GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you review the radio/audio with speed compensated volume (SCV) system description and operation

--

Go to Step 2

Go to Symptoms

2

Verify the fault is present.

Does the system operate normally?

--

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Determine if there are diagnostic trouble codes (DTCs) related to the vehicle speed sensor per the applicable driveablity and emissions section.

Are there DTCs present?

--

Go to Step 4

Go to Step 5

4

Perform diagnostics as per the applicable driveabilty and emissions section.

Are all DTCs repaired and cleared?

--

Go to Step 5

Go to Step 2

5

Determine if the vehicle's engine type is gasoline or diesel.

Is the engine type gasoline?

--

Go to Step 6

Go to Step 7

6

  1. Disconnect the radio C2 connector.
  2. Disconnect the vehicle control module C4 connector.
  3. Disconnect the cruise control module connector.
  4. Connect a J 39200 digital multimeter between radio connector C2 cavity 16 for CKT 817 (DK GRN/WHT) and ground.

Is continuity present?

--

Go to Step 8

Go to Step 9

7

  1. Disconnect the vehicle speed sensor buffer connector.
  2. Disconnect the radio C2 connector.
  3. Connect a J 39200 digital multimeter between the vehicle speed sensor buffer connector cavity 14 and the radio connector C2 cavity 16 for CKT 817 (DK GRN/WHT).

Is continuity present?

--

Go to Step 10

Go to Step 11

8

Repair the short to ground in CKT 817 (DK GRN/WHT) between the vehicle control module, the cruise control module, and the radio. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 15

--

9

Connect a J 39200 digital multimeter between radio connector C2 cavity 16 and vehicle control module connector C4 cavity 3 for CKT 817 (DK GRN/WHT).

Is continuity present?

--

Go to Step 12

Go to Step 13

10

  1. Remove the radio. Refer to Radio Replacement .
  2. Send the radio in for repair.

Is the repair complete?

--

Go to Step 15

--

11

Repair the open in CKT 817 (DK GRN/WHT) between vehicle speed sensor buffer control module connector and the radio. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 15

--

12

  1. Determine if the cruise control system operates.
  2. If required, reconnect all the connectors and test drive the vehicle in order to inspect the cruise control system operation, refer to Cruise Control System Operation in Cruise Control.

Does the cruise control system operate properly?

--

Go to Step 10

Go to Step 14

13

Repair the open in CKT 817 (DK GRN/WHT) between the vehicle control module and the radio. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 15

--

14

Repair cruise control system. Refer to Symptoms in Cruise Control.

Is the repair complete?

--

Go to Step 15

--

15

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3