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21 CHECK HEATED OXYGEN SENSOR 1 (FRONT) (BANK 2) SIGNAL With CONSULT-II 1. Stop engine. monitor fluctuates between “LEAN” and “RICH” more than 5 times during 10 seconds. → LEAN → RICH 2 times: RICH → LEAN → RICH → LEAN → RICH Without CONSULT-II 1. Stop engine. rpm. → 0.6 - 1.0V → 0 - 0.3V 2 times: 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V OK or NG OK (With CONSULT-II) © GO TO 23. OK (Without CONSULT- © GO TO 24. NG © GO TO 22. 22 DETECT MALFUNCTIONING PART Check the following. Clean or replace if necessary. 4. Check engine coolant temperature sensor and its circuit. Refer to EC-187. (ECM may be the cause of a problem, but this is rarely the case.) © GO TO 3. GI MA EM LC FE AT TF PD AX SU BR ST RS BT HA SC EL IDX BASIC SERVICE PROCEDURE Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d) EC-51 |