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3 CHECK MAFS GROUND CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch “OFF”. MEC994D 3. Check harness continuity between mass air flow sensor terminal 3 and engine ground. Refer to Wiring Diagram. Continuity should exist. 4. Also check harness for short to ground and short to power. OK or NG OK E GO TO 5. NG E GO TO 4. 4 DETECT MALFUNCTIONING PART Check the following. I Harness connectors F135, M842 (RHD models) I Harness for open or short between mass air flow sensor and ECM E Repair open circuit or short to ground or short to power in harness or connectors. 5 CHECK MAFS INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 1. Disconnect ECM harness connector. Continuity should exist. 3. Also check harness for short to ground and short to power. OK or NG OK E GO TO 7. NG E GO TO 6. 6 DETECT MALFUNCTIONING PART Check the following. I Harness connectors F135, M842 (RHD models) I Harness for open or short between mass air flow sensor and ECM E Repair open circuit or short to ground or short to power in harness or connectors. DTC 0102 MASS AIR FLOW SEN ZD30DDTi Diagnostic Procedure (Cont’d) EC-93 |