2NZ-FE ENGINE CONTROL SFI SYSTEM FAIL-SAFE CHART
If any of the following DTCs are stored, the ECM enters fail-safe mode to allow the vehicle to be driven temporarily or stops fuel injection.
| DTC No. | Component | Fail-Safe Operation | Fail-Safe Deactivation Condition |
|---|---|---|---|
| P0011 | Camshaft Timing Oil Control Valve Assembly | ·
Idle up (Control of combustion worsening) ·
Stopping fuel-cut control |
Pass condition detected |
| P0031
P0032 |
Heated oxygen sensor heater | The ECM turns off the heated oxygen sensor heater. | Ignition switch off |
| P0100
P0102 P0103 |
Mass air flow meter sub-assembly | The ECM calculates ignition timing according to the engine speed and throttle valve position. | Pass condition detected |
| P0110
P0112 P0113 |
Intake air temperature sensor | The ECM estimates the intake air temperature to be 20°C (68°F). | Pass condition detected |
| P0115
P0117 P0118 |
Engine coolant temperature sensor | The ECM estimates the engine coolant temperature to be 80°C (176°F). | Pass condition detected |
| P0120
P0121 P0122 P0123 P0220 P0222 P0223 P0604 P0606 P060A P060D P060E P0657 P2102 P2103 P2111 P2112 P2118 P2119 P2135 |
Electronic throttle control system | The ECM cuts off throttle actuator current and the throttle valve is returned to a 6° throttle position by the return spring.
The ECM then adjusts the engine output by controlling fuel injection (intermittent fuel-cut) and ignition timing in accordance with the accelerator pedal opening angle to allow the vehicle to continue at minimal speed*. |
Pass condition detected and then ignition switch turned off |
| P0327
P0328 |
Knock control sensor | The ECM sets the ignition timing to maximum retard. | Ignition switch off |
| P0351
P0352 P0353 P0354 |
Ignition coil assembly | The ECM cuts the fuel injection. | Pass condition detected |
| P2120
P2121 P2122 P2123 P2125 P2127 P2128 P2138 |
Accelerator pedal sensor assembly | Accelerator pedal position sensor has 2 sensor circuits: Main and Sub.
If either circuit malfunctions, ECM limits the engine output. If both circuits malfunction, ECM regards accelerator pedal as being released. As a result, throttle valve is closed and engine idles. |
Pass condition detected and then ignition switch turned off |
- HINT:
-
*1: 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.