• | 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 | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Folding Mirror Motor Retract Control | B1722 02 | 1 | B1722 01 | -- |
Folding Mirror Motor Extend Control | B1722 02 | 1 | B1722 01 | -- |
1. Power Folding Mirror Inoperative |
This feature allows the operator to simultaneously retract both mirrors to a fully folded position. The driver door module (DDM) contains the power folding mirrors switch and, each mirror contains an additional power folding mirror motor. The DDM sends a GMLAN serial data message to the passenger door module (PDM) when the power folding mirror switch is activated to the retract or extend positions. When the power folding switch is activated to the fold position, the DDM and PDM respond by applying battery voltage and ground to there respective power folding mirror control circuits in order to retract the mirrors. When the switch is activated to unfold the mirrors, the DDM and PDM reverse the polarity of the voltage and ground applied to the motors in order to move both mirrors to the fully extended position.
Battery voltage must be between 9-16 volts.
An improper voltage level is seen on either the folding mirror motor retract control circuit or the folding mirror motor extend control circuit.
The power folding mirror function will be disabled.
• | A current DTC will clear when the fault is no longer present. |
• | A history DTC will clear after 40 fault free ignition cycles. |
Outside Rearview Mirror Schematics
Outside Mirror Description and Operation
Control Module References for scan tool information.
Ignition ON, using the folding mirror switch, the left and right rearview mirrors should extend and retract as commanded.
⇒ | If the test lamp remains OFF during either of the commands, test for a short to voltage, short to ground, or an open/high resistance on either control circuit. If the circuits test normal, replace the DDM. |
⇒ | If the test lamp remains OFF during either of the commands, test for a short to voltage, short to ground, or an open/high resistance on either control circuit. If the circuits test normal, replace the PDM. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for DDM or PDM replacement, setup, and programming |