Test Mode Procedure
BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: TEST MODE PROCEDURE
NOTICE:
* After replacing the master cylinder solenoid and/or yaw rate and deceleration sensor, perform calibration.
* VSC is prohibited during test mode.
HINT
* By switching the skid control ECU from normal mode to test mode, abnormality detection sensitivity is enhanced and troubleshooting can be conducted efficiently.
* Perform a sensor check in test mode after the speed sensor or sensor rotor has been repaired or replaced.
* If the ignition switch is turned from ON to ACC or off during test mode, DTCs related to the signal check function will not be cleared. During test mode, do not change to normal mode.
* During test mode, the skid control ECU stores all DTCs related to the signal check function, and the DTCs are cleared if normality is confirmed. Any remaining DTCs indicate abnormalities that were found.
1. TEST MODE (SIGNAL CHECK) PROCEDURE
(a) When using the Techstream:
(1) Place the vehicle on a level surface with an inclination of less than 1%.
(2) Turn the ignition switch off.
* for Automatic Transmission:
Check that the shift lever is in P.
* for Manual Transmission:
Check that the shift lever is in N and apply the parking brake.
(4) Connect the Techstream to the DLC3.
(5) Turn the ignition switch to ON.
(6) Turn the Techstream on.
(7) Enter the following menus: Chassis / ABS/VSC/ TRAC / Utility / Signal Check.
(8) Check that the ABS warning light and slip indicator light blink at 0.125 second intervals (0.125 seconds on and 0.125 seconds off).
(9) Start the engine.
(b) When using SST check wire:
(1) Place the vehicle on a level surface with an inclination of less than 1%.
(2) Turn the ignition switch off.
* for Automatic Transmission:
Check that the shift lever is in P.
* for Manual Transmission:
Check that the shift lever is in N and apply the parking brake.
(4) Using SST, connect terminals 12 (TS) and 4 (CG) of the DLC3.
SST : 09843-18040
Text in Illustration
(5) Turn the ignition switch to ON.
(6) Check that the ABS warning light and slip indicator light blink at 0.125 second intervals (0.125 seconds on and 0.125 seconds off).
(7) Start the engine.
(c) ABS Signal Check
HINT
Check that the ABS warning light is blinking in the test mode blinking pattern before performing the ABS signal check.
(d) Master Cylinder Pressure Sensor and Deceleration Sensor Check
(1) Keep the vehicle stationary on a level surface for 1 second or more.
(2) With the vehicle stationary, release the brake pedal for 1 second or more, and then quickly 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 comes on for 3 seconds.
HINT
During test mode, the ABS warning light will turn on for 3 seconds every time the above operation is performed.
(e) 4WD Detection Switch Check (for Automatic Transmission)
(1) Move the transfer shift lever to H4 or L4 to put the vehicle into four-wheel drive.
HINT
Move the vehicle either forward or backward a little to engage 4WD.
(2) Move the transfer shift lever to H2 to put the vehicle into two-wheel drive.
(f) Center Differential Lock Detection Switch Check (for Manual Transmission)
(1) Move the transfer shift lever to HL or LL to lock the center differential.
HINT
Move the vehicle either forward or backward a little to lock the center differential.
(2) Move the transfer shift lever to H to unlock the center differential.
(g) L4 Detection Switch Signal Check (for Automatic Transmission)
(1) Move the transfer shift lever to the L4 position.
(2) Move the transfer shift lever to H2 or H4.
HINT
Move the vehicle either a little forward or a little backward to engage the L4 position.
(h) LL Detection Switch Signal Check (for Manual Transmission)
(1) Move the transfer shift lever to the LL position.
(2) Move the transfer shift lever to H or HL.
HINT
Move the vehicle either a little forward or a little backward to engage the LL position.
(i) Speed Sensor Check
NOTICE:
* Before performing the speed sensor signal check, complete the master cylinder pressure sensor checks.
* The signal check may not be completed if the wheels of the vehicle spin or the steering wheel is turned during this check.
(1) Drive the vehicle straight forward at a speed of 45 km/h (28 mph) or more for several seconds (forward signal check).
(2) Check that the ABS warning light turns off.
(3) Drive the vehicle in reverse for more than 1 second at 3 km/h (2 mph) or more (reverse signal check).
(4) Check that the ABS warning light turns 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.
NOTICE:
* The sensor check may not be completed 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.
(5) Stop the vehicle.
NOTICE:
* 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.
* If the signal check is not been completed, the ABS warning light blinks during driving and the ABS does not operate.
HINT
When the signal check is completed, the ABS warning light turns off during driving and blinks in the test mode pattern while the vehicle is stationary.
(j) VSC Signal check
HINT
Check that the slip indicator light is blinking in the test mode blinking pattern (0.125 seconds on and 0.125 seconds off) before performing the VSC signal check.
(k) VSC OFF Switch Check (for 2WD)
(1) Press the VSC OFF switch.
(2) Check that the AUTO LSD indicator light and VSC OFF indicator light come on.
(3) Press the VSC OFF switch again to turn the AUTO LSD indicator light and VSC OFF indicator light off.
(l) VSC OFF Switch Check (for 4WD)
(1) Press the VSC OFF switch.
(2) Check that the VSC OFF indicator light comes on.
(3) Press the VSC OFF switch again to turn the VSC OFF indicator off.
(m) End of Signal Check
(1) If the signal check is completed, the ABS warning light blinks (0.125 seconds on and 0.125 seconds off) when the vehicle is stopped and turns off while driving the vehicle.
NOTICE:
If the signal check has not been completed, the ABS warning light blinks during driving and the ABS does not operate.
(n) Read test mode (signal check) DTCs (when using the Techstream)
(1) Read the DTC(s) by following the Techstream screen.
NOTICE:
* If only DTCs other than test mode sensor check DTCs are output, repair the malfunctions and clear the DTCs.
* If test mode sensor check DTCs and other DTCs are output or if only test mode sensor check DTCs are output, repair the malfunctions, clear the DTCs, and perform the test mode inspection again.
HINT
Refer to Signal Check DTCs.
(2) Turn the ignition switch off and disconnect the Techstream.
(o) Read test mode (signal check) DTCs (when using SST check wire)
(1) Using SST, connect terminals 13 (TC), 12 (TS) and 4 (CG) of the DLC3.
SST : 09843-18040
Text in Illustration
(2) Read the number of blinks of the ABS warning light and slip indicator light.
HINT
* When the system is operating correctly, each light will blink continuously in a pattern of 0.25 seconds on, then 0.25 seconds off.
* When one DTC is output, each light will output the same code at 4 second intervals. (For example, Code 21 would be output as 2 flashes, a 1.5 second pause, and then 1 flash)
* When 2 or more DTCs are output, each light will output a different code at 2.5 second intervals, and when all codes have been output, there will be a 4 second pause and the sequence will repeat.
* When multiple codes are set, they are output in order starting with the lowest DTC number.
(3) Disconnect SST from terminals 13 (TC), 12 (TS) and 4 (CG) of the DLC3.
2. LIST OF TEST MODE (SIGNAL CHECK) DTC
ABS sensor
* *1: for 4WD
* *2: for Automatic Transmission
* *3: for Manual Transmission