P0704

DTC P0704 (Diesel)








Circuit Description
Battery voltage is supplied from the brake fuse to the clutch switch. The clutch switch is a normally-closed switch. When the clutch pedal is released, the clutch pedal position switch signal circuit is pulled up to B+. When the clutch pedal is applied, the switch opens, and the voltage drops to 0 volts,
If the powertrain control module (PCM) detects a specified number of vehicle speed transitions without detecting a clutch switch transition, DTC P0704 will set. DTC P0704 is a type B DTC.

Conditions for Running the DTC:
No vehicle speed sensor (VSS) DTC P0500.

Conditions for Setting the DTC:
The PCM detects 7 changes in vehicle speed between 0 - 38 km/h (0 - 24 mph) without the PCM detecting a clutch pedal transition.

Action Taken When the DTC: Sets
- For California vehicles, the PCM illuminates the malfunction indicator lamp (MIL) during the second consecutive trip in which the Conditions for Setting the DTC are met.
- For Federal vehicles, the PCM does not illuminate the MIL.
- The PCM disables cruise control.
- The PCM disables power take-off.
- The PCM records the operating conditions when the Conditions for Setting the DTC are met. The PCM records this information as Freeze Frame and Failure Records.
- The PCM stores DTC P0704 in PCM history.

Conditions for Clearing the MIL/DTC
- The PCM turns OFF the MIL during the third consecutive trip in which the diagnostic test runs and passes.
- The PCM cancels the DTC default actions when the ignition switch is OFF long enough in order to power down the PCM.
- A history DTC clears after 40 consecutive warm-up cycles, if no failures are present by this diagnostic or any other emission-related diagnostic.
- A scan tool can clear the MIL/DTC.