Test C: DTCs C1742 - Rear Sounder Circuit Failure and C1743 - Rear Sounder Circuit Short To Vbatt

PINPOINT TEST C: DTCs C1742 - REAR SOUNDER CIRCUIT FAILURE AND C1743 - REAR SOUNDER CIRCUIT SHORT TO VBATT

C1-C3:

C3-C6:

Normal Operation
With the ignition switch in the RUN position, and the gear selector in REVERSE (R), the parking aid system calculates the distance to an object by the use of a radar sensor. A 750 Hz variable warning tone is generated by the parking aid sounder. The sounder increases its warning tone rate as the vehicle gets closer to an obstacle. When an object is detected within 45.7 cm (18 in) of the vehicle, the warning tone becomes continuous. Voltage is supplied from the parking aid module to the parking aid sounder through circuit 1437 (BK/PK). The parking aid sounder is grounded through circuit 676 (PK/OG). The parking aid sounder is part of the high mounted stoplamp.

DTC C1742 - is a continuous and on-demand DTC that sets if the parking aid module detects a short to ground on the rear sounder circuit 1437 (BK/PK) when the vehicle is in REVERSE (R).

DTC C1743 - is a continuous and on-demand DTC that sets if the parking aid module detects a short to voltage on the rear sounder circuit 1437 (BK/PK) when the vehicle is not in REVERSE (R).

Possible Causes
- Circuit 1437 (BK/PK) short to ground or voltage
- Parking aid system wiring harness
- Parking aid sounder (part of high mounted stoplamp)
- Parking aid module