1. Disconnect the instrument cluster.
2. Disconnect either the vehicle speed sensor (VSS) calibrator for diesel engine vehicles or the vehicle control module (VCM) for gasoline engine vehicles.
3. Use a J 39200 DMM in order to measure the resistance from the instrument cluster connector, cavity 14 and the VSS calibrator connector, cavity 15, or the VCM connector C4, cavity 4.

Refer to Using Connector Test Adapters in Wiring Systems.

Did the resistance measure greater than the specified value?

1.0 ohms

Go to Step 2

Go to Step 3

Repair the open in CKT 389 (DK GRN) between the instrument cluster connector and the VSS calibrator connector, or the VCM connector C4.

Did you complete the repair?

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System OK

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Use a J 39200 DMM in order to measure the resistance between the instrument cluster connector, cavity 14, and ground.

Did the resistance measure less than the specified value?

1 M ohms

Go to Step 4

Go to Step 5

Repair the short to ground in CKT 389 (DK GRN) between the instrument cluster connector and the VSS calibrator connector, or the VCM connector C4.

Did you complete the repair?

--

System OK

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Use a J 39200 DMM in order to measure the voltage between the instrument cluster connector, cavity 14, and ground.

Did the voltage measure greater than the specified value?

1.0 V

Go to Step 6

Go to Step 7

Repair the short to voltage in CKT 389 (DK GRN) between the instrument cluster connector and the VSS calibrator connector, or the VCM connector C4.

Did you complete the repair?

--

System OK

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Refer to the following procedures in Engine Controls in order to diagnose the speedometer signal:

Did you complete the repair?

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System OK

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