Test Mode Procedure [08/2016 - ]

WARNING LIGHT AND INDICATOR LIGHT INITIAL CHECK

Release the parking brake.
NOTE:
Before releasing the parking brake, move the shift lever to P (for continuously variable transaxle) or use wheel chocks to secure the vehicle (for manual transaxle).

HINT:

When the parking brake is applied or the brake fluid level is low, the brake warning light comes on.

When the ignition switch is turned to ON, check that the ABS warning light, brake warning light, VSC OFF indicator light, multi-information display (TRAC OFF message) and slip indicator light come on for approximately 3 seconds.

HINT:

If the skid control ECU (brake actuator assembly) stores any DTCs, the ABS warning and slip indicator lights will come on.
If any of the indicators remain on or do not come on, proceed to troubleshooting for the light circuits listed below.

Trouble Area
ABS warning light circuit (Remains on)	Refer to ABS Warning Light Remains ON [08/2016 - ]
ABS warning light circuit (Does not come on)	Refer to ABS Warning Light does not Come ON [08/2016 - ]
Brake warning light circuit (Remains on)	Refer to Brake Warning Light Remains ON [08/2016 - ]
Brake warning light circuit (Does not come on)	Refer to Brake Warning Light does not Come ON [08/2016 - ]
VSC OFF indicator light circuit (Remains on)	Refer to VSC OFF Switch Circuit [08/2016 - ]
VSC OFF indicator light circuit (Does not come on)	Refer to VSC OFF Switch Circuit [08/2016 - ]
Slip indicator light circuit (Remains on)	Refer to Slip Indicator Light Remains ON [08/2016 - ]
Slip indicator light circuit (Does not come on)	Refer to Slip Indicator Light does not Come ON [08/2016 - ]

SENSOR CHECK USING TEST MODE (SIGNAL CHECK) (When Using Techstream)

HINT:

VSC does not operate in Test Mode (signal check), regardless of whether the sensor check is normal or abnormal.
When a malfunction occurs in an ABS system sensor, the ABS warning light illuminates.
When a malfunction occurs in a VSC system sensor, the slip indicator light illuminates.
When entering test mode, the skid control ECU (brake actuator assembly) communicates with the driving support ECU assembly to judge whether the vehicle is equipped with the pre-cllision system. Therefore, do not exit test mode within 5 seconds of entering test mode.

Procedure to enter Test Mode (signal check).

Turn the ignition switch off.
Apply the parking brake.
Check that the steering wheel is centered.
Check that the shift lever is in neutral (for manual transaxle).
Check that the shift lever is in P (for continuously variable transaxle).
Connect the Techstream to the DLC3.
Turn the ignition switch to ON and turn the Techstream on.

Enter the following menus: Chassis / ABS/VSC/TRAC / Utility / Signal Check.

Chassis > ABS/VSC/TRAC > Utility

Tester Display
Signal Check

HINT:

Signals related to the VSC system can be inspected by performing a Test Mode (signal check) inspection. During the inspection, the display of items determined normal by the skid control ECU (brake actuator assembly) changes from incomplete to complete.

Check that the ABS warning and slip indicator lights come on for several seconds and then blink in the Test Mode pattern.
HINT:

If the ABS warning and slip indicator lights do not blink, inspect the ABS warning and slip indicator light circuits.
Check the ABS sensors.
HINT:

Check that the ABS warning light is blinking in the Test Mode pattern before performing the following ABS sensor checks.

Acceleration Sensor Check
1. Keep the vehicle stationary on a level surface for 1 second or more.
  HINT:
  
