Corvette 1997-2005

Outside Mirrors

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Power Mirrors



Diagnosis & Testing

Circuit/System Description: The driver door module (DDM) and passenger door module (PDM) each provide motor control output functions for their respective mirrors. These output controls allow each door module to command their respective power mirrors in horizontal and vertical positions. The driver door switch assembly (DDSA) sends a serial data message to the door modules when the mirror switch is activated to the up, down, left or right positions. When the door modules detect an active mirror command from the DDSA, they will command the respective mirror motor in the appropriate direction. Each door module commands their respective mirror motors by applying a ground or voltage to the control circuit, depending on the desired mirror position.

  1. Ignition ON, verify with a scan tool the Mirror Direction Switch parameter changes as the switch is activated. The scan tool should change between UP, DOWN, LEFT, RIGHT.
    1. If the function does not perform as specified, replace the DDSA.
    2.  

  2.  
  3. Verify with a scan tool the mirror select switch parameter changes as the switch is activated. The scan tool should change between DRIVER and PASSENGER.
    1. If the function does not perform as specified, replace the DDSA.
    2.  

  4.  
  5. Ignition OFF, disconnect the appropriate outside rearview mirror X1 harness connector.
  6.  
  7. Ignition OFF, test for less than 1.0 ohm of resistance at each mirror motor control circuit between the outside rearview mirror X1 harness connector and ground.
    1. If greater than the specified range, test the appropriate mirror motor control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the appropriate door control module.
    2.  

  8.  
  9. Connect a test lamp between mirror motor UP control circuit terminal A and mirror motor DOWN control circuit terminal C.
  10.  
  11. Command the appropriate mirror to the UP and DOWN positions with a scan tool. The test lamp should turn ON when commanding the UP and DOWN states.
    1. If the test lamp remains OFF during either of the commands, test for a short to ground on either control circuit. If the circuit tests normal, replace the appropriate door control module.
    2.  

  12.  
  13. Connect a test lamp between mirror motor LEFT control circuit terminal H and mirror motor RIGHT control circuit terminal F.
  14.  
  15. Command the appropriate mirror to the LEFT and RIGHT positions with a scan tool. The test lamp should turn ON when commanding the LEFT and RIGHT states.
    1. If the test lamp remains OFF during either of the commands, test for a short to ground on either control circuit. If the circuit tests normal, replace the appropriate door control module.
    2.  

  16.  
  17. If all circuits test normal, test or replace the appropriate outside rearview mirror.
  18.  

Removal & Installation
  1. Remove the door trim panel.
  2.  
  3. Disconnect the electrical connector to the mirror wire harness.
  4.  
  5. Disconnect the coaxial cable and note the routing, if equipped.
  6.  
  7. Remove the screws from the mirror.
  8.  
  9. Remove the mirror housing.
  10.  

To install:

  1. Position the mirror housing.
  2.  
  3. Install the screws to the mirror.
  4.  
  5. Tighten the mirror motor screws to 89 inch lbs.(10 Nm).
  6.  
  7. Connect the coaxial cable and note the routing, if equipped.
  8.  
  9. Connect the electrical connector to the mirror wire harness.
  10.  
  11. Check the operation of the mirror.
  12.  
  13. Install the door trim panel.
  14.  

Motor

CAUTION
When working with any type of glass or sheet metal with exposed or rough edges, wear approved safety glasses and gloves in order to reduce the chance of personal injury.

  1. Push in on one edge of the mirror face glass tilting the mirror case to allow finger access.
  2.  
  3. Grasp the glass case firmly and pull the case from the mirror body.
  4.  
  5. Disconnect the wire connectors from the case (heated mirror).
  6.  
  7. Remove the two jackscrews from the mirror glass case.
  8.  
  9. Bend the jackscrew over.
  10.  
  11. Press down on the side of the jackscrew popping the jackscrew from the mirror glass case.
  12.  
  13. Save the jackscrews for reinstallation to the mirror motor.
  14.  

To install:


NOTE
The mirror glass case is not the same for the right and left mirror. For ease of assembly of the mirror glass case place a little white lithium grease on the motor pivot and on the tip of the installed jackscrews.

  1. The jackscrew springs must be positioned down compressing the fingers at the bottom of the jackscrews. Push to install the jackscrews into the mirror motor.
  2.  
  3. Rotate both jackscrews to position the ball flanges to be inline with the attaching hub. They will then be correctly positioned to the mirror glass case.
  4.  
  5. Connect the electrical connectors to the mirror glass case (heated mirror).
  6.  
  7. Align the case to the mirror motor.
  8.  
  9. With the palm of your gloved hand press firmly on the center of the mirror glass case until the case engages onto the motor.
  10.  
  11. Push the mirror glass case to the jackscrews.
    1. Right mirror, rotate the mirror glass case down and press firmly on the lower side engaging the mirror glass case to the lower jackscrew.
    2.  
    3. Left mirror, rotate the mirror glass case up and press firmly on the upper side engaging the mirror glass case to the upper jackscrew.
    4.  
    5. Rotate the mirror glass case and press firmly on the outer side engaging the mirror glass case to the outer jackscrew. The jackscrews will give a clicking noise when properly seated.
    6.  

  12.  

Switch
  1. Use a flat bladed tool to release the bezel from the door panel.
  2.  
  3. Disconnect the electrical connections.
  4.  
  5. Use a flat bladed tool to release the switch from the bezel.
  6.  

To install:

  1. Install the switch into the bezel.
  2.  
  3. Reconnect the electrical connection.
  4.  
  5. Reinstall bezel to door panel.
  6.  

 
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