B0560
DTC B0560
CIRCUIT DESCRIPTION
The engine control module (ECM) creates the engine speed signal by pulsing the signal circuit to ground at the rate of 2 pulses per engine revolution. The instrument panel cluster (IPC) converts the signal to a tachometer position. The IPC also receives a class 2 message from the ECM indicating the engine speed. The IPC uses this class 2 message for diagnostic purposes.
DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC B0560 Tachometer Circuit
CONDITIONS FOR RUNNING THE DTC
- The IPC receives a class 2 message from the ECM indicating that the engine speed is greater than 800 RPM.
- The ignition voltage is between 9-18 volts.
CONDITIONS FOR SETTING THE DTC
- The IPC does not detect a 2 pulses per engine revolution signal on the engine speed signal circuit.
- The above condition is present for at least 5 seconds.
ACTION TAKEN WHEN THE DTC SETS
The IPC stores a DTC B0560 in memory.
CONDITIONS FOR CLEARING THE DTC
- A history DTC clears after 100 malfunction free warm-up cycles.
- The DTC becomes history when the conditions for setting the DTC are no longer present.
- The IPC receives the clear code command from the scan tool.
TEST
