Test Description
The number below refers to the step number on the diagnostic table.
- 3: Further circuit diagnosis may require instrument panel cluster (IPC) removal. Test the circuit from the PCM to the tachometer for being open, shorted to ground or, voltage. If you can not find any trouble, follow the appropriate IPC diagnostic procedure.
DTC P0654 - PCM Detects That The Commanded State Of The Driver And The Actual State Of The Control Circuit Do Not Match
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Instrument Cluster Schematics | ||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | - | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | With the engine running, does the vehicles tachometer indicate engine RPM? | - | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 |
|
- | Go to Step 5 | Go to Step 4 |
| 4 | Test the engine speed signal circuit for an open, high resistance, or a short to ground. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 9 | Go to Step 7 |
| 5 | Inspect for poor connections at the PCM connector. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 9 | Go to Step 6 |
| 6 | Inspect for poor connections at the harness connector of the Instrument panel cluster (IPC). Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 9 | Go to Step 8 |
| 7 |
IMPORTANT:
Program the replacement PCM. Replace the PCM. Refer to Engine Control Module (ECM) Replacement
.Did you complete the replacement? |
- | Go to Step 9 | - |
| 8 | Replace the IPC. Refer to Instrument Panel Cluster (IPC) Replacement . Did you complete the replacement? |
- | Go to Step 9 | - |
| 9 |
|
- | Go to Step 2 | System OK |