  The acceleration sensor check can be performed with the master cylinder pressure sensor check below.
Master Cylinder Pressure Sensor Check
1. Start the engine.
2. Leave the vehicle in a stationary condition and release the brake pedal for 1 second or more, and quickly and continuously depress the brake pedal with a force of 98 N (10 kgf, 22 lbf) or more for 1 second.
3. Check that the ABS warning light stays on for 3 seconds.
  HINT:
  - Ensure that the ABS warning light comes on.
  - While the ABS warning light stays on, continue to depress the brake pedal with a force of 98 N (10 kgf, 22 lbf) or more.
  - The ABS warning light comes on for 3 seconds every time the brake pedal operation above is performed.
  - If the master cylinder pressure sensor check is not completed, depressing the brake pedal causes further decreases in vacuum in the brake booster, making the sensor check difficult to complete.
  - If the vacuum is insufficient, the master cylinder pressure sensor check may not be completed. In this case, run the engine at idle to obtain sufficient vacuum.
  - If the brake pedal is strongly depressed when the vacuum is insufficient, the brake warning light may come on in accordance with booster pressure control. In this case, run the engine at idle to obtain sufficient vacuum.
Speed Sensor Check
NOTE:
Before performing the speed sensor signal check, complete the acceleration sensor and master cylinder pressure sensor checks.
1. Start the engine.
2. Drive the vehicle straight ahead.
  Accelerate the vehicle to a speed of 45 km/h (28 mph) or more for several seconds and check that the ABS warning light goes off.
  - The sensor check may not complete if wheelspin occurs.
  - The ABS warning light blinks when the sensor check has been completed and the brake pedal is depressed.
  - The ABS warning light comes on immediately after a malfunction has been detected during the speed sensor check.
3. Stop the vehicle.
  NOTE:
  - The speed sensor check may not complete if the sensor check is started with the steering wheel turned or one or more wheels spinning.
  - After the ABS warning light goes off and if the vehicle speed exceeds 80 km/h (50 mph), a sensor check code will be stored again. Decelerate or stop the vehicle before the speed reaches 80 km/h (50 mph).
  - If the sensor check has not been completed, the ABS warning light blinks during driving and the ABS system does not operate.
  HINT:
  
  When the sensor check has been completed, the ABS warning light remains off during driving and blinks in the Test Mode (signal check) pattern while the vehicle is stationary.
VSC Sensor Check
HINT:

Check that the slip indicator light is blinking in the Test Mode pattern before performing the following VSC sensor check.
VSC OFF Switch (Combination Switch Assembly) Check
1. Press the VSC OFF switch (combination switch assembly).
2. Check that the VSC OFF indicator light comes on.
3. Press the VSC OFF switch (combination switch assembly) again.
End of Sensor Check
1. If the sensor check is completed, the ABS warning light and slip indicator light blink (Test Mode (signal check)) when the vehicle stops and the ABS warning light is off while the vehicle is being driven.
  NOTE:
  - When Test Mode (signal check) is started with the Techstream and all items display complete, the sensor check ends.
  - If the sensor check is not complete, the ABS warning light blinks when the vehicle is in motion and the ABS does not operate.
  - If a DTC is detected in Test Mode (signal check), the ABS warning light or slip indicator light illuminates.
End of Test Mode (Signal Check)
1. End Test Mode (signal check) using the Techstream
  1. Turn the ignition switch off and enter normal mode.
  2. Remove the Techstream.

Test Mode (Signal Check) Inspection Item Chart

Item Name	Range	Judgment Description	Trouble Area
Output Signal of Front Speed Sensor RH	Incomplete/complete	Check for foreign matter, check the gap between the sensor and rotor	Open or short in speed sensor Open or short in sensor system wire harness Defective connector contact or increased terminal resistance Speed sensor installation defect Sensor rotor system malfunction
Output Signal of Front Speed Sensor LH	Incomplete/complete	Check for foreign matter, check the gap between the sensor and rotor	Open or short in speed sensor Open or short in sensor system wire harness Defective connector contact or increased terminal resistance Speed sensor installation defect Sensor rotor system malfunction
Output Signal of Rear Speed Sensor RH	Incomplete/complete	Check for foreign matter, check the gap between the sensor and rotor	Open or short in speed sensor Open or short in sensor system wire harness Defective connector contact or increased terminal resistance Speed sensor installation defect Sensor rotor system malfunction
Output Signal of Rear Speed Sensor LH	Incomplete/complete	Check for foreign matter, check the gap between the sensor and rotor	Open or short in speed sensor Open or short in sensor system wire harness Defective connector contact or increased terminal resistance Speed sensor installation defect Sensor rotor system malfunction
Change in Output Signal of Front Speed Sensor RH	Incomplete/complete	Check the stability of the sensor input waveform	Foreign object attached to speed sensor Sensor rotor system malfunction
Change in Output Signal of Front Speed Sensor LH	Incomplete/complete	Check the stability of the sensor input waveform	Foreign object attached to speed sensor Sensor rotor system malfunction
Change in Output Signal of Rear Speed Sensor RH	Incomplete/complete	Check the stability of the sensor input waveform	Foreign object attached to speed sensor Sensor rotor system malfunction
Change in Output Signal of Rear Speed Sensor LH	Incomplete/complete	Check the stability of the sensor input waveform	Foreign object attached to speed sensor Sensor rotor system malfunction
Output Voltage Deceleration Sensor	Incomplete/complete	Check the acceleration sensor output voltage	Acceleration sensor zero point stored incorrectly Acceleration sensor (airbag sensor assembly) connector connection malfunction Acceleration sensor (airbag sensor assembly) internally stuck Defective acceleration sensor (airbag sensor assembly) installation
Memory System Information	Incomplete/complete	Check stored system information (skid control ECU (brake actuator assembly)) against vehicle specification	ECM incorrectly installed Brake actuator assembly incorrectly installed CAN communication between ECM and skid control ECU (brake actuator assembly)
Output Master Cylinder Pressure Sensor	Incomplete/complete	Check the master cylinder pressure sensor zero point voltage Check that the sensitivity of the master cylinder pressure sensor is normal	Open circuit or short in master cylinder pressure sensor circuit Open or short in stop light switch assembly circuit or defective connector connection Stop light switch assembly stuck OFF

