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EC-780 < COMPONENT DIAGNOSIS > [VK56DE] P0603 ECM POWER SUPPLY Check the following. • IPDM E/R connector E121 • 20 A fuse (No. 53) • Harness for open or short between ECM and battery >> Repair or replace harness or connectors. 3. CHECK INTERMITTENT INCIDENT GI-37, "Intermittent Incident" OK or NG OK >> GO TO 4. NG >> Repair or replace harness or connectors. 4. PERFORM DTC CONFIRMATION PROCEDURE 1. Turn ignition switch ON. 2. Erase DTC. Refer to EC-536, "Emission-related Diagnostic Information" . 3. Perform DTC Confirmation Procedure. Refer to EC-779, "DTC Confirmation Procedure" . 4. Is the 1st trip DTC P0603 displayed again? Yes >> GO TO 5. No >> INSPECTION END 5. REPLACE ECM 1. Replace ECM. 2. Perform initialization of NVIS(NATS) system and registration of all NVIS(NATS) ignition key IDs. Refer to SEC-10, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement" SEC-124, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement" (without intelligent key system). 3. Perform 4. Perform EC-511, "Accelerator Pedal Released Position Learning" . 5. Perform EC-511, "Throttle Valve Closed Position Learning" 6. Perform EC-511, "Idle Air Volume Learning" . >> INSPECTION END 2010 Pathfinder |