The instrument panel cluster (IPC) monitors the engine speed signal to determine the tachometer position. If the IPC determines the engine speed signal voltage is out of the normal operating range, a DTC will set.
This diagnostic procedure supports the following DTC:
DTC B0560 Tachometer Circuit
• | The engine speed is greater than 800 RPM. |
• | The ignition voltage is greater than 9 volts, but less than 18 volts. |
• | The IPC detects that the commanded state of the driver and the actual state of the control circuit do not match. |
• | The above condition is present for at least 5 seconds. |
The IPC stores the DTC in memory.
• | A last test failed (current DTC) clears when the diagnostic runs and does not fail. |
• | A history DTC clears after 100 consecutive malfunction-free warm-up cycles. |
• | The IPC receives the clear code command from the scan tool. |
Step | Action | Yes | No |
---|---|---|---|
Schematic Reference: Instrument Cluster Schematics | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |
2 |
Does the Engine Speed parameter match the tachometer display? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
3 |
Does the vehicle tachometer indicate an RPM reading? | Go to Step 5 | Go to Step 4 |
4 | Test the engine speed signal circuit for an open, a short to voltage or a short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 9 | Go to Step 6 |
5 | Inspect for poor connections at the PCM connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 9 | Go to Step 7 |
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 . Did you find and correct the condition? | Go to Step 9 | Go to Step 8 |
7 | Replace the PCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 9 | -- |
8 | Replace the IPC. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 9 | -- |
9 |
Does the DTC reset? | Go to Step 2 | System OK |