Tachometer Inaccurate or Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Instrument Cluster Schematics Connector End View Reference: Displays and Gages Connector End Views |
|||
| 1 | Did you review the Instrument Cluster Diagnostic Description and Operation and perform the necessary inspections? | Go to Step 2 | Go to Instrument Cluster Description and Operation |
| 2 |
|
Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
| 3 | Using a multimeter, inspect the instrument panel cluster (IPC) engine speed output circuit cavity 27 for 6.5-7V. Refer to Testing for Intermittent Conditions and Poor Connections
. Is voltage within specified value? |
Go to Step 6 | Go to Step 4 |
| 4 | Using a multimeter, inspect the powertrain control module (PCM) engine speed output circuit connector 4 cavity 5 (C3 cavity 3 LNK) for 6.5-7V. Refer to Testing for Intermittent Conditions and Poor Connections
. Is voltage within specified value? |
Go to Step 5 | Go to Step 7 |
| 5 | Repair the open or high resistance in the engine speed output circuit between the PCM and the instrument panel (I/P). Refer to Wiring Repairs
. Did you complete the repair? |
Go to Step 8 | - |
| 6 | Replace the IPC. Refer to Instrument Cluster Replacement . Did you complete the replacement? |
Go to Step 8 | - |
| 7 | Replace the PCM. Refer to Powertrain Control Module Replacement
. Did you complete the replacement? |
Go to Step 8 | - |
| 8 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 2 |