ANTI-LOCK BRAKE SYSTEM - TEST MODE PROCEDURE

NOTICE:

After replacing the master cylinder solenoid and/or deceleration sensor, perform calibration.

HINT:

By switching the skid control ECU (master cylinder solenoid) 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 are not cleared. During test mode, do not change to normal mode.

During test mode, the skid control ECU (master cylinder solenoid) 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.

TEST MODE (SIGNAL CHECK) PROCEDURE

When using the GTS:

Place the vehicle on a level surface with an inclination of less than 1%.

Turn the ignition switch off.

Check that the shift lever is in P.

CAUTION:

Apply the parking brake for safety.

Connect the GTS to the DLC3.

Turn the ignition switch to ON.

Turn the GTS on.

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

Check that the ABS warning light blinks at 0.125 second intervals (0.125 seconds on and 0.125 seconds off).

Start the engine.

When using SST check wire:

Place the vehicle on a level surface with an inclination of less than 1%.

Turn the ignition switch off.

Check that the shift lever is in P.

CAUTION:

Apply the parking brake for safety.

Anti-Lock Brake System - Test Mode Procedure. BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Using SST, connect terminals 12 (TS) and 4 (CG) of the DLC3.

SST
09843-18040

Text in Illustration
*a	Front view of DLC3

Turn the ignition switch to ON.

Check that the ABS warning light blinks at 0.125 second intervals (0.125 seconds on and 0.125 seconds off).

Start the engine.

ABS Signal Check

HINT:

Check that the ABS warning light is blinking in the test mode blinking pattern (0.125 seconds on and 0.125 seconds off) before performing the ABS signal check.

Master Cylinder Pressure Sensor and Deceleration Sensor Check

Keep the vehicle stationary on a level surface for 1 second or more.

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.

Check that the ABS warning light comes on for 3 seconds.

HINT:

During test mode, the ABS warning light turns on for 3 seconds every time the above operation is performed.

Center Differential Lock Detection Switch Check

Press the center differential lock switch to lock the center differential.

HINT:

Move the vehicle either forward or backward a little to engage the center differential lock.

Press the center differential lock switch to unlock the center differential.

Speed Sensor Check

NOTICE:

Before performing the speed sensor signal check, complete the master cylinder pressure sensor check.

The signal check may not be completed if the wheels of the vehicle spin or the steering wheel is turned during this check.

Drive the vehicle straight forward at a speed of 45 km/h (28 mph) or more for several seconds (forward signal check).

Check that the ABS warning light goes off.

Drive the vehicle in reverse for more than 1 second at 3 km/h (2 mph) or more (reverse signal check).

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 wheelspin occurs.

The ABS warning light blinks when the sensor check is 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.

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 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.

End of Signal Check

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 is not completed, the ABS warning light blinks while driving and the ABS does not operate.

Read test mode (signal check) DTCs (when using the GTS).

Read the DTC(s) by following the GTS screen.

NOTICE:

If only DTCs other than test mode signal check DTCs are output, repair the malfunctions and clear the DTCs.

If test mode signal 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.

Turn the ignition switch off and disconnect the GTS.

Read test mode (signal check) DTCs (when using SST check wire).

Using SST, connect terminals 13 (TC), 12 (TS) and 4 (CG) of the DLC3.

SST
09843-18040

Text in Illustration
*a	Front view of DLC3

Read the number of blinks of the ABS warning 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.

Disconnect SST from terminals 13 (TC), 12 (TS) and 4 (CG) of the DLC3.

LIST OF TEST MODE (SIGNAL CHECK) DTC

Test Mode DTC
DTC Code		Detection Item	Trouble Area
GTS Display	ABS Warning Light Display	Detection Item	Trouble Area
C1271	71	Front Speed Sensor RH Output Voltage Malfunction	Front speed sensor RH Sensor installation Speed sensor rotor (Front axle with ABS rotor bearing assembly RH)
C1272	72	Front Speed Sensor LH Output Voltage Malfunction	Front speed sensor LH Sensor installation Speed sensor rotor (Front axle with ABS rotor bearing assembly LH)
C1273	73	Rear Speed Sensor RH Output Voltage Malfunction	Rear speed sensor RH Sensor installation Speed sensor rotor (Rear axle hub & bearing assembly RH)
C1274	74	Rear Speed Sensor LH Output Voltage Malfunction	Rear speed sensor LH Sensor installation Speed sensor rotor (Rear axle hub & bearing assembly LH)
C1275	75	Abnormal Change in Output Signal of Front Speed Sensor RH	Front speed sensor RH Speed sensor rotor (Front axle with ABS rotor bearing assembly RH)
C1276	76	Abnormal Change in Output Signal of Front Speed Sensor LH	Front speed sensor LH Speed sensor rotor (Front axle with ABS rotor bearing assembly LH)
C1277	77	Abnormal Change in Output Signal of Rear Speed Sensor RH	Rear speed sensor RH Speed sensor rotor (Rear axle hub & bearing assembly RH)
C1278	78	Abnormal Change in Output Signal of Rear Speed Sensor LH	Rear speed sensor LH Speed sensor rotor (Rear axle hub & bearing assembly LH)
C1279	79	Deceleration sensor Output Voltage Malfunction	Sensor installation Harness or connector Deceleration sensor
C1281	81	Master Cylinder Pressure Sensor Output Malfunction	Master cylinder solenoid (Master cylinder pressure sensor)
C1282	82	Center Differential Lock Position Switch Malfunction	Harness or connector Transfer system

Anti-Lock Brake System - Test Mode Procedure

Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS

ANTI-LOCK BRAKE SYSTEM - TEST MODE PROCEDURE