2010 Cadillac CTS Sedan AWD V6-3.6L Page 420
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
Ignition ON, press the rear window defogger switch. The rear window defogger and both heated mirrors should become warm.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the appropriate outside rearview mirror.
2. Test for less than 10 ohms between the ground circuit terminal 6 and ground.
瀚慖f greater than the specified range, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the door module.
3. Connect a test lamp between the control circuit terminal 7 and ground.
4. Ignition ON, command the mirror heater ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the
commanded states.
瀚慖f the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the door module.
瀚慖f the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the door module.
5. If all circuits test normal, test or replace the outside rearview mirror glass.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Outside Rearview Mirror Glass Replacement (See: Body and Frame/Mirrors/Service and Repair/Outside Rearview Mirror Glass
Replacement)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for DDM and PDM replacement, setup and
programming
B1722
DTC B1722
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC B1722 01
- Mirror Power Fold Control Circuit Short to Battery
DTC B1722 02
- Mirror Power Fold Control Circuit Short to Ground
DTC B1722 04
- Mirror Power Fold Control Circuit Open
Diagnostic Fault Information
Circuit/System Description
The driver door module (DDM) and passenger door module (PDM) control the power folding or power extending functions of the outside rearview