SENSOR CHECK USING TEST MODE (SIGNAL CHECK) (When Using SST Check Wire)

HINT:

If the ignition switch is turned from ON to ACC or off during Test Mode (signal check), DTCs recorded during the sensor check will be cleared.
During Test Mode (signal check), the skid control ECU (brake actuator assembly) records all DTCs detected in the sensor check. By performing Test Mode (signal check), the codes are cleared as the normal condition for each item is confirmed. The remaining codes are the codes where an abnormality was found.
When entering test mode, the skid control ECU (brake actuator assembly) communicates with the driving support ECU assembly to judge whether the vehicle is equipped with the pre-cllision system. Therefore, do not exit test mode within 5 seconds of entering test mode.

Procedure to enter Test Mode (signal check)

Turn the engine switch off.
Check that the steering wheel is centered.
Apply the parking brake.
Check that the shift lever is in neutral (for manual transaxle).
Check that the shift lever is in P (for continuously variable transaxle or automatic transaxle).

Using SST, connect terminals TS and CG of the DLC3.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of DLC3

SST: 09843-18040

Turn the ignition switch to ON.
Check that the ABS warning and slip indicator lights come on for several seconds and then blink in the Test Mode pattern.
HINT:

If the ABS warning and slip indicator lights do not blink, inspect the TS and CG terminal circuit and ABS warning and slip indicator light circuits.
Check the ABS sensors.
HINT:

Check that the ABS warning light is blinking in the Test Mode pattern before performing the following ABS sensor checks.

Acceleration Sensor Check
1. Keep the vehicle stationary on a level surface for 1 second or more.
  HINT:
  
  The acceleration sensor check can be performed by following the master cylinder pressure sensor check procedure below.
Master Cylinder Pressure Sensor Check
1. Leave the vehicle in a stationary condition and release the brake pedal for 1 second or more, and quickly and continuously depress the brake pedal with a force of 98 N (10 kgf, 22.0 lbf) or more for 1 second.
2. Check that the ABS warning light stays on for 3 seconds.
  HINT:
  - Confirm that the ABS warning light comes on.
  - While the ABS warning light stays on, continue to depress the brake pedal with a force of 98 N (10 kgf, 22.0 lbf) or more.
  - The ABS warning light comes on for 3 seconds every time the preceding brake pedal operation is performed.
Speed Sensor Check
1. Drive the vehicle in reverse for more than 1 second at 3 km/h (2 mph) or more (Reverse signal check).
2. Check that the ABS warning light goes off.
  HINT:
  
  Drive the vehicle in reverse and check the speed sensor signal. Note that the signal check cannot be completed if the vehicle speed is 45 km/h (28 mph) or more.
3. Drive the vehicle straight-ahead.
  Accelerate the vehicle to a speed of 45 km/h (28 mph) or more for several seconds (Forward signal check).
  NOTE:
  - The speed sensor check may not complete if the speed sensor check is started while turning the steering wheel or spinning the wheels.
  - After the ABS warning light goes off, if vehicle speed exceeds 80 km/h (50 mph), a sensor check DTC will be stored again. Decelerate or stop the vehicle before the speed reaches 80 km/h (50 mph).
  HINT:
  - The sensor check may not complete if wheelspin occurs.
  - The ABS warning light comes on immediately if a malfunction is detected during the speed sensor check.
4. Check that the ABS warning light goes off.
  HINT:
  - The ABS warning light goes off when the sensor check has completed.
  - The ABS warning light comes on immediately after a malfunction has been detected during the speed sensor check.
5. Stop the vehicle.
  NOTE:
  If the sensor check has not completed, the ABS warning light will blink while the vehicle is being driven and the ABS will not operate.
  
