FAIL SAFE
If the ETCS has a malfunction, the ECM cuts off current to the throttle control motor. The throttle valve returns predetermined opening angle (approximately 16°) by the force of the return spring. The ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition timing in accordance with the accelerator pedal opening angle to enable the vehicle to continue at a minimal speed.
If the accelerator pedal is depressed firmly and slowly, the vehicle can be driven slowly.
If a "pass" condition is detected and then the ignition switch is turned OFF, the fail-safe operation will stop and the system will return to normal condition.
Scheme 614
If the ETCS has a malfunction, the ECM cuts off current to the throttle control motor. The throttle valve returns to a predetermined opening angle (approximately 16°) by the force of the return spring. The ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition timing in accordance with the accelerator pedal opening angle to enable the vehicle to continue at a minimal speed.
If the accelerator pedal is depressed firmly and slowly, the vehicle can be driven slowly.
If a "pass" condition is detected and then the ignition switch is turned OFF, the fail-safe operation will ST and the system will return to normal condition.
HO2S voltage (P0130 and P0150)
Scheme 615
HO2S voltage stuck Lean (P2195 and P2197)
Scheme 616
HO2S voltage stuck Rich (P2196 and P2198)
