Test C: DTC C1742 - Rear Sounder Circuit Failure and DTC C1743 -Rear Sounder Circuit Short to Vbatt

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

C1-C2:

C2-C4:

C5-C6:

Normal Operation
With the ignition switch in the RUN position and the REVERSE (R) gear is selected, 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 speaker.

The parking aid speaker tone is controlled by the parking aid module through circuit CMP09 (BN/BU) and is grounded through circuit RMP09 (BU/GN). The parking aid speaker is located in the driver D-pillar area.

DTC C1742 - is a continuous and on-demand DTC that sets if the parking aid module detects a short to ground or open on the rear speaker circuit CMP09 (BN/BU) when the vehicle is in REVERSE (R) and a detectable object is within the azimuth field.

DTC C1743 - is a continuous and on-demand DTC that sets if the parking aid module detects a short to voltage on the rear speaker circuit CMP09 (BN/BU) when the vehicle is in REVERSE (R) and a detectable object is within the azimuth field.

Possible Causes
- Circuit CMP09 (BN/BU) open, short to ground or voltage
- Circuit RMP09 (BU/GN) open
- Parking aid speaker
- Parking aid module