P0608
DTC P0608
CIRCUIT DESCRIPTION
The engine control module (ECM)/powertrain control module (PCM) creates the vehicle speed output signal by pulsing the circuit to ground. The ECM/PCM monitors the voltage on the vehicle speed output circuit. If the ECM/PCM 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 6-18 volts.
CONDITIONS FOR SETTING THE DTC
- The ECM/PCM 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/PCM records the operating conditions at the time the diagnostic fails. The ECM/PCM 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 ECM/PCM receives the clear code command from the scan tool.
TEST
