The ABS motor relay is built into the brake actuator assembly.
When the skid control ECU (brake actuator assembly) operates ABS, TRC, VSC, brake hold or brake assist, the ABS motor relay turns ON and drives the motor pump built into the brake actuator assembly.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | DTC Output from | Note |
|---|---|---|---|---|---|---|
| C052C11 | ABS Pump Motor Control Circuit Short to Ground | When the voltage at terminal +BM is between 9.6 and 16.4 V, a short to ground in the ABS motor drive circuit is detected during the self-test. | Skid control ECU (brake actuator assembly) | Comes on | Brake/EPB | ·
SAE Code: C052E (Case 1) ·
Output ECU: Skid control ECU (brake actuator assembly) |
| C052C13 | ABS Pump Motor Control Circuit Open | An open in the ABS motor drive circuit is detected during the self-test. | Skid control ECU (brake actuator assembly) | Comes on | Brake/EPB | ·
SAE Code: C052C (Case 3 and 6) ·
Output ECU: Skid control ECU (brake actuator assembly) |
| C052F14 | ABS Pump Motor Supply Voltage Circuit Short to Ground or Open | ·
When the pump motor is turned off after operating, 0.6 V or more is detected at the pump motor for 0.48 seconds or more. ·
The power supply of the ABS motor relay is less than 5 V for 0.15 seconds or more. |
Skid control ECU (brake actuator assembly) | Comes on | Brake/EPB | ·
SAE Code: C055B (Case 1 to 5) ·
Output ECU: Skid control ECU (brake actuator assembly) |
| C142719 | ABS Pump Motor Circuit Current Above Threshold | ·
When the ABS motor relay is operating, an overload in the ABS motor relay is detected for 0.06 seconds or more. ·
When the ABS motor relay is operating, a short in the pump motor drive circuit is detected for 0.06 seconds or more. |
Skid control ECU (brake actuator assembly) | Comes on | Brake/EPB | ·
SAE Code: C1427 (Case 1 and 2) ·
Output ECU: Skid control ECU (brake actuator assembly) |
When performing the normal judgment procedure, make sure that the driver door is closed and is not opened at any time during the procedure.
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off.
Turn the ignition switch to ON (READY) and turn the GTS on.
Depress the brake pedal several times to operate the pump motor of the brake actuator assembly. [*1]
After the pump motor stops, wait for 2 seconds or more. [*2]
[*1] to [*2]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Chassis / Brake/EPB* / Utility / All Readiness.
*: Electric Parking Brake System
Check the DTC judgment result.
If the judgment result shows NORMAL, the system is normal.
If the judgment result shows ABNORMAL, the system has a malfunction.
If the judgment result shows INCOMPLETE, perform driving pattern again.
Before performing troubleshooting, make sure to confirm that the auxiliary battery voltage is normal.
The system may store DTC C052F14 due to a drop in auxiliary battery voltage. If a DTC regarding low system supply power voltage is output at the same time, perform troubleshooting for that DTC first.
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