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
