Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .
Reference Information
Schematic Reference
Outside Rearview Mirror Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Outside Mirror Description and Operation
Electrical Information Reference
- «Circuit Testing»(ref-301517-S12739748792008101700000)
- «Connector Repairs»(ref-301517-S02286547552008101700000)
- «Testing for Intermittent Conditions and Poor Connections»(ref-301517-S37460750252008101700000)
- «Wiring Repairs»(ref-301517-S19995224182008101700000)
Circuit/System Verification
Ignition ON, engage the rear window defogger. Touch the outside rearview mirror face. The heated mirror face should warm up after about a minute.
Repair Procedures
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Outside Rearview Mirror Glass Replacement
Schematic Reference
Inside Rearview Mirror Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Automatic Day-Night Mirror Description and Operation
Electrical Information Reference
- «Circuit Testing»(ref-301517-S12739748792008101700000)
- «Connector Repairs»(ref-301517-S02286547552008101700000)
- «Testing for Intermittent Conditions and Poor Connections»(ref-301517-S37460750252008101700000)
- «Wiring Repairs»(ref-301517-S19995224182008101700000)
Ignition ON, turn ON the automatic day-night feature of the rearview mirror. A green indicator light will be ON when automatic dimming is ON. Place the gear shiftier into the drive position, cover the ambient light sensor that faces the front windshield. Shine a flashlight into the rearview mirror face. The face of the mirror should darken.
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Inside Rearview Mirror Replacement
Schematic Reference
Outside Rearview Mirror Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Outside Mirror Description and Operation
Electrical Information Reference
- «Circuit Testing»(ref-301517-S12739748792008101700000)
- «Connector Repairs»(ref-301517-S02286547552008101700000)
- «Testing for Intermittent Conditions and Poor Connections»(ref-301517-S37460750252008101700000)
- «Wiring Repairs»(ref-301517-S19995224182008101700000)
Ignition ON, operate the outside rearview mirror switch in the desired direction. While operating the switch observer desired mirror for movement in the desired direction.
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
- «Outside Rearview Mirror Glass Replacement»(ref-301501-S17010330292008101700000)
- «Outside Rearview Mirror Replacement (Sedan)»(ref-301501-S28728214752008101700000)
- «Power Mirror Switch Replacement»(ref-301501-S24407056532008101700000)
Scheme 7
| Callout | Component Name |
|---|---|
| Preliminary Procedure: Remove front door switch bezel. Refer to Front Door Switch Bezel Replacement (Passenger Side) or Front Door Switch Bezel Replacement (Driver Side) . | |
| 1 | Front Side Door Trim Panel Refer to Front Side Door Trim Panel Replacement . |
| 2 | Outside Rear View Mirror Switch Assembly Tip: Disconnect electrical connector. |
Scheme 8
| Callout | Component Name |
|---|---|
| Preliminary Procedure: Remove the interior trim panel. Refer to Front Side Door Trim Panel Replacement . | |
| 1 | Outside Rearview Mirror Nut (Qty: 3) NOTE: Refer to Fastener Notice . Tip: Disconnect the mirror electrical connector. Tighten: 10 N.m (89 lb in) |
| 2 | Outside Rearview Mirror Assembly Tip: The mirror assembly must be ordered and assembled prior to being installed to the vehicle. |
| NOTE |
|---|
| Refer to Fastener Notice . |
Power Mirror System Components
The power mirror system consists of the following components
- Body control module (BCM)
- Outside rearview mirror switch
- Mirror selector switch
- Left outside rearview mirror
- Right outside rearview mirror
- PWR MIRROR 2-amp fuse
Each of the outside rearview mirrors contains 2 motors. The vertical motor operates the mirror in the up and down directions, and the horizontal motor operates the mirror in the left and right directions. Each of the outside rearview mirror motors are circuit breaker protected.
Power Mirror System Controls
The outside rearview mirror switch is a 4 position directional switch: Up, Down, Left and Right.
The mirror select switch is a 3 position switch: L, Off and R.
Heated Mirrors
Battery positive voltage is supplied through the RBEC BATT1 60-amp fuse in the underhood electrical center to the rear defog relay. With the ignition in the ON position, voltage is supplied to the rear defog relay coil when the rear window defogger switch is activated. This energizes the rear window defogger relay and allows battery positive voltage to the HTD MIRROR 10-amp fuse. The HTD MIRROR fuse provides battery positive voltage to the heated mirrors.
Inside Rearview Mirror with the Automatic Day-Night Feature System Components
The inside rearview mirror with the automatic day-night feature system consist of the following components
- Inside rearview mirror
- Ambient air temperature sensor
Power and Ground of the Inside Rearview Mirror
- With the ignition ON, ignition voltage is supplied to the mirror from the POWER MIRRORS fuse in the body control module (BCM).
- Ground for the mirror is provided by G401.
