|
|
2 CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 1. Disconnect heated oxygen sensor 2 harness connector. SEC134D 2. Disconnect ECM harness connector. Refer to Wiring Diagram. MTBL1150 Continuity should exist. 4. Check harness continuity between ECM terminal or HO2S2 terminal and ground as follows. Refer to Wiring Diagram. MTBL1151 Continuity should not exist. 5. Also check harness for 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 HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT 1. Check harness continuity between HO2S2 terminal 4 and ground. Refer to Wiring Diagram. Continuity should exist. 2. Also check harness for short to power. OK or NG OK © GO TO 5. NG © GO TO 4. 4 DETECT MALFUNCTIONING PART Check the following. I Joint connector-18 I Harness for open and short between HO2S2 and ground © Repair open circuit or short to power in harness or connectors. GI MA EM LC FE AT AX SU BR ST RS BT HA SC EL IDX DTC P0138, P0158 HO2S2 Diagnostic Procedure (Cont’d) EC-261 |