GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2007 🢒 Rendezvous - FWD 🢒 Body Systems 🢒 Mirrors 🢒 DTC B1560, B1565, B1570, or B1575

Circuit Description

The outside rearview mirror switch supplies power and ground inputs to the memory seat module (MSM) for use in driving the driver and passenger outside rearview mirror horizontal and vertical motors. When the MSM recognizes the input combination, it moves the appropriate mirror motor in the requested direction. If the MSM sees the input combination for greater than 30 seconds, a DTC B1560, B1565, B1570 or B1575 is set and the mirror outputs are disabled.

DTC Descriptors

This diagnostic procedure supports the following DTCs:

    • DTC B1560 Mirror Right Control Switch Circuit
    • DTC B1565 Mirror Left Control Switch Circuit
    • DTC B1570 Mirror Up Control Switch Circuit
    • DTC B1575 Mirror Down Control Switch Circuit

Conditions for Running the DTCs

Battery input voltage between 9-16 volts.

Conditions for Setting the DTCs

Mirror switch inputs to the MSM are active for greater than 30 seconds.

Action Taken When the DTC Sets
    • Mirror outputs are disabled.
    • Memory recall commands are ignored.

Conditions for Clearing the DTC
    • The MSM no longer detects the switch failure for greater than 30 seconds.
    • DTC will clear after 50 consecutive ignition cycles.

Diagnostic Aids
    • The following conditions may cause an intermittent malfunction:
       - An outside rearview mirror switch that is sticking.
       - An outside rearview mirror switch that was pressed for longer than 30 seconds.
    • If the DTC does not reset after it has been cleared, then the malfunction may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections .

Test Description

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

  1. This step determines whether the DTC is current or intermittent.

    2.

  2. This step tests for a stuck or shorted outside rearview mirror switch.

Step

Action

Yes

No

Schematic Reference: Outside Rearview Mirror Schematics

Connector End View Reference: Vehicle Access Connector End Views or Power Seat Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, monitor the DTC Information for DTC B1560, B1565, B1570 or B1575 in the memory seat module (MSM).

Does the scan tool indicate that DTC B1560, B1565, B1570 or B1575 is current?

Go to Step 3

Go to Diagnostic Aids

3

  1. Turn OFF the ignition.
  2. Disconnect the outside rearview mirror switch.
  3. Turn ON the ignition, with the engine OFF.
  4. Use the scan tool in order to clear the DTCs.
  5. Operate the vehicle within normal operating conditions.

Does the DTC reset?

Go to Step 4

Go to Step 5

4

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

Did you find and correct the condition?

Go to Step 8

Go to Step 6

5

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

Did you find and correct the condition?

Go to Step 8

Go to Step 7

6

Replace the MSM. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 8

--

7

Replace the outside rearview mirror switch. Refer to Power Mirror Switch Replacement .

Did you complete the replacement?

Go to Step 8

--

8
  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