DTC C1A4B: Stop Light Relay Circuit [11/2015 - ]: Description
The skid control ECU (brake booster with master cylinder assembly) sends a stop light operation request signal to the stop light relay (stop light switch assembly). If the skid control ECU (brake booster with master cylinder assembly) detects a malfunction in the stop light relay circuit, the pre-collision city sensor stores DTC C1A4B.
| DTC No. |
DTC Detection Condition |
Trouble Area |
| C1A4B |
- All of the following conditions are met:
- 3 seconds have elapsed since the power switch was turned on (IG).
- The auxiliary battery voltage is 10 V or more for 3 seconds or more.
- Communication between the pre-collision city sensor and skid control ECU (brake booster with master cylinder assembly) is normal.
- The pre-collision city sensor receives a stop light relay circuit malfunction signal from the skid control ECU (brake booster with master cylinder assembly) for 1 second or more.
|
- Lighting system
- Electronically controlled brake system
- Skid control ECU (Brake booster with master cylinder assembly)
- Stop light relay (Stop light switch assembly)
- Wire harness or connector
|