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Home >> Chevy Truck >> 2013 >> Silverado 3500 4WD V8-6.0L (CNG) >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> P Code Charts >> P0831

P0831




DTC P0831 or P0833

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 P0831

-
Clutch Pedal Switch 1 Circuit Low Voltage

DTC P0833

-
Clutch Pedal Switch 2 Circuit

Diagnostic Fault Information










Typical Scan Tool Data






Circuit/System Description

The clutch pedal switch assembly consists of two internal switches. The clutch pedal switch 1 circuit consists of a B+ circuit from the powertrain relay in the underhood electrical center and a signal circuit to the engine control module (ECM). The clutch pedal switch 1 is closed when the clutch pedal is in the full release position or at the top of clutch pedal travel. The clutch pedal switch 2 consists of a 5 volt signal circuit from the ECM and a ground circuit to chassis ground. The clutch pedal switch 2 is open with the clutch pedal depressed or at the bottom of clutch pedal travel.

Conditions for Running the DTC

DTC P0831

* The ignition voltage is greater than 9 volts.

* The engine speed is greater than 700 RPM.

* Engine torque is greater than 75 Nm (55 lb ft).

* Accelerator pedal position is greater than 10 percent.

* Vehicle speed is greater than 20 km/h (13 mph).

DTC P0833

* The ignition voltage is greater than 9 volts.

* The engine speed is greater than 700 RPM.

* Engine torque is greater than 75 Nm (55 lb ft).

* Vehicle speed is greater than 20 km/h (13 mph).

* Clutch pedal switch transitions are equal to zero.

Conditions for Setting the DTC

DTC P0831

The ECM detects the bottom of travel clutch switch is continuously closed.

DTC P0833

The ECM detects the top of travel clutch switch is continuously open.

Action Taken When the DTC Sets

* DTC P0831 is a Type C DTC.

* DTC P0833 is a Type B DTC.

Conditions for Clearing the DTC

* DTC P0831 is a Type C DTC.

* DTC P0833 is a Type B DTC.

Diagnostic Aids

This test procedure requires that the battery is completely charged. Refer to Battery Inspection/Test Battery Inspection/Test.

Reference Information

Schematic Reference

Manual Transmission Schematics (MQ7) Manual Transmission Schematics (MQ7)

Connector End View Reference

Component Connector End Views 1-2 Shift Solenoid (SS) Valve (M30)

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

Scan Tool Reference

Engine Control Module Scan Tool Information (LU3) Scan Tool Testing and ProceduresEngine Control Module Scan Tool Information (Hybrid w/Tech 2) Scan Tool Testing and ProceduresEngine Control Module Scan Tool Information (LGH or LML) Scan Tool Testing and ProceduresEngine Control Module Scan Tool Information (V8) Scan Tool Testing and ProceduresEngine Control Module Scan Tool Information (Heavy Duty L96) Scan Tool Testing and Procedures

Circuit/System Verification

1. Brake applied and clutch pedal in the full release position. Attempt to start the engine. The engine should not start and run.

2. Brake applied and clutch pedal fully depressed to the floor. Attempt to start the engine. The engine should start and run.

3. 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 clutch switch wire harness electrical connector.

2. Ignition OFF, test for less than 5 ohms between terminals C on the clutch switch wire harness electrical connector and ground at the negative battery terminal.

• If greater than the specified value, test the ground circuit for an open/high resistance.

3. Ignition ON, verify that a test lamp illuminates on the ignition 1 voltage circuit at terminal F on the clutch switch wire harness electrical connector.

• If the test lamp does not illuminate, test the ignition 1 voltage circuit for a short to ground, or an open/high resistance.

4. Ignition ON, test for 4.8-5.2 volts on the 5 volt reference circuit terminal D on the clutch switch wire harness electrical connector.

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

• If less than the specified range, test the 5 volt reference circuit for an open/high resistance. If the circuit tests normal replace the ECM.

5. Ignition OFF, disconnect the X1 connector at the ECM.

6. Ignition ON, verify that a test lamp does not illuminate at terminal E on the clutch switch wire harness electrical connector.

• If the test lamp illuminates, test the signal circuit wire harness between the ECM and the clutch switch for a short to battery voltage.

7. Ignition OFF, connect a 3 amp fused jumper wire between terminals E and terminal F at the clutch switch wire harness electrical connector.

8. Ignition ON, verify that a test lamp illuminates at connector X1, terminal 6 on the ECM wire harness electrical connector.

• If the test lamp does not illuminate, test the signal circuit wire between the ECM and the clutch switch for a short to ground or an open/high resistance.

9. Ignition OFF, clutch pedal in the full release position, test for less than 5 ohms between terminal E and terminal F on the clutch switch assembly.

• If greater than the specified value, replace the clutch switch assembly.

10. Ignition OFF, clutch pedal fully depressed to the floor, test for infinite resistance between terminal C and terminal D on the clutch switch assembly.

• If less than the specified value, replace the clutch switch assembly.

Repair Verification

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

* Clutch Pedal Engine Start Switch Replacement Service and Repair

* Engine Control Module Replacement Service and Repair

* Engine Control Module Programming and Setup (LGH or LML) Testing and InspectionEngine Control Module Programming and Setup (Gasoline Engines) Testing and Inspection

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