DTC C1253/53 Hydro Booster Pump Motor Relay Malfunction: Description
WARNING: This page is about a different car, the 2007 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
The ABS MTR 1 relay and ABS MTR 2 relay supply power to the hydraulic brake booster pump motor. While the ABS & BA & TRAC & VSC are activated, the ECU switches the motor relay ON and operates the hydraulic brake booster pump motor.
DATA LIST REFERENCE
| DTC No. |
DTC Detection Condition |
Trouble Area |
| C1253/53 |
When any of the following 1. through 4. is detected.
- After turning the ignition switch ON, open in the relay coil is detected for more than 1 sec.
- When the pressure switch does not control motor driving, the condition that the motor relay is always ON continues for more than 1 sec. due to short circuit.
- When the pressure switch (PH) detects the low pressure or while the pump motor operates to increase the pressure, the condition that the motor relay does not turn ON continues for more than 0.2 sec.
- When pressure switch does not control motor driving, the condition that the motor relay is always ON due to the welded contact continues for more than 2 sec.
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- ABS MTR 1 or ABS MTR 2 relay
- ABS MTR 1 or ABS MTR 2 relay circuit
- Hydraulic brake booster pump motor circuit
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