GM Service Manual Online
For 1990-2009 cars only

Speedometer and/or Odometer Inoperative Gasoline

Step

Action

Value(s)

Yes

No

1

Was the Instrument Cluster System Check performed?

--

Go to Step 2

Go to Instrument Cluster System Check

2

In order to inspect for conditions with the vehicle speed sensor (VSS) and the vehicle control module (VCM), perform the following diagnostic tests:

    • ABS Diagnostic System Check in Antilock Brakes
    • Powertrain OBD System Check in Engine Controls

Did you perform these tests?

--

Go to Step 3

--

3

  1. Disconnect the connector at the instrument cluster.
  2. Disconnect connector C4 at the VCM.
  3. Connect a J 39200 between the instrument cluster connector, cavity B14 for CKT 389 (DK GRN), and ground.

Is continuity present?

--

Go to Step 4

Go to Step 5

4

Repair the short to ground in CKT 389 (DK GRN) between the VCM and the instrument cluster.

Is the speedometer and/or the odometer operative?

--

Go to Instrument Cluster System Check

Go to Step 5

5

Connect a J 39200 in CKT 389 (DK GRN) between the instrument cluster connector, cavity B14 and VCM connector C4, cavity 4.

Is continuity present?

--

Go to Step 6

Go to Step 7

6

Replace the instrument cluster. Refer to Instrument Cluster Replacement .

Is the speedometer and/or the odometer operative?

--

Go to Instrument Cluster System Check

--

7

Repair the open in CKT 389 (DK GRN) between the VCM and the instrument cluster.

Is the speedometer and/or the odometer operative?

--

Go to Instrument Cluster System Check

--

Speedometer and/or Odometer Inoperative Diesel

Step

Action

Value(s)

Yes

m

No

1

Was the Instrument Cluster System Check performed?

--

Go to Step 2

Go to Instrument Cluster System Check

2

In order to inspect for conditions with the vehicle speed sensor (VSS) and the VSS buffer perform the following diagnostic tests:

    • ABS Diagnostic System Check in Antilock Brakes
    • Powertrain OBD System Check in Engine Controls

Did you perform these tests?

--

Go to Step 3

--

3

  1. Disconnect the connector at the instrument cluster.
  2. Disconnect the connector at the VSS buffer and powertrain control module (PCM) connector C2.
  3. Connect a J 39200 between the instrument cluster connector, cavity B14 for CKT 389 (DK GRN), and ground.

Is continuity present?

--

Go to Step 4

Go to Step 5

4

Repair the short to ground in CKT 389 (DK GRN) between the VSS buffer and the PCM or the instrument cluster.

Is the speedometer and/or the odometer operative?

--

Go to Instrument Cluster System Check

Go to Step 5

5

Connect a J 39200 in CKT 389 (DK GRN) between the instrument cluster connector, cavity B14 and PCM connector C2, cavity 6, or between the VSS buffer connector, cavity 15 (Diesel).

Is continuity present?

--

Go to Step 6

Go to Step 7

6

Replace the instrument cluster. Refer to Instrument Cluster Replacement .

Is the speedometer and/or the odometer operative?

--

Go to Instrument Cluster System Check

--

7

Repair the open in CKT 389 (DK GRN) between the VSS buffer and the instrument cluster or the PCM.

Is the speedometer and/or the odometer operative?

--

Go to Instrument Cluster System Check

--