DTC C146C: Open Circuit in ABS Motor Relay Circuit [04/2018 - 08/2021]: Description
The ABS motor relay supplies power to the pump motor. While the ABS is activated, the skid control ECU (brake actuator assembly) turns the ABS motor relay on to operate the pump motor.
If the voltage supplied to the ABS motor relay (+BM) is too low due to low voltage from the battery or alternator, this DTC may be stored.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C146C | Open Circuit in ABS Motor Relay Circuit | Any of the following is detected:
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DTC DETECTION CONDITIONS: C146C
| Vehicle Condition | ||||
|---|---|---|---|---|
| Pattern 1 | Pattern 2 | Pattern 3 | ||
| Diagnosis Condition | The ABS motor relay is actuated. | ◦ | - | - |
| The ABS motor relay is not actuated. | - | ◦ | - | |
| Malfunction Status | Voltage is not supplied to the pump motor. | ◦ | - | - |
| Voltage in the pump motor is high. | - | ◦ | - | |
| The skid control ECU (brake actuator assembly) judges that pump motor operation is abnormal. | - | - | ◦ | |
| Detection Time | - | - | - | |
| Number of Trips | 1 trip | 1 trip | 1 trip | |
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.