GM Service Manual Online
For 1990-2009 cars only

Circuit Description

The mirror position sensors are potentiometers powered by the door module for the mirror. The driver door module (DDM), and the passenger door module (PDM), determine the horizontal and vertical position of their respective mirrors based on the signal voltages from the mirror position sensors. Each mirror has a vertical position sensor and a horizontal position sensor.

Conditions for Running the DTC

The DDM and the PDM must be powered, in communications with each other, and can not have B1327 or B1328 set.

Conditions for Setting the DTC

These DTCs will set if:

    • A mirror position sensor signal voltage is below 0.25 volts for 2 seconds.
    • A mirror position sensor signal voltage is above 4.75 volts for 2 seconds.

Action Taken When the DTC Sets

Memory movements are disabled. Manual movements are not disabled.

Conditions for Clearing the DTC

The current DTC clears when the door module no longer senses the failure. The DTC is stored as a history DTC. The history DTC will clear either after 50 OFF/ON ignition cycles without a repeated failure or in response to a scan tool command.

Diagnostic Aids

If the Personalization Option in the Dash Integration Module (DIM) is activated on a vehicle that does not have the A45 Memory Mirrors option, DTCs B1583, B1593, B1613, and B1623 will be erroneously set. If these DTCs are set on a vehicle that does not have A45, refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System to deactivate the option.

After readjusting the mirror positions, be sure to set the mirror memory switch to the new positions.

Step

Action

Value(s)

Yes

No

Schematic Reference: Outside Rearview Mirror Schematics

1

Did you perform the Door Systems Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - Door Systems

2

Is the vehicle equipped with the A45 Memory Mirrors option?

--

Go to Step 4

Go to Step 3

3

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Navigate to the Personalization Option screen of the Dash Integration Module (DIM).
  4. Follow the on screen instructions to deactivate the personalization option.

Did you complete the deactivation?

--

Go to Step 10

Go to Body Control Module (BCM) Programming/RPO Configuration in Body Control System

4

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With the mirror position switch, move the appropriate mirror to the limits of travel.
  4. With the scan tool, observe the applicable Mirror Position parameter in the Driver Door Module, Data list.

Does the scan tool indicate the voltage changes and is within the specified range?

0.25-4.75 V

Go to Step 10

Go to Step 5

5

  1. Turn OFF the ignition.
  2. Disconnect the mirror harness connector from the door module.
  3. Measure the voltage of the position sensor 5 volt reference circuit at the door module pin.
  4. Turn ON the ignition, with the engine OFF.

Does the voltage measure near the specified value?

4.75-5.50 V

Go to Step 6

Go to Step 9

6

  1. Turn OFF the ignition.
  2. Connect a 3 amp fused jumper wire between the appropriate mirror position sensor signal circuit, and the mirror position sensor low reference circuit at the door module pins.
  3. Turn ON the ignition, with the engine OFF.
  4. With the scan tool, observe the applicable Mirror Position parameter.

Does the scan tool indicate the voltage is near the specified value?

0-0.25 V

Go to Step 7

Go to Step 9

7

Inspect for poor connections at the appropriate door module mirror harness connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 10

Go to Step 8

8

Replace the appropriate mirror. Refer to Power Mirror Replacement .

Did you complete the replacement?

--

Go to Step 10

--

9

Replace the appropriate door module. Refer to Door Control Module Replacement .

Did you complete the replacement?

--

Go to Step 10

--

10

  1. Use the scan tool, in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC reset?

--

Go to Step 2

System OK