Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Instrument Cluster Diagnostic System Check? | -- | ||
2 |
Important: If the instrument cluster is completely inoperative, refer to Instrument Cluster Inoperative .
Does the vehicle's speedometer gauge indicate a vehicle speed? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | |
3 |
Does the DMM display a voltage greater than the specified value? | 9.5 V | ||
4 |
Does the DMM display continuity? | -- | ||
5 | Test the continuity from the vehicle speed sensor signal (4 K) circuit to a good ground using a DMM. Refer to Testing for Continuity in Wiring Systems. Does the DMM display continuity? | -- | ||
6 | Test the instrument cluster harness connector for a poor connection to the instrument cluster. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems. Did you find and repair the condition? | -- | ||
7 |
Does the DMM display continuity? | -- | ||
8 | Test the continuity of the vehicle speed sensor signal (4 K) circuit from the VCM harness connector to a good ground using the DMM. Refer to Testing for Continuity in Wiring Systems. Does the DMM display continuity? | -- | Go to Step 13 | |
9 | Repair the open vehicle speed sensor signal (4 K) circuit from the instrument cluster electrical connector to the in line connector C101. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | -- | |
10 |
Important: If you cannot locate a grounded circuit, disconnect each component (one at a time) and see if the grounded condition is caused by a component on the vehicle speed sensor signal (4 K) circuit. Refer to Circuit Testing in Wiring Systems. Repair the grounded vehicle speed sensor signal (4 K) circuit from the instrument cluster electrical connector to the in line connector C101. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | -- | |
11 | Repair the open vehicle speed output (4 K) circuit from the instrument cluster electrical VCM harness connector to the in line connector C101. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | -- | |
12 | Repair the grounded vehicle speed output (4 K) circuit from the VCM harness connector to the in line connector C101. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | -- | |
13 | Test the VCM harness connector for poor connections. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
14 |
Important: Program the replacement VCM. Refer to VCM Replacement/Programming in Engine Controls-4.3L. Replace the VCM. Did you complete the replacement? | -- | -- | |
15 | Replace the instrument cluster. Refer to Instrument Cluster Replacement . Did you complete the replacement? | -- | -- | |
16 | Operate the system in order to verify the repair. Did you find and correct the condition? | -- | System OK | Go to Step 3 |