  HINT:
  
  When the sensor check has completed, the ABS warning light goes off while the vehicle is being driven, and blinks in the Test Mode pattern while the vehicle is stopped.
VSC Sensor Check
HINT:

Check that the slip indicator light is blinking in the Test Mode pattern before performing the following VSC sensor check.
VSC OFF Switch (Combination Switch Assembly) Check
1. Press the VSC OFF switch (combination switch assembly).
2. Check that the VSC OFF indicator light comes on.
3. Press the VSC OFF switch (combination switch assembly) again.
End of Sensor Check
1. If the sensor checks have completed, the ABS warning light blinks in the Test Mode pattern when the vehicle is stopped and the ABS warning light goes off while the vehicle is being driven.
  NOTE:
  If the sensor checks have not completed, the ABS warning light will blink while the vehicle is being driven and the ABS will not operate.

Reading Sensor Check DTCs

*a	Front view of DLC3

Using SST, connect terminals TC and CG of the DLC3.
- SST: 09843-18040
Count the number of blinks of the ABS warning and slip indicator lights.
NOTE:
- If only DTCs other than Test Mode sensor check DTCs are displayed, repair the malfunctions and clear the DTCs.
- If Test Mode sensor check DTCs and other DTCs are displayed or if only Test Mode sensor check DTCs are displayed, repair the malfunctions, clear the DTCs, and perform Test Mode inspection again.
HINT:
- How to read DTCs:
  Diagnostic trouble codes are represented by the number of blinks of a warning light. For example, code 21 would be shown by 2 blinks, a pause of 1.5 seconds, and then 1 blink.
- If one code is detected:
  The light repeats the same code after a pause of 4 seconds.
- If multiple codes are detected:
  The light outputs one code after another with a 2.5-second pause between each code.
  
  When all codes have been output, there is a 4-second pause and then the light begins to output the codes again.
- If more than 1 malfunction is detected at the same time, the lowest numbered code will be displayed first.
- See "Sensor Check DTCs".
After performing the check, disconnect SST from terminals TS and CG, and TC and CG of the DLC3, and turn the engine switch off.
Turn the ignition switch to ON to cancel Test Mode.
HINT:
- If the ignition switch is not turned off and back to ON after SST is removed from the DLC3, the previous Test Mode will continue.
- If the ignition switch is turned back to ON with terminals TS and CG connected, the previous Test Mode will continue.

Sensor Check DTCs

ABS Sensor

DTC No.	Detection Item	Trouble Area
71	Low Output Signal of Front Speed Sensor RH	Sensor installation Front speed sensor RH (front axle hub sub-assembly RH)
72	Low Output Signal of Front Speed Sensor LH	Sensor installation Front speed sensor LH (front axle hub sub-assembly LH)
73	Low Output Signal of Rear Speed Sensor RH	Rear speed sensor RH Sensor installation Rear speed sensor rotor RH (rear axle hub and bearing assembly RH)
74	Low Output Signal of Rear Speed Sensor LH	Rear speed sensor LH Sensor installation Rear speed sensor rotor LH (rear axle hub and bearing assembly LH)
75	Abnormal Change in Output Signal of Front Speed Sensor RH	Front speed sensor rotor RH (front axle hub sub-assembly RH)
76	Abnormal Change in Output Signal of Front Speed Sensor LH	Front speed sensor rotor LH (front axle hub sub-assembly LH)
77	Abnormal Change in Output Signal of Rear Speed Sensor RH	Rear speed sensor rotor RH (rear axle hub and bearing assembly RH)
78	Abnormal Change in Output Signal of Rear Speed Sensor LH	Rear speed sensor rotor LH (rear axle hub and bearing assembly LH)
79	Acceleration Sensor Output Voltage Malfunction	Sensor installation Acceleration sensor (yaw rate and acceleration sensor)
81	Master Cylinder Pressure Sensor Output Malfunction	Stop light switch assembly Master cylinder pressure sensor (brake actuator assembly)

HINT:

The DTCs in this table are output only in Test Mode (signal check).