Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS
PERFORM ACTIVE TEST USING GTS (MOTOR RELAY)
CHECK HARNESS AND CONNECTOR (+BM1/+BM2 TERMINAL)
CHECK HARNESS AND CONNECTOR (GND1, GND2 AND GND3 TERMINAL)
DTC C1253 Pump Motor Relay
DESCRIPTION
The motor relay (semiconductor relay) is built into the master cylinder solenoid and drives the pump motor based on a signal from the skid control ECU (master cylinder solenoid).
| DTC Code | DTC Detection Condition | Trouble Area |
| C1253 | There is a motor system circuit (motor input circuit) malfunction. | ABS1 fuse Motor relay circuit Skid control ECU (Master cylinder solenoid) |
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
| 1.PERFORM ACTIVE TEST USING GTS (MOTOR RELAY) |
Turn the ignition switch off.
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Start the engine.
Enter the following menus: Chassis / ABS/VSC/TRC / Active Test.
| Tester Display | Test Part | Control Range | Diagnostic Note |
| Motor Relay | Motor relay | Relay ON/OFF | An operating sound of the motor can be heard. |
Check the operating sound of the motor individually when operating it with the GTS.
- OK:
- An operating sound of the motor can be heard.
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| OK | |
| 2.RECONFIRM DTC |
Clear the DTCs ().
Turn the ignition switch off.
Depress the brake pedal more than 40 times.
Turn the ignition switch to ON.
Wait until the pump motor stops.
Depress the brake pedal several times until the pump motor turns on. (Procedure A)
Wait until the pump stops. (Procedure B)
Repeat the above steps (procedure A and B) 3 more times.
Check if the same DTC is output ().
- HINT:
- Reinstall the sensors, connectors, etc. and restore the previous vehicle conditions before rechecking for DTCs.
| Result | Proceed to |
| DTC is not output | A |
| DTC is output (for LHD) | B |
| DTC is output (for RHD) | C |
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| A | ||
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| 3.CHECK HARNESS AND CONNECTOR (+BM1/+BM2 TERMINAL) |
Turn the ignition switch off.
Disconnect the skid control ECU (master cylinder solenoid) connectors.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition A24-2 (+BM1) - Body ground Always 11 to 14 V A25-2 (+BM2) - Body ground Always 11 to 14 V
| *a | Front view of wire harness connector (to Skid Control ECU [Master Cylinder Solenoid]) |
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| OK | |
| 4.CHECK HARNESS AND CONNECTOR (GND1, GND2 AND GND3 TERMINAL) |
Turn the ignition switch off.
Disconnect the skid control ECU (master cylinder solenoid) connectors.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition A24-1 (GND1) - Body ground Always Below 1 Ω A24-32 (GND2) - Body ground Always Below 1 Ω A25-4 (GND3) - Body ground Always Below 1 Ω
| *a | Front view of wire harness connector (to Skid Control ECU [Master Cylinder Solenoid]) |
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| OK | |
| 5.RECONFIRM DTC |
Clear the DTCs ().
Turn the ignition switch off.
Depress the brake pedal more than 40 times.
Turn the ignition switch to ON.
Wait until the pump motor stops.
Depress the brake pedal several times until the pump motor turns on. (Procedure A)
Wait until the pump stops. (Procedure B)
Repeat the above steps (procedure A and B) 3 more times.
Check if the same DTC is output ().
- HINT:
- Reinstall the sensors, connectors, etc. and restore the previous vehicle conditions before rechecking for DTCs.
| Result | Proceed to |
| DTC is not output | A |
| DTC is output (for LHD) | B |
| DTC is output (for RHD) | C |
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| A | ||
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