GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

1

  1. Remove the full automatic temperature control (FATC) controller from the instrument panel.
  2. Disconnect the FATC connectors.
  3. Examine the connector terminals on the harness connectors and the controller connectors and the harness wiring.

Is there any problem with the connector or terminals?

Go to Step 2

Go to Step 3

2

  1. Repair any damaged connector or terminals or replace it as required.
  2. Reconnect the FATC connectors.
  3. Turn ON the ignition.
  4. Observe the temperature display screen on the controller.

Does the display indicate a continuing presence of a DTC 8 condition?

Go to Step 2

System OK

3

Replace the FATC controller.

Did you complete the repair?

System OK

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