Outside Mirrors Automatic Day-Night Feature Inoperative
Outside Mirrors Automatic Day-Night Feature Inoperative
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview)provides an overview of each diagnostic category.
Circuit/System Description
The automatic day/night feature of the driver outside rearview mirror is controlled by the inside rearview mirror. The inside rearview mirror supplies a signal and a low reference to the driver outside rearview mirror. The voltage on the signal circuit of the driver outside rearview mirror varies between 0.5-1.5 volts depending on light conditions present at the inside rearview mirror. At night, with the automatic day-night feature enabled, the driver outside rearview mirror will automatically darken with the inside rearview mirror to reduce the glare from the headlamps from behind. The voltage on the signal circuit of the driver outside rearview mirror will be near 1.5 volts. In daytime conditions, the mirrors are in the normal state. The voltage on the signal circuit of the driver outside rearview mirror may be less than or near 0.5 volts. For more detailed information concerning automatic day night mirror operation refer to Automatic Day-Night Mirror Description and Operation (Automatic Day-Night Mirror Description and Operation) .
Reference Information
Schematic Reference
* Inside Rearview Mirror Schematics (Inside Rearview Mirror Schematics)
* Outside Rearview Mirror Schematics (Outside Rearview Mirror Schematics)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Outside Mirror Description and Operation (Outside Mirror Description and Operation)
Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
Scan Tool Reference
Control Module References (Programming and Relearning)for scan tool information
Circuit/System Testing
1. Ignition OFF, disconnect the X1 harness connector at the driver outside rearview mirror.
2. Ignition OFF, test for less than 1.0 ohm of resistance between the low reference circuit terminal G and ground.
• If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the inside rearview mirror.
3. Ignition ON, test for 0.5-1.5 volts between the signal circuit terminal D and ground.
• If less than the specified range, test the signal circuit terminal D for a short to ground or an open/high resistance. If the circuit tests normal, replace the inside rearview mirror.
• If greater than the specified range, test the signal circuit terminal D for a short to voltage. If the circuit tests normal, replace the inside rearview mirror.
4. If all circuits test normal, test or replace the driver outside rearview mirror.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Inside Rearview Mirror Replacement (Inside Rearview Mirror Replacement)
* Mirror Replacement (Mirror Replacement)