Tachometer Inaccurate or Inoperative
WARNING: This page is about a different car, the 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
Tachometer Inaccurate or Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: | |||
| 1 | Did you perform the Instrument Cluster Diagnostic Starting Point? | Go to Step 2 | Go to |
| 2 |
|
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Using a multimeter, Inspect the Instrument Panel cluster Engine Speed Output circuit cavity 27 for 6.5v-7.0v. Refer to Testing for Intermittent Conditions and Poor Connections
in wiring systems Is voltage within specified value? |
Go to Step 6 | Go to Step 4 |
| 4 | Using a multimeter, Inspect the PCM Engine Speed Output circuit connector 4 cavity 5 (C3 cavity 3 LNK) for 6.5v-7.0v. Refer to Testing for Intermittent Conditions and Poor Connections
in wiring systems 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 PCM and the I/P. Refer to Wiring Repairs
in Wiring Systems Did you complete the repair? |
Go to Step 8 | - |
| 6 | Replace the IPC. Refer to Instrument Panel Cluster (IPC) Replacement . Did you complete the replacement? |
Go to Step 8 | - |
| 7 | Replace the PCM. Refer to Powertrain Control Module (PCM) 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 |