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Control circuit terminal 2 If less than the specified value, test the appropriate circuit for a short to ground. If the 4. Test for 5-15 ohms of resistance between the control circuit terminal 1 and the control circuit terminal 2. If not within the specified range, test both control circuits for an open/high resistance. 5. If all circuits test normal, replace the appropriate door switch. Repair Procedures Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Outside Rearview Mirror Motor Replacement Control Module References for DDS or PDS replacement, setup, and programming SYMPTOMS - MIRRORS 1. Perform the Diagnostic System Check - Vehicle before using the Symptom Tables in order to verify that all of the following are true: There are no DTCs set. The control modules can communicate via the serial data link. 2. Review the system operation in order to familiarize yourself with the system functions. Refer to the following system descriptions: Outside Mirror Description and Operation (Heated Mirrors)Outside Mirror Automatic Day-Night Mirror Description and Operation Visual/Physical Inspection Inspect for aftermarket devices which could affect the operation of the system. Refer to Inspect the easily accessible or visible system components for obvious damage or conditions IMPORTANT: The following steps must be completed before using the symptom tables.
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Mirrors - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Intermittent Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Symptom List Refer to a symptom diagnostic procedure from the following list in order to diagnose the Heated Mirrors Inoperative Automatic Day-Night Mirrors Inoperative (With RPO DL3/DR4) or Automatic Day- Power Mirror Folding Inoperative Power Mirrors Inoperative HEATED MIRRORS INOPERATIVE 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. Diagnostic Fault Information Circuit/System Description The Driver Door Switch (DDS) and Passenger Door Switch (PDS) supply voltage to the outside Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance Mirror Heating Element B1640 02 1 B1640 01 - Low Reference - 1 1 - 1. Heated Mirror Malfunction
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Mirrors - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Reference Information Schematic Reference Outside Rearview Mirror Schematics Connector End View Reference Component Connector End Views Description and Operation Outside Mirror Description and Operation (Heated Mirrors) or Outside Mirror Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs Sacn Tool Reference Control Module References For Scan Tool Information. Circuit/System Verification 1. Ignition ON, press the rear window defogger switch. Verify the rear window defogger indicator illuminates. If the rear window defogger indicator does not illuminate, refer to Rear Window 2. Rear window defogger ON, verify both the left and right outside mirror glass become warm. Circuit/System Testing 1. Ignition OFF, disconnect the harness connector X3 at the appropriate door switch. 2. Ignition ON, verify a test lamp does not illuminate between the supply voltage circuit terminal 7 and ground. If the test lamp illuminates, test the supply voltage circuit for a short to voltage.
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Mirrors - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
3. Ignition OFF, test for infinite resistance between the supply voltage circuit terminal 7 and ground. If less than the specified value, test the supply voltage circuit for a short to ground. If 4. Test for 5-10 ohms of resistance between the supply voltage circuit terminal 7 and the low reference circuit terminal 3. If not within the specified range, test the supply voltage circuit and the low reference 5. If all circuits test normal, test or replace the appropriate door switch. Repair Procedures Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Outside Rearview Mirror Glass Replacement Control Module References for DDS or PDS replacement, setup and programming AUTOMATIC DAY-NIGHT MIRRORS INOPERATIVE (WITH RPO DL3/DR4) 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. Diagnostic Fault Information Circuit/System Description Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance Backup Lamp Supply Voltage 1 1 2 - Automatic Day/Night Mirror 2 2 1 - Low Reference - 2 2 - 1. Rearview mirror remains dimmed in reverse
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Mirrors - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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