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Diagnostic Procedure NLEC0142 1 CHECK POWER SUPPLY 1. Turn ignition switch “OFF”. SEF012XA 3. Turn ignition switch “ON”. SEF025X Voltage: Battery voltage OK or NG OK © GO TO 3. NG © GO TO 2. 2 DETECT MALFUNCTIONING PART Check the following. I Harness connectors F104, M50 I 10A fuse I Harness for open or short between heated oxygen sensor 1 (front) and fuse © Repair harness or connectors. 3 CHECK OUTPUT SIGNAL CIRCUIT 1. Turn ignition switch “OFF”. Refer to wiring diagram. Continuity should exist. 4. Also check harness for short to ground and short to power. OK or NG OK © GO TO 4. NG © Repair open circuit or short to ground or short to power in harness or connectors. DTC P0135 HEATED OXYGEN SENSOR 1 (FRONT) HEATER QG16 I 18DE Diagnostic Procedure EC-169 |