DTC C1A4B: Stop Light Relay Circuit [08/2014 - ]: Description
The stop light switch assembly sends a brake pedal operation signal to the driving support ECU assembly. Based on the signal, the driving support ECU assembly detects the operation of the brake pedal.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| C1A4B | While the power switch is on (IG). When the skid control ECU (brake booster with master cylinder assembly) detects a malfunction in the stop light control relay circuit, it sends a malfunction signal to the driving support ECU assembly via CAN communication and the driving support ECU assembly stores this DTC. |
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