Test Mode Procedure
BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: TEST MODE PROCEDURE
NOTICE:
* After replacing the master cylinder solenoid and/or yaw rate and acceleration 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.
(3) Check that the shift lever is in P.
(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.
(3) Check that the shift lever is in P.
(4) Using SST, connect terminals 12 (TS) and 4 (CG) of the DLC3.
SST : 09843-18040
(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 Acceleration 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 Part-time 4WD)
(1) Move the transfer shift lever to H4 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 Full-time 4WD)
(1) Set the transfer position switch to the H4L position to lock the center differential.
HINT
Move the vehicle either forward or backward a little to lock the center differential.
(2) Set the transfer position switch to the H4F position to unlock the center differential.
(g) 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 goes 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 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.
NOTICE:
* The sensor check may not be completed if wheel spin 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 while driving and the ABS does not operate.
HINT
When the signal check is completed, the ABS warning light goes off while driving and blinks in the test mode pattern while stationary.
(h) 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.
(i) Downhill Assist Control Switch Check (w/ Downhill Assist Control)
(1) Push the downhill assist control switch and check that the downhill assist control indicator light is blinking.
(2) Turn the downhill assist control switch off.
(j) Crawl Switch Check (w/ Crawl Control)
(1) Push the crawl ON/OFF switch and check that the crawl indicator light is on while the switch is being pushed.
(2) Turn the crawl ON/OFF switch off.
(3) Turn the speed selector switch to L (low).
(4) Turn the speed selector switch to medium-low.
(5) Turn the speed selector switch to M (medium).
(6) Turn the speed selector switch to medium-high.
(7) Turn the speed selector switch to H (high).
(8) Turn the speed selector switch to L (low).
(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) Yaw Rate Sensor Check
(1) Move the shift lever from P to D and drive the vehicle at a vehicle speed of 5 km/h (3 mph) or more, and then turn the steering wheel either to the left or right 90° or more until the vehicle makes a 180° turn.
NOTICE:
* Do not spin the wheels.
* Complete the turn within 20 seconds.
* Do not turn the ignition switch off while turning.
* Do not move the shift lever to P while turning. Changing the vehicle speed, stopping, or driving in reverse is possible.
(2) Stop the vehicle and move the shift lever to P. Check that the skid control buzzer sounds for 3 seconds.
HINT
* If the skid control buzzer sounds, the signal check is completed normally.
* If the skid control 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 buzzer still does not sound, there is a malfunction in the yaw rate and acceleration sensor. Therefore, check for DTCs.
(n) 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 goes off while driving the vehicle.
NOTICE:
If the signal check has not been completed, the ABS warning light blinks while driving and the ABS does not operate.
(o) 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.
(p) 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
(2) Read the number of blinks of the ABS warning light and slip indicator light.
HINT
* If every sensor is normal, the normal code is output (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 output first.
(3) Disconnect SST from terminals 13 (TC), 12 (TS) and 4 (CG) of the DLC3.
2. LIST OF TEST MODE (SIGNAL CHECK) DTC
*: for 4WD
*: w/ Downhill Assist Control or w/ Crawl Control