GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2007 🢒 CTS 🢒 Body Systems 🢒 Mirrors 🢒 Power Mirror Memory Recall Position Inaccurate

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. This step verifies that Personalization in the driver information center (DIC) is active. The memory mirrors cannot function if Personalization is inactive. A check mark displayed after the word Personalization indicates it is active.

    2.

  2. This step verifies that the Personalization Option in the dash integration module (DIM) is activated. The memory mirrors cannot function if the option is turned off. An asterisk displayed beside the option indicates that the option is activated.

    3.

  3. This step verifies the integrity of the mirror sensor 5-volt reference circuit.

    4.

  4. This step verifies that the mirror sensor low reference circuit is not open.

  5. This step verifies that the voltage applied by the door module to the mirror position sensor circuits is within the appropriate range. When the mirror motor harness connector is disconnected the measured voltage for each sensor should be 4.25-5.5 volts.

    6.

  6. The position sensors are an integral part of the mirror motor pack assembly and are not serviced separately. If a position sensor fails, the mirror motor must be replaced.

Step

Action

Value(s)

Yes

No

Schematic Reference: Outside Rearview Mirror Schematics

1

Did you perform the Diagnostic System Check - Vehicle?

--

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

Verify that the Power Mirrors - Memory Recall Position Inaccurate complaint is present by performing the following:

  1. Turn ON the ignition, with the engine OFF.
  2. Adjust both outside rearview mirrors to your preference.
  3. With the memory switch, set the personalization recall to your adjustments.
  4. Adjust both outside rearview mirrors to an extreme position.
  5. Press the memory button that was previously programmed.

Did both outside rearview mirrors move back to the programmed setting?

--

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

  1. Turn ON the ignition, with the engine OFF.
  2. Press the radio Tune/SEL button to access the main menu of the driver information center (DIC).
  3. With the Tune/SEL button, scroll until SETUP is highlighted.
  4. Press the Tune/SEL button to access the SETUP menu.
  5. With the Tune/SEL button, scroll to the Personalization menu.
  6. Verify that personalization is in the active state by pressing the Tune/SEL button until a check mark appears after the word Personalization.

Is personalization in the active state?

--

Go to Step 4

Go to Driver Personalization

4

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With the scan tool, navigate to the Setting Options screen of the Dash Integration Module by making the following selections:
    4. • Dash Integration Module
    • Special Functions
    • Set Options
    • Personalization Option
  4. Follow the on-screen instructions to verify that the Personalization Option is activated.

Is the personalization option activated?

--

Go to Step 5

Go to Dash Integration Module Programming and Setup

5

  1. Turn OFF the ignition.
  2. Remove the mirror face of the inoperative mirror in order to access the mirror motor.
  3. Remove the mirror motor and disconnect the mirror motor harness connector.
  4. Turn ON the ignition, with the engine OFF.
  5. Measure the voltage between the 5-volt reference circuit of the harness connector and a good ground.

Was the measured voltage within the specified range?

4.25-5.5 V

Go to Step 6

Go to Step 9

6

Measure the voltage between the 5-volt reference circuit and the low reference circuit of the harness connector.

Was the measured voltage within the specified range?

4.25-5.5 V

Go to Step 7

Go to Step 11

7

  1. Measure the voltage between the mirror vertical position sensor signal circuit and the low reference circuit of the harness connector.
  2. Measure the voltage between the mirror horizontal position sensor signal circuit and the low reference circuit of the harness connector.

Was the measured voltage within the specified range for both sensors?

4.25-5.5 V

Go to Step 8

Go to Step 12

8
  1. Connect a 3-amp fused jumper wire between the horizontal sensor signal circuit and the mirror sensor low reference circuit of the harness connector.
  2. With the scan tool, observe the Left/Right Sensor parameter.
  3. Connect the 3-amp fused jumper wire between the vertical sensor signal circuit and the mirror sensor low reference circuit of the harness connector.
  4. With the scan tool, observe the Up/Down Sensor parameter.

Did the scan tool indicate the voltage for each sensor was within the specified range?

0-0.5 V

Go to Step 14

Go to Step 12

9

Test the 5-volt reference circuit for an open or a short to ground. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

--

Go to Step 18

Go to Step 10

10

Test the 5-volt reference circuit for a short to voltage or a short to any other circuit in the harness connector. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

--

Go to Step 18

Go to Step 15

11

Test the mirror sensor low reference circuit for an open. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

--

Go to Step 18

Go to Step 15

12

Test the appropriate position sensor signal circuit for an open or a short to ground. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

--

Go to Step 18

Go to Step 13

13

Test the appropriate position sensor signal circuit for a short to voltage or a short to any other circuit in the harness connector. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

--

Go to Step 18

Go to Step 15

14

Inspect for poor connections at the harness connector of the inoperative mirror motor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

--

Go to Step 18

Go to Step 16

15

Inspect for poor connections at the C5 harness connector of the door module associated with the inoperative mirror. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

--

Go to Step 18

Go to Step 17

16

Replace the inoperative outside rearview mirror motor. Refer to Outside Rearview Mirror Motor Replacement .

Did you complete the replacement?

--

Go to Step 18

--

17

Replace the door module. Refer to Control Module References .

Did you complete the replacement?

--

Go to Step 18

--

18

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 2