Chevrolet Trax: DTC P080A: Clutch pedal position (CPP) Not learned

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC P080A

Clutch Pedal Position (CPP) Not Learned

Circuit/System Description

The clutch pedal position (CPP) is a 3-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 near 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

Clutch pedal fully applied.

Conditions for Setting the DTC

Clutch pedal position not learned.

Action Taken When the DTC Sets

P080A is a Type A DTC.

Conditions for Clearing the DTC

P080A is a Type A DTC.

Reference Information

Schematic Reference

Manual Transmission Schematics (Encore, MR5), Manual Transmission Schematics (Trax, MR5)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Transmission System Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (LUV) , Powertrain Diagnostic Trouble Code (DTC) Type Definitions (2H0)

Scan Tool Reference

K20 Engine Control Module: Scan Tool Information (LUV or 2H0)

Circuit/System Verification

Perform the clutch pedal position sensor learn procedure.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

• Clutch Pedal Position Sensor Learn
• Control Module References for replacement, programming and setup.

DTC P0812: REVERSE POSITION SWITCH CIRCUIT

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC P0812

Reverse Position Switch Circuit

Diagnostic Fault Information

Reverse Position Switch

Typical Scan Tool Data

Reverse Position Switch

Circuit/System Description

The Backup Lamp (Reverse Position) switch is a two wire switch mounted on the transmission assembly. The Backup Lamp switch is connected to a 12 V signal circuit from the engine control module (ECM). The ground circuit is connected to chassis ground. The Backup Lamp switch is a normally open switch. The voltage on the Backup Lamp switch signal circuit to the ECM is HIGH when the switch is open and the transmission is in Neutral or another forward gear. The voltage on the Backup Lamp switch signal circuit to the ECM is LOW when the switch is closed and the transmission is in the reverse position. When the transmission is placed in the reverse position, the ECM sends a serial data message to the Body Control Module (BCM). The message indicates that the gear selector is in the reverse position. The BCM applies battery voltage to the backup lamps.

When the gear selector is moved out of the reverse position, a message is sent by the ECM via serial data requesting the BCM to remove battery voltage from the backup lamp control circuit.

Conditions for Running the DTC

P0812

• The system voltage is greater than 9 V.
• The ignition is in the RUN position.

Conditions for Setting the DTC

P0812

The Backup Lamp switch signal circuit is high with the transmission in reverse

Action Taken When the DTC Sets

DTC P0812 is a Type B DTC.

Conditions for Clearing the DTC

DTC P0812 is a Type B DTC.

Reference Information

Schematic Reference

Exterior Lights Schematics (Encore) , Exterior Lights Schematics (Trax)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (LUV) , Powertrain Diagnostic Trouble Code (DTC) Type Definitions (2H0)

Scan Tool Reference

K20 Engine Control Module: Scan Tool Information (LUV or 2H0) for scan tool information

Circuit/System Verification

1. Ignition ON, verify the scan tool Reverse Position Switch parameter changes between On when the transmission is in reverse and Off when the transmission is in neutral.

• If the Reverse Position Switch parameter does not change states

Refer to Circuit/System Testing below.

• If the Reverse Position Switch parameter does change states

2. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
3. Verify the DTC does not set.

If the DTC sets

Refer to Circuit/System Testing.

If the DTC does not set

4. All OK.

Circuit/System Testing

NOTE: You must perform the Circuit/System Verification first.

1. Ignition OFF, disconnect the harness connector at the B16 Backup Lamp Switch.
2. Test for less than 5 ohms between the ground circuit terminal 2 and ground.

If 5 ohms or greater

1. Test for less than 2 ohms in the ground circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.

If less than 5 ohms

3. Ignition ON.
4. Verify the scan tool Reverse Switch parameter is Off.

If the parameter is On

1. Ignition OFF, disconnect the X3 harness connector at the K20 Engine Control Module.
2. Test for infinite resistance between the signal circuit terminal 1 and ground.

• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the K20 Engine Control Module.

If the parameter is Off

5. Ignition ON, install a 3 A fused jumper wire between the signal circuit terminal 1 and the ground circuit terminal 2.
6. Verify the scan tool Reverse Switch parameter is On.

If the parameter is Off

1. Ignition Off, remove the jumper wire, disconnect the X3 harness connector at the K20 Engine Control Module.
2. Test for less than 2 ohms in the signal circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K20 Engine Control Module.

If the parameter is On

7. Test or replace the B16 Backup Lamp Switch.

Component Testing

Static Test

1. Ignition OFF, disconnect the electrical harness connector of the B16 Backup Lamp switch.
2. With the transmission in Reverse and the Backup Lamp switch closed, measure for less than 2 ohms between the signal circuit terminal 1 and the ground circuit terminal 2 on the B16 Backup Lamp switch.

If 2 ohms or greater

Replace the B16 Backup Lamp Switch.

If less than 2 ohms

3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

• Backup Lamp Switch Replacement
• Control Module References for ECM replacement, programming and setup.

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