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Test Mode Procedure








BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: TEST MODE PROCEDURE

TEST MODE PROCEDURE

1. TEST MODE PROCEDURE (for Using a Techstream)
HINT:
- After replacing the yaw rate and deceleration sensor, be sure to clear the zero point calibration data in the skid control ECU and perform zero point calibration.
- If the ignition switch is turned from ON to ACC or LOCK position during test mode, DTCs related to the signal check function will be erased.
- During test mode, the skid control ECU records all DTCs related to the signal check function. By performing the signal check, the codes are erased if normality is confirmed. The codes left over are the codes where an abnormality was found.

(a) Turn the ignition switch off.
(b) Check that the steering wheel is in the straight-ahead position.
(c) Automatic transmission: Check that the shift lever is in the P position and apply the parking brake.
Manual transmission: Check that the shift lever is in neutral and apply the parking brake.
(d) Connect the Techstream to the DLC3.
(e) Start the engine.
(f) Switch the ECU to test mode using the Techstream. Select the following menu items: Chassis / ABS/VSC/TRAC / Signal Check





(g) Check that the ABS warning light and SLIP indicator light blink as shown in the illustration.
HINT: If the ABS warning light and SLIP indicator light do not blink, inspect the ABS warning light circuit and SLIP indicator light circuit.





(h) Activate the ABS sensors (deceleration sensor, master cylinder pressure sensor, 4WD detection switch, L4 detection switch and speed sensor) and VSC sensor (yaw rate and deceleration sensor) in test mode (SIGNAL CHECK) using a Techstream.
2. TEST MODE PROCEDURE (for Using SST Check Wire)
HINT:
- After replacing the yaw rate and deceleration sensor, be sure to clear the zero point calibration data in the skid control ECU and perform zero point calibration.
- If the ignition switch is turned from ON to ACC or LOCK position during test mode, DTCs relating to the signal check function will be erased.
- During test mode, the skid control ECU records all DTCs relating to the signal check function. By performing the signal check, the codes are erased if normality is confirmed. The remaining codes are those indicating where an abnormality was found.

(a) Turn the ignition switch off.
(b) Check that the steering wheel is in the straight-ahead position.
(c) Automatic transmission: Check that the shift lever is in the P position and apply the parking brake.
Manual transmission: Check that the shift lever is in neutral and apply the parking brake.





(d) Using SST, connect terminals TS and CG of the DLC3.
SST: 09843-18040

(e) Start the engine.





(f) Check that the ABS warning light and SLIP indicator light blink as shown in the illustration.
HINT: If the ABS warning light and SLIP indicator light do not blink, inspect the TS and CG terminal circuit, the ABS warning light circuit and SLIP indicator light blink circuit.





(g) Activate the ABS sensors (deceleration sensor, master cylinder pressure sensor, 4WD detection switch, L4 detection switch and speed sensor) and VSC sensor (yaw rate and deceleration sensor) in test mode (SIGNAL CHECK) using a check wire.
3. DECELERATION SENSOR SIGNAL CHECK
(a) Keep the vehicle stationary on a level surface for 1 second or more.
HINT: The ABS warning light continues blinking at this time.

4. MASTER CYLINDER PRESSURE SENSOR CHECK
(a) Keep the vehicle stationary and release the brake pedal for 1 second or more, and quickly depress the brake pedal with a force of 98 N (10 kgf) or more for 1 second or more.
(b) Check that the ABS warning light comes on for 3 seconds.
HINT:
- While the ABS warning light stays on, continue to depress the brake pedal with a force of 98 N (10 kgf) or more.
- The ABS warning light comes on for 3 seconds every time the above brake pedal operation is performed.

5. 4WD DETECTION SWITCH SIGNAL CHECK (for 4WD models)
(a) Manual transmission:
(1) Move the transfer high and low shift lever to HL or HH to lock the center differential.
(2) Move the transfer high and low shift lever to H to unlock the center differential.
(b) Automatic transmission:
(1) Move the transfer high and low shift lever to H4 or L4 to put the vehicle in 4WD mode.
(2) Move the transfer high and low shift lever to H2 to put the vehicle in 2WD mode.
6. L4 DETECTION SWITCH SIGNAL CHECK (for 4WD models of Automatic Transmission)
(a) Move the transfer high and low shift lever to the L4 position.
(b) Move the transfer high and low shift lever to H2 or H4.
HINT: Move the vehicle either a little forward or a little backward to engage the L4 position.

7. SPEED SENSOR CHECK
(a) Check the reverse signal.
(1) Drive the vehicle straight rearward at a speed of 2 mph (3 km/h) or more for 1 second or more.
NOTE: At this time, if the vehicle speed exceeds 28 mph (45 km/h), a signal check code will be stored again. Decelerate or stop the vehicle before the speed reaches 28 mph (45 km/h).

