Test F: DTC C1742 and C1743 Rear Sounder Circuit Failure/Short to Battery

PINPOINT TEST F: DTC C1742 AND C1743 REAR SOUNDER CIRCUIT FAILURE/SHORT TO BATTERY

F1-F4:

F4-F6:

F6-F7:

Normal Operation
The system can be disabled by the parking aid switch. A 750 Hz variable warning tone is generated from a parking aid speaker. The parking aid speaker increases the warning tone rate as the vehicle gets closer to an obstacle.

Possible Causes
- circuit 1437 (BK/PK) open or short to ground
- circuit 1438 (DG) open, short to ground, or short to voltage
- parking aid module
- parking aid speaker