC-350 < DTC/CIRCUIT DIAGNOSIS > [VQ35DE] P1550 BATTERY CURRENT SENSOR P1550 BATTERY CURRENT SENSOR DTC Logic INFOID:0000000009651194 DTC DETECTION LOGIC NOTE: DTC CONFIRMATION PROCEDURE 1. PRECONDITIONING If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct- Turn ignition switch OFF and wait at least 10 seconds. 2. Turn ignition switch ON. 3. Turn ignition switch OFF and wait at least 10 seconds. TESTING CONDITION: >> GO TO 2. 2. PERFORM DTC CONFIRMATION PROCEDURE 1. Start engine and wait at least 10 seconds. 2. Check 1st trip DTC. Is 1st trip DTC detected? YES >> Proceed to . NO >> INSPECTION END Diagnosis Procedure INFOID:0000000009651195 1. CHECK BATTERY CURRENT SENSOR POWER SUPPLY 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 2. NO >> Repair open circuit, short to ground or short to power in harness or connectors. 2. 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. DTC No. Trouble diagnosis name DTC detecting condition Possible cause P1550 Battery current sensor circuit The output voltage of the battery current • Harness or connectors (The sensor circuit is open or shorted.) • Battery current sensor Battery current sensor Ground Voltage (V) Connector Terminal F76 1 Ground Approx. 5 Battery current sensor ECM Continuity Connector Terminal Connector Terminal F76 3 F8 68 Existed |