Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA20064RUNNER SR5, 4.7 T, AWDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM SFI (2UZ-FE) - DIAGNOSTICS - INTRODUCTIONFAIL-SAFE TABLE
2006 Toyota 4Runner SR5, 4.7 T, AWD
Fail-Safe Table
2006 Toyota 4Runner SR5, 4.7 T, AWDSECTION Fail-Safe Table
If any of the following codes are recorded, the ECM enters the fail-safe mode.
FAIL-SAFE TABLE
| DTC No. | Fail-Safe Operation | Fail-Safe Deactivation Conditions |
|---|---|---|
| P0031 P0032 P0037 P0038 P0051 P0052 P0057 P0058 |
The heater circuit in which an abnormality is detected is turned off | Ignition switch OFF |
| P0100 P0102 P0103 |
Ignition timing is calculated from engine RPM and TP (Throttle Position) | "Pass" condition detected |
| P0110 P0112 P0113 |
IAT (Intake Air Temperature) is fixed at 20°C (68°F) | "Pass" condition detected |
| P0115 P0117 P0118 |
ECT (Engine Coolant Temperature) is fixed at 80°C (176°F) | "Pass" condition detected |
| P0120 P0121 P0122 P0123 P0220 P0222 P0223 P2102 P2103 P2111 P2112 P2118 P2119 P2135 |
If the Electronic Throttle Control System (ETCS) has a malfunction, the ECM cuts off current to the throttle control motor. The throttle control 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 the accelerator pedal is depressed quickly, the vehicle may speed up and slow down erratically. | "Pass" condition detected and then the ignition switch turned OFF |
| P0327 P0328 P0332 P0333 |
Maximum ignition timing retardation | Ignition switch OFF |
| P0351 P0352 P0353 P0354 P0355 P0356 P0357 P0358 |
Fuel is cut | "Pass" condition detected |
| P2120 P2121 P2122 P2123 P2125 P2127 P2128 P2138 |
The accelerator pedal position sensor has two (main and sub) sensor circuits. If a malfunction occurs in either of the sensor circuits, the ECM detects the abnormal signal voltage difference between the two sensor circuits and switches to limp mode. In limp mode, the functioning circuit is used to calculate the accelerator pedal opening angle to allow the vehicle to continue driving. If both circuits malfunction, the ECM regards the opening angle of the accelerator pedal to be fully closed. In this case, the throttle valve will remain closed as if the engine is idling. | "Pass" condition detected and then the ignition switch turned OFF |
| P2440 and P1441 and/or P1444 | Restrict the throttle opening angle: Ga < 30 g/s | "Pass" condition detected |
| P1441 and P1444 | Restrict the throttle opening angle: Ga < 50 g/s | "Pass" condition detected |
| P1441 P1444 |
Restrict the throttle opening angle: Ga < 100 g/s | "Pass" condition detected |
| P2430 P2431 P2432 P2433 |
Restrict the throttle opening angle: Ga < 50 g/s | "Pass" condition detected |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.