DTC C146C: Open Circuit in ABS Motor Relay Circuit; DTC C146D: Short Circuit in ABS Motor Relay Circuit [04/2018 - ]: Description
WARNING: This page is about a different variant/trim than selected.
The ABS motor relay is built into the brake booster with master cylinder assembly.
During ABS, TRAC, VSC, brake hold, secondary collision brake or brake assist operation, the skid control ECU (brake booster with master cylinder assembly) turns on the ABS motor relay to run the pump motor in the brake actuator assembly.
When any DTC related to the ABS motor is stored, the IC built into the skid control ECU (brake booster with master cylinder assembly) operates in fail-safe mode.
When the supplied voltage to the BM terminal of the ABS motor relay is excessively low due to an auxiliary battery or charging circuit malfunction, DTC C146C and/or C146D is stored.
| DTC No. | Detection Item | INF Code | DTC Detection Condition | Trouble Area | MIL | Note |
|---|---|---|---|---|---|---|
| C146C | Open Circuit in ABS Motor Relay Circuit | 612 | When operation of the ABS motor is requested, the ABS motor voltage is less than 7.6 V for 0.2 seconds or more. |
|
Comes on |
|
| C146D | Short Circuit in ABS Motor Relay Circuit | 613 | A short in the ABS motor relay drive circuit is detected for 4 seconds or more. |
|
Comes on |
|