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6 CHECK ECM RELAY 1. Apply 12V direct current between ECM relay terminals 1 and 2. SEF296X OK or NG OK E GO TO 7. NG E Replace ECM relay. 7 CHECK EGR VOLUME CONTROL VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch “OFF”. Refer to Wiring Diagram. MTBL0442 Continuity should exist. 4. Also check harness for short to ground and short to power. OK or NG OK E GO TO 9. NG E GO TO 8. 8 DETECT MALFUNCTIONING PART Check the following. I Harness connectors E225, F108 I Harness connectors F135, M842 (RHD models) I Harness for open or short between EGR volume control valve and ECM E Repair open circuit or short to ground or short to power in harness or connectors. DTC 1003 EGR VOLUME CONT/V ZD30DDTi Diagnostic Procedure (Cont’d) EC-229 |