Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool References
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information.
Circuit/System Verification
Ignition ON, using the folding mirror switch, the left and right rearview mirrors should extend and retract as commanded.
Circuit/System Testing
1. Ignition OFF, disconnect the X7 harness connector at the appropriate door module.
2. Ignition ON, verify a test lamp does not illuminate between the following circuit terminals and ground:
* Control circuit terminal 1
* Control circuit terminal 2
锟斤拷 If the test lamp illuminates, test the appropriate circuit for a short to voltage.
3. Ignition OFF, test for infinite resistance between the following circuits and ground:
* Control circuit terminal 1
* Control circuit terminal 2
锟斤拷 If less than the specified value, test the appropriate circuit for a short to ground. If the circuits test normal, test or replace the rearview
mirror.
4. Test for 5-15 ohms between the control circuit terminal 1 and the control circuit terminal 2.
锟斤拷 If not within the specified range, test both control circuits for an open/high resistance. If the circuits test normal, test or replace the
rearview mirror.
5. If all circuits test normal, replace the appropriate door module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Outside Rearview Mirror Motor Replacement (See: Body and Frame/Mirrors/Power Mirror Motor/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for DDM or PDM replacement, setup, and
programming
B1735
DTC B1735, B1740, B1745, B1750, B1755, B1760, B1815, or B1820
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 B1735 01
- Seat Front Up Switch Circuit Short to Battery
DTC B1740 01
- Seat Front Down Switch Circuit Short to Battery
DTC B1745 01
- Seat Rear Up Switch Circuit Short to Battery
