P0608
DTC P0608
CIRCUIT DESCRIPTION
The engine control module (ECM) creates the vehicle speed output signal by pulsing the circuit to ground. The ECM monitors the voltage on the vehicle speed output circuit. If the ECM determines that the voltage is out of the normal operating range, a DTC sets.
DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC P0608 Vehicle Speed Output Circuit
CONDITIONS FOR RUNNING THE DTC
- The engine speed is more than 400 RPM.
- The ignition voltage is between 9-18 volts.
CONDITIONS FOR SETTING THE DTC
- The ECM detects that the commanded state of the driver and the actual state of the signal circuit do not match.
- The above condition must be present for a minimum of 5 seconds.
ACTION TAKEN WHEN THE DTC SETS
The ECM records the operating conditions at the time the diagnostic fails. The ECM displays the failure information in the Failure Records on the scan tool.
CONDITIONS FOR CLEARING THE MIL/DTC
- The history DTC clears after 40 malfunction-free warm-up cycles.
- The DTC becomes history when the conditions for setting the DTC are no longer present.
- The powertrain control module (PCM) receives the clear code command from the scan tool.
TEST