(b) Check the forward signal.
(1) Drive the vehicle straight forward at a speed of 28 mph (45 km/h) or more.
(c) Check that the ABS warning light goes off.
NOTICE:
- Before performing the speed sensor signal check, complete the deceleration sensor, master cylinder pressure sensor, 4WD detection switch and L4 detection switch signal checks.
- The speed sensor signal check may not be completed if the speed sensor signal check is started while turning the steering wheel or spinning the wheels.
- After the ABS warning light goes off, if the vehicle speed exceeds 28 mph (45 km/h), a signal check code will be stored again. Decelerate or stop the vehicle before the speed reaches 28 mph (45 km/h).
- If the signal check has not been completed, the ABS warning light blinks while driving and the ABS system does not operate.





(d) Stop the vehicle.
HINT: When the signal check has been completed, the ABS warning light goes off while driving and blinks in test mode while stationary.

8. READ DTC OF ABS SENSOR (for Using a Techstream)
(a) Read the DTC(s) by following the tester screen.
HINT: Refer to the Techstream operator's manual for further details.

9. READ DTC OF ABS SENSOR (for Using SST Check Wire)
(a) Using SST, connect terminals TC and CG of the DLC3.
SST: 09843-18040
(b) Turn the ignition switch to ON.
(c) Read the number of blinks of the ABS warning light.
- If every sensor is normal, the normal code is displayed (A cycle of 0.25 seconds ON and 0.25 seconds OFF is repeated).




- If 2 or more malfunctions are detected at the same time, the lowest numbered DTC is displayed first.





(d) After the check, disconnect the SST from terminals TC and CG of the DLC3.
(e) Turn the ignition switch off.
10. VSC OFF SWITCH CHECK
(a) for 4WD Vehicle
(1) Press the VSC OFF switch.
(2) Check that the VSC OFF indicator light come on.
(3) Press the VSC OFF switch again to turn the VSC OFF indicator off.
(b) for 2WD Vehicle
(1) Press the VSC OFF switch.
(2) Check that the VSC OFF and AUTO LSD indicator lights comes on.
(3) Press the VSC OFF switch again to turn the VSC OFF and AUTO LSD indicator lights off.
11. A-TRAC SWITCH CHECK (for vehicles with A-TRAC)
(a) Press the A-TRAC switch.
(b) Check that the A-TRAC indicator light comes on.
(c) Press the A-TRAC switch again to turn the A-TRAC indicator off.
12. YAW RATE SENSOR CHECK
(a) Keep the vehicle stationary on a level surface for 1 second or more.





(b) Shift the shift lever to the D position (Automatic transmission) and drive the vehicle at a speed of approximately 3 mph (5 km/h), turn the steering wheel either to the left or right 90° or more, and turn the vehicle through 180 degrees.

(c) Automatic transmission: Stop the vehicle, check that the shift lever is in the P position, and then apply the parking brake.
Manual transmission: Stop the vehicle, check that the shift lever is in neutral, and then apply the parking brake.
(d) Check that the skid control (VSC warning) buzzer sounds for 3 seconds.
HINT:
- If the skid control (VSC warning) buzzer sounds, the signal check has been completed normally.
- If the skid control (VSC warning) buzzer does not sound, check the skid control buzzer circuit [1][2]Component Tests and General Diagnostics, and then perform the signal check again.
- If the skid control (VSC warning) buzzer still does not sound, there is a malfunction in the yaw rate sensor, so check the DTC.
- Drive the vehicle in a 180° semi circle. At the end of the turn, the direction of the vehicle should be within 180+-5° of its start position.
- The vehicle turn should be completed within 20 seconds.
- Do not spin the wheels.

13. READ DTC OF VSC SENSOR (for Using a Techstream)
(a) Read the DTC(s) by following the tester screen.
- Refer to the Techstream operator's manual for further details.

14. READ DTC OF VSC SENSOR (for Using SST Check Wire)
(a) Using SST, connect terminals TC and CG of the DLC3.
SST: 09843-18040
(b) Turn the ignition switch to ON.
(c) Read the number of blinks of the SLIP indicator light.
- If every sensor is normal, the normal code is displayed (A cycle of 0.25 seconds ON and 0.25 seconds OFF is repeated).




- If 2 or more malfunctions are detected at the same time, the lowest numbered DTC is displayed first.





(d) After the check, disconnect the SST from terminals TC and CG of the DLC3.
(e) Turn the ignition switch off.
15. DTC OF SIGNAL CHECK FUNCTION

ABS sensor





HINT:
- *1: 4WD only
- *2: 4WD with Automatic Transmission

VSC sensor





HINT: The codes in this table are output only in test mode (signal check).
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