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 MANUALSTOYOTA2011LANDCRUISER V8-5.7L (3UR-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTTRANSMISSION CONTROL SYSTEMSTESTING AND INSPECTIONINITIAL INSPECTION AND DIAGNOSTIC OVERVIEWFAIL-SAFE CHART
2011 Toyota Landcruiser V8-5.7L (3UR-FE)
Fail-Safe Chart
2011 Toyota Landcruiser V8-5.7L (3UR-FE)SECTION Fail-Safe Chart
AB60F AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSMISSION SYSTEM: FAIL-SAFE CHART
1. Fail-safe
This function minimizes the loss of the ECT functions when a malfunction occurs in each sensor or solenoid.
2. Fail-safe Control List
HINT
*: In addition to the switching of the shift pattern through the pattern select switch, Artificial Intelligence Shift (AI-SHIFT) control enables the ECM to estimate the road conditions and the driver intention in order to automatically select the optimal shift pattern.
Shift Solenoid Valve Normal Operation Chart
(a) Fail-safe operation for electronically malfunctioning shift solenoid valve (S1, S2, S3, S4 and SR).
(1) Fail-safe function
If any of the shift solenoid valve circuits has an open or short failure, the ECM turns the other shift solenoid valves "ON" and "OFF" in order to shift into the gear positions shown in the table below. Also, the ECM stops sending current to the open or short circuited solenoid.
Even if starting the engine again in the fail-safe mode, the gear position remains in the same position.
HINT
* *: Actual gear shift (gear position) under fail-safe operation.
* X: OFF (the ECM stops sending current to the malfunctioning shift solenoid valve).
* Electrical malfunction: Condition is shown to the left of the "->".
* Fail-safe mode: Condition is shown to the right of the "->".
* E/B: Engine brake
Shift Solenoid Valve S1 Electrical Malfunction (P0973, P0974)
Shift Solenoid Valve S2 Electrical Malfunction (P0976, P0977)
Shift Solenoid Valve S3 Electrical Malfunction (P0979, P0980)
Shift Solenoid Valve S4 Electrical Malfunction (P0982, P0983)
Shift Solenoid Valve SR Electrical Malfunction (P0985, P0986)
(b) Fail-safe operation in the event of a mechanical system malfunction.
(1) Fail-safe function
The ECM controls the gear position as shown in the table below when malfunctions occur.
HINT
* *1: Actual gear shift (gear position) under fail-safe operation.
* *2: Under engine braking, downshifting to 1st or 2nd gear is prohibited.
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.