P0807
DTC P0806-P0808
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
DTC P0806
- Clutch Pedal Position (CPP) Sensor Performance
DTC P0807
- Clutch Pedal Position (CPP) Sensor Circuit Low Voltage
DTC P0808
- Clutch Pedal Position (CPP) Sensor Circuit High Voltage
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The clutch pedal position (CPP) sensor is a three wire sensor, connected to a 5 V reference circuit, a low reference circuit, and a signal circuit. The engine control module supplies 5 V to the CPP sensor, and also provides a sensor ground path on the low reference circuit. The CPP sensor sends a voltage signal to the ECM on the signal circuit. The voltage on the signal circuit will vary from a voltage less than or equal to 5 V when the clutch pedal is released, to a voltage less than or equal to 1.5 V when the clutch pedal is applied.
Conditions for Running the DTC
P0806, P0807 and P0808
* DTCs P0642, P0643, P0335, P0336, P0607 or P080A are not set.
* The system voltage is more than 9 V.
* The ignition is in the RUN position.
Conditions for Setting the DTC
P0806
The CPP sensor is stuck in range.
P0807
The CPP sensor voltage is less than 0.1 V for more than 1 s.
P0808
The CPP sensor voltage is more than 5.2 V for more than 1 s.
Action Taken When the DTC Sets
DTC P0806 - P0808 are Type A DTCs.
Conditions for Clearing the DTC
DTC P0806 - P0808 are Type A DTCs.
Reference Information
Schematic Reference
Manual Transmission Schematics (MR6 (F40)) Electrical Diagrams
Connector End View Reference
Component Connector End Views Outside Rearview Mirror - Driver
Description and Operation
Transmission System Description and Operation Transmission System Description and Operation
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Engine Control Module Scan Tool Information (LEA) Scan Tool Testing and ProceduresEngine Control Module Scan Tool Information (LHU) Scan Tool Testing and Procedures for scan tool information
Circuit/System Verification
1. Ignition ON, Engine OFF, verify with a scan tool that no other DTCs are set except DTC P0806, P0807 or P0808 in the ECM.
• If DTC P080A is set
Refer to Clutch Pedal Position Sensor Learn Testing and Inspection.
• If DTC P080A sets again or the ECM will not learn the clutch pedal position
Refer to Circuit/System Testing.
• If other DTCs are set except DTC P0806, P0807, P0808 or P080A
Refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.
• If DTCs P0806, P0807 or P0808 are set
2. Ignition ON, Engine OFF, clutch pedal in the full release position. Verify with a scan tool the B25B clutch pedal position sensor percent value is zero percent.
• If greater than the specified value
Refer to Circuit/System Testing.
• If equal to the specified value
3. Ignition ON, Engine OFF, clutch pedal in the fully depressed position. Verify with a scan tool the B25B clutch pedal position sensor percent value displays between 95-100 percent.
• If less than the specified value
Refer to Circuit/System Testing.
• If within the specified values
4. Ignition ON, Engine OFF, verify with a scan tool the B25B clutch pedal position sensor percent parameter values vary between a minimum of zero percent when the clutch pedal is released to a maximum of 100 percent when the clutch pedal is fully depressed.
• If the B25B clutch pedal position sensor percent values does not vary or the percent values dropout or momentary spikes during clutch pedal movement
Refer to Circuit/System Testing.
• If the B25B clutch pedal position sensor percent values does vary and the values do not spike or dropout, during clutch pedal movement
5. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observe from the Freeze Frame/Failure Records data.
6. Verify the DTC does not set.
• If the DTC sets
Refer to Circuit/System Testing.
• If the DTC does not set
7. All OK
Circuit/System Testing
1. Ignition OFF and all vehicle systems OFF, disconnect the B25B clutch pedal position sensor harness connector. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 5 ohms between the low reference circuit terminal A and the negative post of the battery.
• If 5 ohms or greater
1. Ignition OFF, disconnect the harness connector at the K20 engine control module.
2. Test for less than 5 ohms in the low reference circuit, wire end to wire end.
• If 5 ohms or greater, repair the open/high resistance in the wire circuit.
• If less than 5 ohms, replace the K20 engine control module.
• If less than 5 ohms
3. Ignition ON.
4. Test for 4.8-5.2 V between the 5 V reference circuit terminal C and ground.
• If less than 4.8 V
1. Ignition OFF, disconnect the harness connector at the K20 engine control module.
2. Test for infinite resistance between the 5 V reference circuit and ground.
• If less than infinite resistance, repair the short to ground on the wire circuit.
• If infinite resistance.
3. Test for less than 2 ohms in the 5 V reference circuit, wire end to wire end.
• If 2 ohms or greater, repair the open/high resistance in the wire circuit.
• If less than 2 ohms, replace the K20 engine control module.
• If greater than 5.2 V
1. Ignition OFF, disconnect the harness connector at the K20 engine control module. Ignition ON.
2. Test for less than 1 V between the 5 V reference circuit and ground.
• If 1 V or greater, repair the short to voltage on the wire circuit.
• If less than 1 V, replace the K20 engine control module.
• If between 4.8-5.2 V
5. Verify the scan tool B25B clutch pedal position sensor parameter is less than 0.5 V.
• If 0.5 V or greater
1. Ignition OFF, disconnect the X1 harness connector at the K20 engine control module. Ignition ON.
2. Test for less than 1 V between the signal circuit terminal B and ground.
• If 1 V or greater, repair the short to voltage on the wire circuit.
• If less than 1 V, replace the K20 engine control module.
• If less than the 0.5 V
6. Install a 3-amp fused jumper wire between the signal circuit terminal B and the 5 V reference circuit terminal C.
7. Verify the scan tool B25B clutch pedal position sensor parameter is greater than 4.5 V.
• If 4.5 V or less
1. Ignition OFF, disconnect the harness connector at the K20 engine control module.
2. Test for infinite resistance between the signal circuit terminal B and ground.
• If less than infinite resistance, repair the short to ground on the wire circuit.
• If infinite resistance.
3. Test for less than 2 ohms in the signal circuit, wire end to wire end.
• If 2 ohms or greater, repair the open/high resistance in the wire circuit.
• If less than 2 ohms, replace the K20 engine control module.
• If greater than the 4.5 V
8. Test or replace the B25B clutch pedal position sensor.
Component Testing
1. Install a 3 A fused jumper wire between the 5 V reference terminal C and 5 V.
2. Install a jumper wire between the low reference terminal A and ground.
3. Test for between 0.5 and 5.2 V without any spikes or dropouts between the signal terminal B and the low reference circuit terminal A while moving the sensor through the entire range.
• If not between 0.5 and 5.2 V or has spikes or dropouts
Replace the B25B clutch pedal position sensor.
• If between 0.5 and 5.2 V and there are no spikes or dropouts
4. All OK
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Clutch Pedal Position Sensor Replacement Service and Repair
* Control Module References Control Module References for ECM replacement, programming and setup.