Possible Causes

circuit (GY/B) open or short to ground
instrument cluster
PCM
CAUTION:
- Use the correct probe adaptor(s) when making measurements. Failure to use the correct probe adaptor(s) may damage the connector.

SPEEDOMETER/ODOMETER INOPERATIVE PINPOINT TEST REFERENCE

PINPOINT TEST 5		SPEEDOMETER/ODOMETER IS INOPERATIVE
STEP	INSPECTION		ACTION
1	CARRY OUT THE INSTRUMENT CLUSTER GAUGES ACTIVE COMMAND USING THE DIAGNOSTIC TOOL Key ON. Enter the following diagnostic mode on the diagnostic tool: Instrument Cluster Active Command Select the instrument cluster gauges active command. Trigger, monitor, and sweep the gauges. Observe the speedometer gauge. Does the speedometer gauge sweep correctly?	Yes	Go to next step.
1		No	Go to step 3.
2	CHECK CIRCUIT (GY/B) FOR AN OPEN OR A SHORT TO GROUND Key OFF. Disconnect: Instrument cluster 0922-102. Disconnect: PCM 0140-175. Measure the resistance between the instrument cluster 0922-102 pin 5, (GY/B), harness side and the PCM 0140-175 pin 68, (GY/B), harness side; and between the instrument cluster 0922-102 pin 5, (GY/B), harness side and ground. Is the resistance less than 5 ohms between the instrument cluster and the PCM, and greater than 10,000 ohms between the instrument cluster and ground?	Yes	Go to step 4.
2		No	Repair circuit (GY/B) for an open or short to ground. Test the system for normal operation.
3	CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION Disconnect all the instrument cluster connectors. Check for: Corrosion pushed-out pins Connect all the instrument cluster connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present?	Yes	Install a new Instrument cluster. See INSTRUMENT CLUSTER . Test the system for normal operation.
3		No	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
4	CHECK FOR CORRECT PCM OPERATION Disconnect the PCM connector. Check for: corrosion pushed-out pins Connect the PCM connector and make sure it seats correctly. Operate the system and verify the concern is still present. Is the concern still present?	Yes	Install a new PCM. See POWERTRAIN CONTROL MODULE (PCM) REMOVAL / INSTALLATION . TEST the system for normal operation.
4		No	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.