DTC C1252-52: Brake Booster Pump Motor on Time Abnormally Long; DTC C1253-53: Pump Motor Relay Malfunction [06/2015 - ]: Description
The skid control ECU (brake booster with master cylinder assembly) detects decreases in the accumulator pressure according to the data from the accumulator pressure sensor, and then starts and stops the pump motor by operating the motor relay.
| DTC No. |
Detection Item |
INF Code |
DTC Detection Condition |
Trouble Area |
Note |
| C1252/52 |
Brake Booster Pump Motor on Time Abnormally Long |
311 |
The pump motor is operating continuously for 178 seconds or more. (When the relay is malfunctioning for 98 seconds or more.) |
- Short in motor circuit or motor monitor circuit
- Motor relay stuck
- Accumulator pressure sensor malfunction in brake actuator (Brake booster with master cylinder assembly)
- Skid control ECU (Brake booster with master cylinder assembly)
|
Electronically controlled brake system DTC |
| C1253/53 |
Pump Motor Relay Malfunction |
321
322
323
324
325
326
327
328
329 |
- INF Code: 321
- With IG1 terminal voltage 9.5 V or more, the motor drive monitor remains off for 0.2 seconds or more after a motor drive on request.
- INF Code: 322
- The motor drive monitor remains on for 2 seconds or more after a motor drive off request.
- INF Code: 323
- A skid control ECU (brake booster with master cylinder assembly) internal motor drive logical inconsistency continues for 2 seconds or more.
- INF Code: 324
- An open circuit is detected in the skid control ECU (brake booster with master cylinder assembly) internal motor relays 1 and 2.
- INF Code: 325
- An open circuit is detected in the skid control ECU (brake booster with master cylinder assembly) internal motor relays 1 and 3.
- INF Code: 326
- An open circuit is detected in the skid control ECU (brake booster with master cylinder assembly) internal motor relays 2 and 3.
- INF Code: 327
- An open circuit is detected in the skid control ECU (brake booster with master cylinder assembly) internal motor relay 1.
- INF Code: 328
- An open circuit is detected in the skid control ECU (brake booster with master cylinder assembly) internal motor relay 2.
- INF Code: 329
- An open circuit is detected in the skid control ECU (brake booster with master cylinder assembly) internal motor relay 3.
|
- INF Code: 321, 324, 325, 326, 327, 328, 329
- Open in motor circuit or motor monitor circuit
- Skid control ECU (Brake booster with master cylinder assembly)
- INF Code: 322
- Short in motor circuit or motor monitor circuit
- Skid control ECU (Brake booster with master cylinder assembly)
- INF Code: 323
- Skid control ECU (Brake booster with master cylinder assembly)
|
Electronically controlled brake system DTC |