The "AFS off" indicator is on

Hi,

First, make sure it isn't turned off at the switch. If it isn't, then try the initialization process to see if it resets. Here are the directions. The attached pics correlate with the directions. Try this. If it doesn't help, there is actually an AFS module that will need checked.

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2005 Lexus Truck RX 330 AWD V6-3.3L (3MZ-FE)
Initialization
Vehicle Lighting and Horns Testing and Inspection Programming and Relearning Lighting System Initialization
INITIALIZATION
INITIALIZATION

1. AFS ECU INITIALIZATION

NOTE: Steering neutral point automatic correction (AFS ECU INITIALIZATION) is necessary under the following condition.
- Disconnecting the battery.
- Replacing the steering sensor or AFS ECU.

A. Run the vehicle on the place where few curve or traffic congestion exist at least 100 m at the speed between 20 km/h (12 mph) and 80 km/h (48 mph).

HINT:
- Steering neutral point correction begins automatically when starting the engine immediately after installing the battery.
- Steering neutral point correction is automatically performed by vehicle running. AFS operation is prohibited when steering neutral point automatic correction is not performed or during automatic correction.
- AFS operation restarts when steering neutral point automatic correction is completed normally.

Step 1 - 2

see pic 1

Step 2 (Continued) - 3

see pic 2

2. AFS ECU RE-INITIALIZATION (WHEN NOT USING HAND-HELD TESTER)

NOTE: This operation manually initializes the steering sensor when AFS operation is not normal due to abnormal automatic correction after completion of AFS INITIALIZATION.

HINT:
- If it is necessary to initialize the steering sensor when not disconnecting the battery, it is also possible to re-set the signal from the steering sensor.
- When the centering point memorized in the steering sensor differs from the normal point, the AFS ECU malfunctions. In the case, re-initialize it.
- If the operation does not finishes within a specified time period, the system goes off the AFS indicator lamp and starts steering neutral point automatic correction.

3. AFS ECU RE-INITIALIZATION (WHEN USING HAND-HELD TESTER)

NOTE: This operation manually initializes the steering sensor when AFS operation is not normal due to abnormal automatic correction after completion of AFS INITIALIZATION.

HINT:
- If it is necessary to initialize the steering sensor when not disconnecting the battery, it is also possible to re-set the signal from the steering sensor.
- When the centering point memorized in the steering sensor differs from the normal point, the AFS ECU malfunctions. In the case, re-initialize it.
- If the operation does not finishes within a specified time period, the system goes off the AFS indicator lamp and starts steering neutral point automatic correction.

A. Connect the hand-held tester to the DLC3.
B. Turn the ignition switch to the ON position and press the hand-held tester main switch ON.
C. Select "STEER SENS INIT" on "DIAGNOSTICS MENU AFS" display.
D. Turn the steering wheel with the engine starting until the tires face straight ahead, and press "ENTER".
E. Check "CONFIRM" display and press "YES".

NOTE: Do not turn the steering wheel while initializing and keep the tires facing straight ahead.

F. Check the display for completion of the operation.

HINT: If the operation above cannot be completed after several attempts, a malfunction in the steering sensor circuit is suspected.

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I hope this helps. Let me know if you have other questions.

Take care,
Joe