Malfunction Indicator Lamp (MIL), Diagnostic Trouble Code (DTC) P0833, Cruise Control Inoperative (Adjust Clutch Release Switch)
| Subject: | Malfunction Indicator Lamp (MIL), Diagnostic Trouble Code (DTC) P0833, Cruise Control Inoperative (Adjust Clutch Release Switch) |
| Models: | 2005-2007 Chevrolet Corvette |
| with 6-Speed Manual Transmission |
This bulletin is being revised to provide additional diagnostic information for setting the DTC. Please discard Corporate Bulletin Number 05-08-68-001A (Section 08 -- Body & Accessories).
Condition
Some customers may comment on a malfunction indicator lamp. Some customers may also comment that the cruise control is inoperative.
A scan tool may reveal a DTC P0833. Cruise Disengaged History Reason will display "Lost Forward Gear" on Tech 2®.
Cause
The clutch release switch may be misadjusted.
Diagnostic Information
There are two clutch switches
| • | The lower switch, the clutch start switch provides feedback to the PCM that the clutch pedal has been depressed to enable starting. This switch DOES NOT relate to the P0883 code. |
| • | The upper switch, the clutch pedal position switch also referred to in SI as the clutch pedal cruise control release switch, provides the PCM feedback as to the position of the clutch pedal. |
| • | Refer to Manual Transmission Component Views, Figure 2: 01 Y-Car: Comp Loc Views (Under LH Side of the Dash) in SI for switch locations. |
Important: Multiple clutch presses during a single stop may provide inaccurate feedback to the PCM and the technician may misdiagnose the need to replace the PCM. The Tech 2® may not pick up the multiple presses which would appear that the PCM is not picking up the signal. The PCM should not be replaced if the Tech 2® does not pick up multiple clutch cycles during testing.
Conditions for Setting the DTC
| • | The vehicle speed goes from 0 km/h (0 mph) to greater than 39 km/h (24 mph) and back to 0 km/h (0 mph) for two seconds without the ECM detecting a clutch transition. |
| • | This must occur seven times before the diagnostic reports a fault. |
For additional information of DTC P0833, refer to SI.
Correction
DO THIS | DON'T DO THIS |
|---|---|
Adjust the Clutch Release Switch | DO NOT replace the PCM. |
- Adjust the Clutch Release Switch. Refer to Clutch Release Switch Replacement in SI.
- Once the Clutch Release Switch is adjusted, secure the Clutch Release Switch wiring harness with electrical tape or a plastic tie to a surrounding harness to insure the switch does not rotate and become misadjusted again.
- Clear the DTC with a scan tool.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation | Description | Labor Time |
|---|---|---|
R1240 | Switch, Cruise Control Release - (Clutch) - R&R or Replace | Use Published Labor Operation Time |
