GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

Tools Required:

    • J 39200 Digital Multimeter
    • J 36169-A Fused Jumper Wire

1

Were you sent here from the Power Sunroof System Check?

--

Go to Step 2

Go to Power Sunroof System Check .

2

  1. Disconnect the sunroof control module connector.
  2. Turn the ignition switch to the ON position.
  3. Measure the voltage from terminal 6 and 12 to ground.

Is the voltage equal to the specified value?

B+

Go to Step 3

Go to Step 10

3

Measure the voltage from terminal 6 or 12 to terminal 11.

Is the voltage equal to the specified value?

B+

Go to Step 4

Go to Step 11

4

Test for continuity between terminal 1 and 11 while depressing the slide switch to the open position.

Does continuity exist?

--

Go to Step 5

Go to Step 12

5

Test for continuity between terminal 3 and 11 while depressing the tilt switch to the Up position.

Does continuity exist?

--

Go to Step 6

Go to Step 13

6

Test for continuity between terminal 8 and 11.

Does continuity exist?

--

Go to Step 7

Go to Step 15

7

Test for continuity between terminal 9 and 11.

Does continuity exist?

--

Go to Step 18

Go to Step 8

8

  1. Reconnect the sunroof control module connector.
  2. Disconnect the sunroof actuator assembly connector. Refer to Sunroof Actuator Replacement for access.
  3. Connect a fused jumper wire from terminal 4 to terminal 5.
  4. Measure the voltage between terminal 1 and 2 while depressing the slide switch to the open position.

Is the voltage equal to the specified value?

B+

Go to Step 9

Go to Step 20

9

Replace the sun roof actuator assembly. Refer to Sunroof Actuator Replacement .

Is the repair complete?

--

Go to Power Sunroof System Check

--

10

Locate and repair the open in the BLK wire between terminal 6 or 12 of the sunroof control module terminal and the accessory power relay. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Power Sunroof System Check

--

11

Locate and repair the open in the WHT/BLK wire between the sunroof control module terminal 11 and G200. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Power Sunroof System Check

--

12

  1. Disconnect the sunroof switch assembly connector. Refer to Sunroof Switch Replacement for access.
  2. Test for continuity between terminal 4 and ground.

Does continuity exist?

--

Go to Step 13

Go to Step 14

13

Replace the sunroof switch assembly. Refer to Sunroof Switch Replacement .

Is the repair complete?

--

Go to Power Sunroof System Check

--

14

Locate and repair the open in the WHT/BLK wire between the sunroof actuator and G200. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Power Sunroof System Check

--

15

  1. Disconnect the sunroof actuator assembly connector. Refer to Sunroof Actuator Replacement for access.
  2. Test for continuity between terminal 8 of the control module connector and terminal 5 of the sunroof actuator connector.

Does continuity exist?

--

Go to Step 16

Go to Step 17

16

Replace the sunroof actuator assembly. Refer to Sunroof Actuator Replacement

Is the repair complete?

--

Go to Power Sunroof System Check

--

17

Locate and repair the open in the GRN/ WHT wire between the control module and the actuator assembly. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Power Sunroof System Check

--

18

  1. Disconnect the sunroof actuator connector. Sunroof Actuator Replacement for access.
  2. Test for continuity between terminal 9 of the control module connector and terminal 6 of the sunroof actuator connector.

Does continuity exist?

--

Go to Step 16

Go to Step 19

19

Locate and repair the open in the RED/BLU wire between the control module and the actuator assembly. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Power Sunroof System Check

--

20

  1. Disconnect the sunroof control module connector.
  2. Test for continuity between terminal 4 of the control module connector and terminal 1 of the sunroof actuator connector.

Does continuity exist?

--

Go to Step 21

Go to Step 23

21

Test for continuity between terminal 5 of the control module connector and terminal 2 of the sunroof actuator connector.

Does continuity exist?

--

Go to Step 22

Go to Step 24

22

Replace the sunroof control module.

Is the repair complete?

--

Go to Power Sunroof System Check

--

23

Locate and repair the open in the RED wire between the control module and the actuator assembly. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Power Sunroof System Check

--

24

Locate and repair the open in the GRN wire between the control module and the actuator assembly. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Power Sunroof System Check

--