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Fail-safe Chart =NMEC0040 The ECM enters fail-safe mode, if any of the following malfunctions is detected due to the open or short cir- DTC No. Detected items Engine operating condition in fail-safe mode 0102 Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut. 0103 Engine coolant temperature Engine coolant temperature will be determined by ECM based on the time after Condition Engine coolant temperature decided (CONSULT-II display) Just as ignition switch is turned 20°C (68°F) More than approx. 6 minutes 80°C (176°F) Except as shown above 20 - 80°C (68 - 176°F) (Depends on the time) 0403 Throttle position sensor cir- Throttle position will be determined based on the injected fuel amount and the Condition Driving condition When engine is idling Normal When accelerating Poor acceleration Unable to ECM ECM fail-safe activating condition ECM fail-safe operation Engine speed Engine speed will not rise more than 3,000 rpm Fuel injection Simultaneous multiport fuel injection system Ignition timing Ignition timing is fixed at the preset valve Fuel pump Fuel pump relay is “ON” when engine is running and “OFF” when engine stalls IACV-AAC valve Full open Cooling fans Cooling fan relay “ON” (High speed condition) when engine is running, and “OFF” when engine stalls. Replace ECM, if ECM fail-safe condition is confirmed. GI MA EM LC FE CL MT AT PD AX SU BR ST RS BT HA SC EL IDX TROUBLE DIAGNOSIS — GENERAL DESCRIPTION Fail-safe Chart EC-67 |