Engine Control System

DTC CHART (SAE Controlled)

HINT: Parameters listed in the chart may not be exactly the same as your reading due to the type of instrument or other factors.

If a malfunction code is displayed during the DTC check in check mode, check the circuit for that code.





DTC CHART (Manufacturer Controlled)





FAIL-SAFE CHART

If any of the codes in the above chart are recorded, the ECM enters fail-safe mode.

Back-Up Function
If there is trouble with the program in the ECM and ignition signals (IGT) are not output from the microcomputer, the ECM controls fuel injection and ignition timing at predetermined levels as a back-up function to make it possible to continue to operate the vehicle.
Furthermore, the injection duration is calculated from the starting signal (STA) and the closed throttle position switch signal (IDL). Also, the ignition timing is fixed at 5° BTDC, without relation to the engine speed.

HINT: If the engine is controlled by the back-up function, the MIL lights up to warn the driver of the malfunction but the DTC is not output.