Chevrolet Trax: Automatic day-night mirrors malfunction
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 inside rearview mirror uses 2 photocell sensors. One sensor is the rear
light sensor, located on the face side
of the mirror, facing the rear of the vehicle. The rear light sensor is used to
determine light conditions present at
the mirror face. The other sensor is the front light sensor, located on the
backside of the mirror, facing the front
of the vehicle. The front light sensor is used to determine the exterior light
conditions at the front of the vehicle.
With a low exterior light condition detected by the front light sensor and a
high light condition from the rear
light sensor, the inside rearview mirror will automatically darken the face of
the inside rearview mirror.
With the gear selector lever in the REVERSE position and the engine running,
backup lamp control voltage is
supplied as an input to the inside rearview mirror. The mirror monitors this
input to disable the automatic daynight feature. This allows the driver to see
objects in the mirror clearly when backing up, regardless of the rear
light sensor status.
Reference Information
Schematic Reference
Inside Rearview Mirror Schematics (Encore), Inside Rearview Mirror
Schematics (Trax)
Connector End View Reference
WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS -
INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT
CONNECTOR END VIEWS - INDEX - TRAX
Description and Operation
Automatic Day-Night Mirror Description and Operation
Electrical Information Reference
- Circuit Testing
- Connector Repairs
- Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs
Circuit/System Verification
- Ignition ON.
- Cover the windshield with a blanket or other suitable item.
- Verify the A10 Inside Rearview Mirror face dims when shining a bright
light into the rear light sensor
- If the A10 Inside Rearview Mirror does not dim
Refer to Circuit/System Testing - Inside Review Mirror Dimming Inoperative
- If the A10 Inside Rearview Mirror dims
- Verify the A10 Inside Rearview Mirror face transitions from dim to
bright while commanding the Backup
Lamps Active and Inactive with a scan tool.
- If the A10 Inside Rearview Mirror does not transition between dim and
bright
Refer to Circuit/System Testing - Day-Night Disable Malfunction
- If the A10 Inside Rearview Mirror transitions between bright and dim
states
- All OK.
Circuit/System Testing
Inside Review Mirror Dimming Inoperative
- Ignition OFF and all vehicle systems OFF, disconnect the harness
connector at the A10 Inside Rearview
Mirror. It may take up to 2 minutes for all vehicle systems to power down.
- Test for less than 10 ohms between the ground circuit terminal 5 and
ground.
- Ignition OFF.
- Test for less than 2 ohms in the ground circuit end to end.
- If 2 ohms or greater, repair the open/high resistance in the circuit.
- If less than 2 ohms, repair the open/high resistance in the ground
connection.
- If less than 10 ohms
- Ignition ON.
- Verify a test lamp illuminates between the ignition circuit terminal 2
and ground.
- If the test lamp does not illuminate and the circuit fuse is good
- Ignition OFF.
- Test for less than 2 ohms in the ignition circuit end to end.
- If 2 ohms or greater, repair the open/high resistance in the circuit.
- If less than 2 ohms, refer to Retained Accessory Power Malfunction .
- If the test lamp does not illuminate and the circuit fuse is open
- Ignition OFF.
- Test for infinite resistance between the ignition circuit and ground.
- If less than infinite resistance, repair the short to ground on the
circuit.
- If infinite resistance, replace the A10 Inside Rearview Mirror.
- If the test lamp illuminates
- Replace the A10 Inside Rearview Mirror.
Day-Night Disable Malfunction
- Ignition OFF, disconnect the harness connector at the A10 Inside
Rearview Mirror.
- Connect a test lamp between the control circuit terminal 1 and ground
- Ignition ON, verify the test lamp turns ON and OFF while commanding the
Backup Lamps Active and
Inactive with a scan tool.
- If the test lamp is always OFF
- Ignition OFF, remove the test lamp, disconnect the harness connector at
the K9 Body Control
Module.
- Test for infinite resistance between the control circuit terminal 1 and
ground.
- If less than infinite resistance, repair the short to ground on the
circuit.
- If infinite resistance
- Test for less than 2 ohms in the control circuit end to end.
- If 2 ohms or greater, repair the open/high resistance in the circuit.
- If less than 2 ohms, refer to Backup Lamps Malfunction (Manual
Transmission) ,
Backup Lamps Malfunction (Automatic transmission) .
- If the test lamp is always ON
- Ignition OFF, remove the test lamp, disconnect the harness connector at
the K9 Body Control
Module, ignition ON.
- Test for less than 1 V between the control circuit and ground.
- If 1 V or greater, repair the short to voltage on the circuit.
- If less than 1 V, refer to Backup Lamps Malfunction (Manual Transmission)
, Backup
Lamps Malfunction (Automatic transmission)
- If the test lamp turns ON and OFF
- Replace the A10 Inside Rearview Mirror.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair
Inside Rearview Mirror Replacement
READ NEXT:
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
Diagn
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.
Diag
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.
Diag
SEE MORE:
Warning
Do not store heavy or sharp
objects in storage compartments.
In a crash, these objects may
cause the cover to open and
could result in injury.
If equipped, pull the handle to open.
Slide the latch to open.
Press the button to open the
storage above the glovebox.
NOTE: This article is intended for general information purposes
only. It does not apply
specifically to one make or model.
PURPOSE
NOTE: This article is intended for general information purposes
only. It does not apply
specifically to one make or model.
WHY USE THE SYMPTOM CHECK LIST WORKSHEETS?
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