GM Service Manual Online
For 1990-2009 cars only

Step

Action

Values

Yes

No

1

Check the fuse F18.

Is the fuse open?

--

Go to Step 2

Go to Step 3

2

Repair any short circuit and replace the open fuses.

Did you complete the repair?

--

System OK

--

3

  1. Remove the controller.
  2. Turn ON the ignition.
  3. Measure the voltage between terminal A7 and A16 of the connectors.

Does the voltage measure within the specified value?

11-14 V

Go to Step 4

Go to Step 5

4

  1. Inspect the connector and controller for damages.
  2. Repair the damaged parts or replace the controller.

Did you complete the repair?

--

System OK

--

5

Measure the resistance between terminal A16 of the connector and ground.

Does the resistance measure equal to the specified value?

0 ohms

Go to Step 6

Go to Step 7

6

Repair the open circuit between fuse F18 and terminal A7.

Did you complete the repair?

--

System OK

--

7

Repair the open circuit between terminal A16 and ground.

Did you complete the repair?

--

System OK

--