Aisin AY6 - Manual Transmission
DTC P0807 or 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 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 Information
Circuit/System Description
The clutch pedal position (CPP) is a three wire sensor, connected to a 5 V reference circuit, a low reference circuit, and a signal circuit. The engine control module (ECM) 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
* DTCs P0641 or P0651 are not set.
* The system voltage is more than 9 V.
* The ignition is in the RUN position.
Conditions for Setting the DTC
P0807
The CPP sensor voltage is less than 0.1 V for more than 1 second.
P0808
The CPP sensor voltage is more than 5.2 V for more than 1 second.
Action Taken When the DTC Sets
P0807 and P0808 are Type A DTCs.
Conditions for Clearing the MIL/DTC
P0807 and P0808 are Type A DTCs.
Reference Information
Schematic Reference
Manual Transmission Schematics Aisin AY6 - Manual Transmission
Connector End View Reference
Component Connector End Views Fuel Pump and Level Sensor Assembly - Primary
Description and Operation
Transmission System Description and Operation Aisin AY6 - Manual Transmission
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 (LFX or LFW) Scan Tool Testing and ProceduresEngine Control Module Scan Tool Information (L77/LS3/LS7/L99) Scan Tool Testing and ProceduresEngine Control Module Scan Tool Information (LSA) Scan Tool Testing and Procedures for scan tool information
Circuit/System Verification
1. If DTC P0641 or P0651 is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.
2. Ignition ON, observe the scan tool CPP sensor percent parameter. The percentage should vary from 0 percent when the clutch pedal is released, to 100 percent when the clutch pedal is in the apply position.
3. Perform the CPP learn procedure. Refer to Clutch Pedal Position Sensor Learn Aisin AY6 - Manual Transmission.
4. After performing the above steps, verify that the DTC does not reset by operating the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions you observe from the Freeze Frame/Failure Records data. If the vehicle passes the Circuit/System Verification procedure, then STOP. Do not perform the Circuit/System Testing or Component Testing as this may result in an unnecessary part replacement. Refer to Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections.
Circuit/System Testing
Note:
You must perform the Circuit/System Verification first.
1. Ignition OFF, disconnect the harness connector of the CPP sensor.
2. Ignition OFF, test for less than 1 ohms between the low reference circuit terminal C and the negative post of the battery.
• If greater than the specified value, 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 A 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. Ignition ON, verify that the scan tool CPP sensor parameter is less than 0.1 V.
• If greater than the specified value, test the signal circuit for a short to voltage. If the circuit tests normal, replace the ECM.
5. Install a 3 A fused jumper wire between the signal circuit terminal B and the 5 V reference circuit terminal A. Verify that the scan tool CPP sensor parameter is between 4.8-5.2 V.
• If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
6. If all circuits test normal, replace the CPP sensor.
Component Testing
Note:
You must perform the Circuit/System Verification first.
1. Ignition OFF, disconnect the harness connector of the CPP sensor.
2. Measure the resistance between the signal terminal B and the low reference terminal C of the CPP sensor. Sweep the CPP sensor through the entire range. The resistance should vary low to high and high to low without any spikes or dropouts.
• If the resistance is erratic with spikes or dropouts, replace the CPP sensor.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Clutch Pedal Position Sensor Replacement Service and Repair
* Engine Control Module Replacement Service and Repair
* Engine Control Module Programming and Setup (LFW, LFX) Testing and InspectionEngine Control Module Programming and Setup (LSA, LS3, L99) Testing and Inspection