Compass
The mirror uses two magnetic field sensors for compass direction. One sensor is for north and south, the other is for east and west. The mirror supplies a signal and low reference to each sensor. As the vehicle travels with or against the earth's magnetic pull, there will be a change in voltage on one or both sensors. As a result of the change in voltage, the mirror changes the heading on the compass display.
Temperature Display
The inside rearview mirror monitors the ambient air temperature sensor. As the outside air temperature gets warmer, the ambient air temperature sensor will lower resistance. The inside rearview mirror monitors this change and will show this as a warmer temperature on the display. Temperatures exceeding 62°C (143°F) will be out of the mirror's temperature range and SC will be shown on the temperature display. In colder outside air temperatures, the ambient air temperature sensor will raise in resistance. The inside rearview mirror will show a colder temperature on the display. Temperatures lower than -40°C (-40°F) will be out of the mirror's temperature range and OC will be shown on the temperature display. In cold temperatures such as 3°C (37°F) or below, the temperature display will show ICE when the ignition is first turned on. The display will toggle between ICE and the actual outside temperature until the temperature update process is complete.
Temperature Display Update Process
The inside rearview mirror has a temperature program that takes in account the fact that the radiator will heat the ambient air temperature sensor if the radiator is warm and the vehicle is not moving. If the vehicle has been OFF for more than 2 hours, the mirror temperature program assumes that the radiator has cooled and that the temperature supplied by the ambient air temperature sensor is accurate. Because of this, if the vehicle has been OFF for more than 2 hours, the mirror displays the temperature as reported by the ambient air temperature sensor. When the ambient air temperature sensor reports a new temperature to the mirror, one of the following cases will apply
- Ignition is OFF for more than 2 hours, then is turned on for more than 3 minutes. The outside temperature is greater than the last temperature recorded by the mirror for 2 minutes. The mirror will increase the last temperature reading by one degree every 2 minutes for 8 consecutive times. If the outside temperature is not matched after the 8th update, the mirror will then display the current outside temperature.
- Ignition is OFF for more than 2 hours, then is turned on for less than 3 minutes. The mirror will update the temperature display every 2 seconds.
- Ignition is OFF for more than 2 hours, then is turned on for more than 3 minutes. The outside temperature is less than the last temperature recorded by the mirror. The mirror will then display the current outside temperature.
- Ignition has been OFF for less than 2 hours. The outside temperature is greater than the last temperature recorded by the mirror, but the ignition is cycled from ON to OFF within 2 minutes. The mirror will display the old temperature.
- Ignition has been OFF for less than 2 hours. The outside temperature is less than the last temperature recorded by the mirror. The mirror will then display the current outside temperature.
Switches of the Inside Rearview Mirror with the Automatic Day-Night Feature, Compass/Temperature Display without OnStar®
The inside rearview mirror has two switches that perform the following functions
- The TEMP switch is used to turn the compass/temperature display ON or OFF. It is also used to enable or disable the automatic day-night feature of the mirror. With the ignition in the ON position, depress the TEMP switch to enable the compass/temperature display. Depress the TEMP switch again to disable the compass/temperature display. The TEMP switch can be held for 4 seconds in order to change the display from Fahrenheit (°F) to Celsius (°C), or from Celsius (°C) to Fahrenheit (°F). Depress the TEMP switch until the green indicator illuminates on the mirror. This indicates that the automatic day-night feature is enabled. To disable the automatic day-night feature of the mirror, depress the TEMP switch until the green indicator turns OFF.
- The COMP switch is used to turn the compass/temperature display ON or OFF. With the ignition in the ON position, depress the COMP switch to turn the compass/temperature display on. Depress the COMP switch again to turn the compass/temperature display off. The COMP switch is also used to place the compass into a calibration or zone mode. For more information, refer to the owners manual.
Switches of the Inside Rearview Mirror with the Automatic Day-Night Feature, Compass/Temperature Display with OnStar®
The inside rearview mirror has four switches that perform the following functions
- The on/off switch located at the left side of the mirror performs the following functions: To enable or disable the automatic day-night feature of the mirror. With the ignition in the ON position, depress and hold the on/off switch for 6 seconds to enable the automatic day-night feature of the mirror. A green indicator will illuminate on the mirror when the automatic day-night feature is enabled. To disable the automatic day-night feature of the mirror, depress and hold the on/off switch for 6 seconds. To turn the compass/temperature display on and off. With the ignition in the ON position, depress the on/off switch to turn the compass/temperature display on. Depress the on/off switch again to turn the compass/temperature display off. The on/off switch can be held for 4 seconds in order to change the display from Fahrenheit (°F) to Celsius (°C), or from Celsius (°C) to Fahrenheit (°F). The on/off switch is also used to place the compass into a calibration or zone mode. For more information, refer to the owners manual.
- The three switches on the right side of the mirror are for OnStar® operation. For more information, refer to the owners manual.