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2 CHECK HO2S1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 1. Disconnect ECM harness connector. SEC099D SEC134D 3. Check harness continuity between ECM terminal and HO2S1 terminal as follows. Refer to Wiring Diagram. MTBL1148 Continuity should exist. 4. Check harness continuity between ECM terminal or HO2S1 terminal and ground as follows. Refer to Wiring Diagram. MTBL1149 Continuity should not exist. 5. Also check harness for short to power. OK or NG OK (With CONSULT-II) © GO TO 3. OK (Without CONSULT- © GO TO 4. NG © Repair open circuit or short to ground 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 P0134, P0154 HO2S1 Diagnostic Procedure (Cont’d) EC-253 |