Circuit/System Testing
WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
RAP Malfunction - Except Sunroof or SEO RAP Function
- Ignition ON, with the scan tool, check for and diagnose any current DTC.
- Perform system verification. Verify that the radio and DDM RAP mode is inoperative or always ON.
- If for both components the RAP modes are inoperative or always ON, then replace the BCM. Refer to repair instructions.
- If one of the components the RAP mode is inoperative or always ON, replace the component. Refer to repair instructions.
RAP Malfunction - Sunroof
- If the sunroof RAP mode is malfunctioning, enable RAP mode and test for RAP mode control circuit voltage (12 volts) at the sunroof module.
- If voltage is present repair/replace the sunroof module.
- If voltage is not present, test for an open/high resistance in the RAP mode control circuit.
- If a condition is found make the appropriate repair.
- If the circuit tests normal, then replace the BCM.
RAP Malfunction - SEO RAP Relay
- Test for voltage at the SEO RAP relay. enable the RAP mode and test both the RAP mode control circuit and the battery supply circuit for voltage.
- If voltage is present repair/replace the junction block- left I/P.
- If voltage is not present, test for an open/high resistance in the sunroof-RAP control circuit and/or the battery feed circuit. Verify that the EAP fuse in the underhood fuse block is not open.
- If a condition is found make the appropriate repair.
- If the RAP mode control circuit tests normal and battery voltage on the load side of the relay is present, replace the BCM.