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EC-1442 [YD (WITHOUT EURO-OBD)] DTC P0686 ECM RELAY Diagnostic Procedure EBS014YM 1. CHECK ECM OUTPUT SIGNAL CIRCUIT FOR SHORT TO GROUND 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Check harness continuity between ECM terminals 105, 113 and ground. OK or NG OK >> GO TO 2. NG >> Repair short to ground in harness or connectors. 2. CHECK ECM INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 1. Disconnect ECM relay. 2. Check harness continuity between ECM terminals 119, 120 and 3. Also check harness for short to ground and short to power. OK or NG OK >> GO TO 3. NG >> Repair open circuit or short to ground or short to power in harness or connectors. 3. CHECK ECM RELAY Refer to EC-1442, "Component Inspection" . OK or NG OK >> GO TO 4. NG >> Replace ECM relay. 4. CHECK INTERMITTENT INCIDENT Refer to EC-1309, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" . >> INSPECTION END Component Inspection EBS014YN ECM RELAY 1. Apply 12V direct current between ECM relay terminals 1 and 2. 2. Check continuity between relay terminals 3 and 5, 6 and 7. 3. If NG, replace ECM relay. Continuity should not exist. Continuity should exist. MBIB0922E Condition Continuity 12V direct current supply between ter- Yes OFF No PBIB0077E |