B0828
DTC B0828
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 Descriptor
DTC B0828
- Traction Control Switch Off Indicator Circuit High
Diagnostic Fault Information
Circuit/System Description
After the traction control switch (TCS) is pressed and released, the LED on the switch illuminates. The body control module (BCM) illuminates the LED by supplying adequate current to the high side of the LED.
Conditions for Running the DTC
* Ignition ON.
* Ignition voltage is greater than 10 V.
Conditions for Setting the DTC
The BCM detects high voltage on the traction control requested indicator control circuit when the LED is switched ON.
Action Taken When the DTC Sets
* The EBCM disables the Antilock Brake System (ABS), Traction Control System (TCS), and the Vehicle Stability Enhancement System for the duration of the ignition cycle.
* A DIC message and/or a warning indicator may be displayed.
Conditions for Clearing the DTC
* The condition for setting the DTC is no longer present.
* The EBCM clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.
Reference Information
Schematic Reference
Antilock Brake System Schematics (Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
ABS Description and Operation (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)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the appropriate control switch.
2. Test for less than 5 ohm between the ground circuit terminal listed below and ground.
* Traction Control Switch terminal A (with NP1)
* I/P Multifunction Switch terminal H (without NP1)
3. Ignition ON, verify the scan tool BCM TCS Switch State parameter is Released.
• If not the specified value, test the signal circuit terminal listed below for a short to ground. If the circuit test normal replace the BCM.
* Traction Control Switch terminal C (with NP1)
* I/P Multifunction Switch terminal J (without NP1)
4. Install a 3A fused jumper wire between the terminals listed below. Verify the scan tool BCM TCS Switch State parameter is Pressed.
* Traction Control Switch signal circuit terminal C and ground circuit terminal A (with NP1).
* I/P Multifunction Switch signal circuit terminal J and ground circuit terminal H (without NP1).
• If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit test normal replace the BCM.
5. If all circuits test normal, test or replace the control switch.
Component Testing
Traction Control Switch (With NP1)
1. Ignition OFF, disconnect the harness connector at the traction control switch.
2. Test for infinite resistance between the signal terminal C and the ground terminal A with the switch in the open position.
• If not the specified value, replace the traction control switch.
3. Test for less than 3 ohm between the signal terminal C and the ground terminal A with the switch in the closed position.
• If greater than the specified range, replace the traction control switch.
I/P Multifunction Switch (Without NP1)
1. Ignition OFF, disconnect the harness connector at the I/P multifunction control switch.
2. Test for infinite resistance between the signal terminal J and the ground terminal H with the switch in the open position.
• If not the specified value, replace the I/P multifunction control switch.
3. Test for less than 3 ohm between the signal terminal J and the ground terminal H with the switch in the closed position.
• If greater than the specified range, replace the I/P multifunction control switch.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Accessory Switch Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for BCM replacement, setup, and programming.