Sfi System Fail-Safe Chart

Engine. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
1Az-Fe Engine Control System. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

Sfi System -- Fail-Safe Chart


If any of the following DTCs are set, the ECM enters fail-safe mode to allow the vehicle to be driven temporarily.

DTC No.
Component
Fail-Safe Operation
Fail-Safe Deactivation Condition
P0031 and P0032
Air-Fuel Ratio (A/F) Sensor Heater
ECM turns off A/F sensor heater.
Ignition switch off
P0037 and P0038
Heated Oxygen (HO2) Sensor Heater
ECM turns off HO2 sensor heater.
Ignition switch off
P0100, P0102 and P0103
Mass Air Flow (MAF) Meter
ECM calculates ignition timing according to engine speed and throttle valve position.
Pass condition detected
P0110, P0112 and P0113
Intake Air Temperature (IAT) Sensor
ECM estimates IAT to be 20°C (68°F).
Pass condition detected
P0115, P0117 and P0118
Engine Coolant Temperature (ECT) Sensor
ECM estimates ECT to be 80°C (176°F).
Pass condition detected
P0120, P0121, P0122, P0123, P0220, P0222, P0223, P0604, P0606, P0607, P060A, P060D, P060E, P0657, P1607, P2102, P2103, P2111, P2112, P2118, P2119 and P2135
Electronic Throttle Control System (ETCS)
ECM cuts off throttle actuator current and throttle valve returned to 6.5° throttle position by return spring.
ECM then adjusts engine output by controlling fuel injection (intermittent fuel-cut) and ignition timing in accordance with accelerator pedal opening angle to allow vehicle to continue at minimal speed*.
Pass condition detected and then ignition switch turned off
P0327 and P0328
Knock Sensor
ECM sets ignition timing to maximum retard.
Ignition switch off
P0351, P0352, P0353 and P0354
Igniter
ECM cuts fuel.
Pass condition detected
P2120, P2121, P2122, P2123, P2125, P2127, P2128 and P2138
Accelerator Pedal Position (APP) Sensor
APP sensor has 2 sensor circuits: Main and Sub.
If either circuit malfunctions, ECM controls engine using other circuit.
If both circuits malfunction, ECM regards accelerator pedal as being released. As result, throttle valve closed and engine idles.
Pass condition detected and then ignition switch turned off
NOTICE:
*: The vehicle can be driven slowly when the accelerator pedal is depressed firmly and slowly. If the accelerator pedal is depressed quickly, the vehicle may speed up and slow down erratically.