Diagnostic Instructions

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

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
5 V Reference	P0806 P0807	P0806 P0807	P0808	--
Position Sensor Signal	P0807	P0807	P0808	P0806
Low Reference	--	P0808	--	--

Circuit/System Description

The clutch pedal position (CPP) sensor is a three-wire sensor, connected to a 5-volt reference circuit, a low reference circuit, and a signal circuit. The engine control module (ECM) supplies 5 volts 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 volts when the clutch pedal is released, to a voltage less than or equal to 1.5 volts when the clutch pedal is applied.

Conditions for Running the DTC

System voltage is greater than 9 V.

Conditions for Setting the DTC

P0806

The ECM detects that the clutch pedal position (CPP) sensor is stuck in a range less than the learned released position when the clutch is determined to be released.

P0807

The ECM detects that the clutch pedal position (CPP) sensor voltage is less than 0.25 V.

P0808

The ECM detects that the clutch pedal position (CPP) sensor voltage is greater than 4.75 V.

Action Taken When the DTC Sets

DTC P0806 is type A DTC.

Conditions for Clearing the DTC

The current DTC will clear when the fault is no longer present.

Reference Information

Schematic Reference

Manual Transmission Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Transmission System Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References

Circuit/System Verification

Ignition ON, observe the scan tool CPP Sensor parameter. The reading should be between 0.25 V and 4.75 V and change while the clutch pedal is pressed and released.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the clutch pedal position sensor.
2. Test for less than 2 Ω between the low reference circuit terminal and ground.

⇒	If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.

3. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal and ground.

⇒	If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.

⇒	If greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the ECM.

4. Verify the scan tool CPP Sensor parameter is greater than 4.75 V.

⇒	If less than the specified range, test the signal circuit terminal for a short to ground. If the circuit tests normal, replace the ECM.

5. Install a 3A fused jumper wire between the signal circuit terminal and the low reference circuit terminal. Verify the scan tool CPP Sensor parameter is less than.25 V.

⇒	If greater than the specified range, test the signal circuit for short to voltage or an open/high resistance. If the circuit tests normal, replace the ECM.

6. If all circuits test normal, test or replace the clutch pedal position sensor.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for ECM replacement, setup, and programming