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 MANUALSTOYOTA2006RAV4 4WD L4-2.4L (2AZ-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTTRANSMISSION CONTROL SYSTEMSTESTING AND INSPECTIONINITIAL INSPECTION AND DIAGNOSTIC OVERVIEWFAIL-SAFE CHART
2006 Toyota RAV4 4WD L4-2.4L (2AZ-FE)
Fail-Safe Chart
2006 Toyota RAV4 4WD L4-2.4L (2AZ-FE)SECTION Fail-Safe Chart
FAIL-SAFE CHART
1. FAIL-SAFE CHART
This function minimizes the loss of the ECT functions when a malfunction occurs in a sensor or solenoid.
a. Automatic Transmission Fluid (ATF) temperature sensor:
When the ATF temperature sensor has a malfunction, O/D up-shift is prohibited.
b. Counter gear speed sensor NC (Speed sensor NC):
When the counter gear speed sensor has a malfunction, O/D up shift is prohibited.
c. Shift solenoid valve DSL:
When the solenoid valve DSL has a malfunction, the current to the solenoid valve is stopped.
This stops lock-up control, then fuel economy decreases.
d. Shift solenoid valve SL1, SL2 and S4:
If any of the shift solenoid valve circuits develops an open or short, the ECM turns the other shift solenoid ON and OFF in order to shift into the gear positions shown in the table.
Manual shifting as shown in the table must be done. In case of a short circuit, the ECM stops sending the current to the short circuited solenoid.
Even if starting the engine in the fail-safe mode, the gear position remains in the same position.
HINT:
^ : Condition in the normal operation is shown above the arrow.
^ : Condition in the fail-safe mode is shown beneath the arrow.
^ E/B: Engine brake.
1. FAIL-SAFE CHART
This function minimizes the loss of the ECT functions when a malfunction occurs in a sensor or solenoid.
a. Automatic Transmission Fluid (ATF) temperature sensor:
When the ATF temperature sensor has a malfunction, O/D up-shift is prohibited.
b. Counter gear speed sensor NC (Speed sensor NC):
When the counter gear speed sensor has a malfunction, O/D up shift is prohibited.
c. Shift solenoid valve DSL:
When the solenoid valve DSL has a malfunction, the current to the solenoid valve is stopped.
This stops lock-up control, then fuel economy decreases.
d. Shift solenoid valve SL1, SL2 and S4:
If any of the shift solenoid valve circuits develops an open or short, the ECM turns the other shift solenoid ON and OFF in order to shift into the gear positions shown in the table.
Manual shifting as shown in the table must be done. In case of a short circuit, the ECM stops sending the current to the short circuited solenoid.
Even if starting the engine in the fail-safe mode, the gear position remains in the same position.
HINT:
^ : Condition in the normal operation is shown above the arrow.
^ : Condition in the fail-safe mode is shown beneath the arrow.
^ E/B: Engine brake.
RENDER: 1.0x
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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.