DTC C172F[12] DRL Left Circuit Short to Battery (BCM)

1. DTC C172F[12] description

When the light control switch is set to the OFF, TAIL, or AUTO position while the engine is running, the daytime running light (DRL) is activated. When the DRL operating conditions are met, the BCM controls the DRL output circuit and illuminates the DRL. If the BCM detects a malfunction in the DRL output circuit, the DTC is set.

The specifications of the DRL output circuit controlled by the BCM differ as follows depending on the installation position of the DRL.

DRL installation position	BCM circuit
	DRL (right) output circuit	DRL (left) output circuit
Headlight	〇	─
Front bumper	〇	〇

2. Condition for setting DTC C172F[12]

Condition for running the DTC

Condition for setting the DTC

Any of the following conditions are met:

3. Action taken when DTC C172F[12] sets