Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit/System Description
The vehicle is equipped with the parallel parking mode feature. For this feature, the front passenger door module (PDM) communicates with the powertrain control module (PCM) over the GMLAN serial data circuit. When the gear selector is shifted to reverse, the PCM transmits this status via a GMLAN message to the PDM. The PDM then applies voltage and ground to the vertical motor of the RH outside rearview mirror to tilt the mirror down 7 degrees. This allows the driver to see the curb while parallel parking. When the gear selector is shifted out of reverse, the PDM powers the vertical mirror motor to return the mirror to its previous position.
Reference Information
Schematic Reference
Outside Rearview Mirror Schematics
Connector End View Reference
Description and Operation
Outside Mirror Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information.
Circuit/System Testing
- Ignition ON, verify the mirror to curb in reverse feature is activated in the vehicle personalization. Refer to Driver Information Center (DIC) Description and Operation.
- If the mirror to curb in reverse option is activated, replace the PDM.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for PDM replacement, setup, and programming
