GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Has the HVAC Air Delivery System Check been performed?

--

Go to Step 2

Go to HVAC Air Delivery System Check

2

  1. Place the ignition switch in the RUN position.
  2. Place the blower control switch in Med 1.
  3. Push in the recirculation button.
  4. Backprobe a J 39200 (volts) between cavity 4 of the HVAC control module and ground.

Is battery voltage present?

--

Go to Step 3

Go to Step 10

3

  1. Disconnect the connector at the recirculation door motor.
  2. Connect a J 39200 (volts) between the recirculation door motor connector, cavity 6, and ground.
  3. Ensure that the recirculation button is pushed in.

Is battery voltage present?

--

Go to Step 5

Go to Step 4

4

Repair the open in CKT 1614 (DK GRN) between the HVAC control module and the recirculation door motor. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to HVAC Air Delivery System Check

--

5

Connect a J 39200 (volts) between the recirculation door motor connector, cavity 5, and the ground.

Is battery voltage present?

--

Go to Step 7

Go to Step 6

6

Locate and repair the open in CKT 141 (BRN) between splice S243 and the recirculation door motor. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to HVAC Air Delivery System Check

--

7

Connect a J 39200 (continuity) between the recirculation door motor connector, cavity 6, and ground.

Is continuity present?

--

Go to Step 9

Go to Step 8

8

Locate and repair the open in CKT 150 (BLK) between the recirculation door motor and splice S244. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to HVAC Air Delivery System Check

--

9

  1. Ensure the recirculation door flap is not binding.
  2. Replace the recirculation door motor.

Is the repair complete?

--

Go to HVAC Air Delivery System Check

--

10

  1. Disconnect connector C3 at the HVAC control module.
  2. Connect a J 39200 (volts) between the HVAC control module connector C3, cavity 5, and ground.

Is battery voltage present?

--

Go to Step 11

Go to Step 12

11

Replace the HVAC control module. Refer to Control Assembly Replacement .

Is the repair complete?

--

Go to HVAC Air Delivery System Check

--

12

Locate and repair the open in CKT 141 (BRN) between splice S268 and the HVAC control module. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to HVAC Air Delivery System Check

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