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4 CHECK HO2S2 (REAR) GROUND CIRCUIT FOR OPEN AND SHORT 1. Check harness continuity between HO2S2 (rear) terminal 4 and engine ground. Refer to Wiring Diagram. Continuity should exist. 2. Also check harness for short to power. OK or NG OK (With CONSULT-II) © GO TO 5. OK (Without CONSULT- © GO TO 6. NG © Repair open circuit or short to power in harness or connectors. 5 CHECK HEATED OXYGEN SENSOR 2 (REAR) With CONSULT-II 1. Start engine and drive vehicle at a speed of more than 70 km/h (43 MPH) for 2 consecutive minutes. II. 4. Check “HO2S2 (B1)/(B2)” at idle speed when adjusting “FUEL INJECTION” to ± 25%. SEF066Y “HO2S2 (B1)/(B2)” should be above 0.56V at least once when the “FUEL INJECTION” is +25%. CAUTION: Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a OK or NG OK © GO TO 9. NG © GO TO 8. GI MA EM LC FE AT AX SU BR ST RS BT HA SC EL IDX DTC P0138 (BANK 1), P0158 (BANK 2) HO2S2 (REAR) (MAX. VOLTAGE MONITORING) Diagnostic Procedure (Cont’d) EC-263 |