B0540
DTC B0540
CIRCUIT DESCRIPTION
The instrument panel cluster (IPC) monitors the vehicle speed signal to determine the speedometer position. If the IPC determines the vehicle speed signal voltage is out of the normal operating range, a DTC will set.
DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC B0540 Speedometer Circuit
CONDITIONS FOR RUNNING THE DTC
- The vehicle speed is more than 10 km/h (6 mph).
- The ignition voltage is between 9-18 volts.
CONDITIONS FOR SETTING THE DTC
- The IPC detects that the commanded state of the driver and the actual state of the control circuit do not match.
- The condition above must be present for a minimum of 5 seconds.
ACTION TAKEN WHEN THE DTC SETS
- The IPC stores a DTC B0540 in memory.
- The speedometer defaults to 0 km/h (0 mph).
- No driver warning message will be displayed for this DTC.
CONDITIONS FOR CLEARING THE DTC
- The 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
