GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Driver Information System Check?

--

Go to Step  2

Go to Driver Information System Check

2

  1. Turn the ignition switch to RUN.
  2. Use the scan tool DIC-IPC tests. Select the segment test.
  3. Command all segments to indicate ON.

Do all DIC display segments illuminate for approximately 3 seconds?

--

Go to Step  4

Go to Step  3

3

Inspect the DIC connector for proper terminal contact.

Is the contact OK?

--

Go to Step  5

Go to Step  8

4

Inspect CKT 40 (ORN) for a open.

Is the wiring OK?

--

Go to Step  9

Go to Step  7

5

Replace the HVAC control assembly.

Did you complete the repair?

--

Go to Driver Information System Check

--

6

Inspect the following terminals for proper terminal contact:

  1. DIC connector terminal A4
  2. DIC connector terminal A6
  3. DIC connector terminal B4
  4. DIC connector terminal B5

Are the contacts OK?

--

Go to Driver Information System Check

Go to Step  19

7

Repair the open in CKT 40 (ORN).

Did you complete the repair?

--

Go to Driver Information System Check

--

8

Repair the poor terminal contact.

Did you complete the repair?

--

Go to Driver Information System Check

--

9

Inspect for a open in CKT 41 (BRN).

Is the wiring OK?

--

Go to Step  11

Go to Step  10

10

Repair the open in CKT 41 (BRN).

Is the wiring OK?

--

Go to Driver Information System Check

--

11

Inspect for a open in CKT  150 (BLK).

Is the wiring OK?

--

Go to Step  13

Go to Step  12

12

Repair the open in CKT 150 (BLK).

Did you complete the repair?

--

Go to Driver Information System Check

--

13

Inspect for a open in CKT 351 (BLK/WHT).

Is the wiring OK?

--

Go to Step  15

Go to Step  14

14

Repair the open in CKT 351 (BLK/WHT).

Did you complete the repair?

--

Go to Driver Information System Check

--

15

Inspect for a short to ground in CKT  40 (ORN).

Is the wiring OK?

--

Go to Step  17

Go to Step  16

16

Repair the short to ground in CKT  40 (ORN).

Did you complete the repair?

--

Go to Driver Information System Check

--

17

Inspect for a short to ground in CKT 41 (BRN).

Is the wiring OK?

--

Go to Step  6

Go to Step  18

18

Repair the short to ground in CKT 41 (BRN).

Did you complete the repair?

--

Go to Driver Information System Check

--

19

Repair the poor terminal contact.

Did you complete the repair?

--

Go to Driver Information System Check

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