Electronic Neutral Check
ELECTRONIC NEUTRAL CHECKPreparation
NOTE:
^ If the power of the 4WS control unit was shut down for the following operations, start the engine and turn the steering wheel fully right and left.
- Battery removal/installation
- 4WS control unit removal/installation
- No.43 fuse CLOCK RADIO removal
^ Before performing the electronic neutral check on the 4WS system check the following items.
- Be sure that the steering wheel spoke angle is at the designated angle while driving straight.
- Be sure that the rear wheels are not steered to the right or left, but in the straight driving position.
Procedure
1. Jack up the car and place the four wheels slowly in the center of the turning radius gauge turn tables.
2. Place a piece of masking tape or equivalent approximately 300 mm (12.0 in) long on the top edge of the steering wheel. Place a mark on the tape at each of the following measurements:
^ Center (highest point of the steering wheel).
^ 9 mm (0.4 in) right and left of center (For front main steering angle sensor).
^ 18 mm (0.7 in) right and left of center (For front sub steering angle sensor adjustment).
^ 55 mm (2.2 in) right and left of center (For front sub steering angle sensor inspection).
NOTE: The specifications are the measurements on the outer circumference of the steering wheel.
3. Fashion a piece of stiff wire coat hanger) and place it on top of the steering column. Position the wire so the indicating tip is close to the marks on the steering wheel and tape the wire down securely.
4. Set the steering wheel in the straight driving position and set the wire at the center mark on the steering wheel.
5. Take out the service check connector (BW 2P) from behind the center console. Connect the terminals with a piece of jumper wire.
NOTE:
^ The 4WS indicator light will not indicate that sensors are in the neutral position when displaying stored problem codes.
^ Check and verify any problem codes displayed before checking the neutral position.
6. Pull up the parking brake lever fully and turn the ignition switch on (engine off) to turn the parking brake indicator light on. This sets the front sensors in the inspection mode.
Front sensors inspection
7. Check the main steering angle sensor with the ignition switch on (engine off).
- From the straight driving position, turn the steering wheel to the left, then turn the steering wheel slowly to the right beyond the straight driving position. Do not turn the steering wheel inversely.
- Turn the steering wheel to the right, then turn to the left beyond the straight driving position. Repeat this operation several times until you find the position where the 4WS indicator light starts to come on.
The 4WS indicator light should start to come on within the range of ±9 mm (±O.4 in/±3°) from the center mark on the steering wheel.
NOTE:
^ The 4WS indicator light might look as if it is blinking at a point near the ends of the specified range.
^ To determine that the indicator light is on and not blinking, be sure that the 4WS indicator light stays on for more than 2 seconds.
Adjust the 4WS system if the indicator light starts to come on at a point outside the marked range on the steering wheel.
8. Check the front sub steering angle sensor with the ignition switch on (engine off).
- From the straight driving position, turn the steering wheel to the right, then turn it slowly to the left beyond the straight driving position. Do not turn the steering wheel inversely.
- Turn the steering wheel to the left, then turn to the right beyond the straight driving position. Repeat this operation several times until you find the center point of the range where the 4WS indicator light blinks (at the intervals of 0.2 seconds).
The center point should be within the range of ±55 mm (±2.2 in, ±16.5°) from the center mark on the steering wheel.
After adjusting the front sub steering angle sensor, however, the center point should be within the range of ±18 mm (±0.7 in; ±5.5°) from the center mark.
If the center point is outside the marked range on the steering wheel, adjust the front sub steering angle sensor.
Rear sensors inspection
9. Release the parking brake fully to turn off the parking brake indicator light. This sets the rear sensors in the inspection mode.
10. Turn the ignition switch off.
11. Remove the cap bolt and sealing washer from the rear actuator, and screw the special tool into the rear actuator as far as it will go.
NOTE: Do not start the engine with the lock pin set in the rear actuator.
12. Set the steering wheel in the straight driving position to prevent the rear wheels from steering if the engine is started in error.
13. Turn the ignition switch on (engine off) to check the rear sub steering angle sensor.
- Turn the rear left wheel fully to the right by hand, then turn it slowly to the left.
- The 4WS indicator light should blink at intervals of 0.2 seconds when the rear wheel is turned to the left.
NOTE: The 4WS indicator light blinks in a narrow range. Take care not to overlook it.
If the 4WS indicator light does not blink, adjust the rear sub steering sensor.
14. Set the steering wheel in the straight driving position to prevent the rear wheels from steering if the engine is started in error.
15. Turn the ignition switch on (engine off) and check the rear main steering angle sensor.
- Turn the rear left wheel fully to the left by hand, then turn it slowly to the right.
- The 4WS indicator light should turn ON when the rear wheel is turned to the right.
NOTE:
^ The 4WS indicator light turns on in a narrow range. Take care not to overlook it.
^ The 4WS indicator light might look as if it is blinking at a point near the ends of the range where the light is on.
^ To determine that the indicator light is not blinking, be sure that the 4WS indicator light stays on for more than 2 seconds.
^ If the 4WS indicator light does not turn on, remove the rear main steering angle sensor and check it for damage.
16. Turn the ignition switch off.
17. Remove the special tool from the rear actuator, and install the cap bolt and the new sealing washer on the rear actuator.
18. Remove the jumper wire from the service check 2P connector terminals.
19. Return the connector behind the center console.
20. Reinstall the removed parts.