Traction Control/Stability Control Indicator Malfunction (With F55)
Traction Control/Stability Control Indicator Malfunction (With F55)
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.
Diagnostic Fault Information
Circuit/System Description
The Instrument Cluster illuminates the Traction/stability Control, Traction Control Off, and the Stability Control Off indicator for five seconds after ignition ON. The Electronic Brake Control Module will request the Instrument Cluster via serial data to turn the Traction/stability Control, Traction Control Off, and the Stability Control Off indicator ON when a fault is set or when the vehicle is entering the performance traction mode. When the Electronic Brake Control Module detects a fault it sends a serial data message to the Instrument Cluster commanding the Traction/stability Control indicator ON.
The Body Control Module monitors the traction control switch. When the traction control switch is pressed once, the Body Control Module will request the Electronic Brake Control Module via serial data to disable the traction control. When the Traction Control Switch is pressed twice within five seconds the performance traction mode is available and enters the Performance Traction Control Mode 2-Dry. The Electronic Brake Control Module will request the Instrument Cluster via serial data to turn the Traction Control Off indicator and Stability Control Off indicator ON to notify the driver of the deactivation.
Reference Information
Schematic Reference
Antilock Brake System Schematics [1][2]Antilock Brakes / Traction Control Systems
Connector End View Reference
Component Connector End Views Electronic Brake Control Module (EBCM)
Description and Operation
ABS Description and Operation (Without F55) ABS Description and Operation (Without F55)ABS Description and Operation (With F55) ABS Description and Operation (With F55)
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 Control Module References for scan tool information
Circuit/System Verification
1. Ignition ON.
2. Verify the Instrument Cluster indicators listed below turn ON and OFF when commanding the All Indicators ON and OFF with a scan tool.
* Traction/stability Control indicator
* Traction Control Off indicator
* Stability Control Off indicator
• If any indicator does not turn ON and OFF
Replace the P16 Instrument Cluster.
• If all indicators turn ON and OFF
3. Verify the scan tool Body Control Module Traction Control Switch parameter changes between Active and Inactive when pressing and releasing the S48E Multifunction Switch-Center Console.
• If the parameter does not change
Refer to Circuit/System Testing.
• If the parameter changes
4. All OK.
Circuit/System Testing
Note: Circuit/System Verification must be performed before Circuit/System Testing.
1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S48E Multifunction Switch-Center Console. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 5 ohms between the ground circuit terminal 2 and ground.
• If 5 ohms or greater
1. Ignition OFF.
2. 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 Body Control Module Traction Control Switch parameter is Inactive.
• If not Inactive
1. Ignition OFF, disconnect the X2 harness connector at the K9 Body Control Module.
2. Test for infinite resistance between the signal circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the K9 Body Control Module.
• If Inactive
5. Install a 3 A fused jumper wire between the signal circuit terminal 7 and ground.
6. Verify the scan tool Traction Control Switch parameter is Active.
• If not Active
1. Ignition OFF, disconnect the X2 harness connector at the K9 Body Control Module, ignition ON.
2. Test for less than 1 V between the signal circuit and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V
3. 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 K9 Body Control Module.
• If Active
7. Test or replace the S48E Multifunction Switch-Center Console.
Component Testing
1. Ignition OFF, disconnect the harness connector at the S48E Multifunction Switch-Center Console.
2. Test for infinite resistance between the signal circuit terminal 4 and the ground circuit terminal 2 with the switch in the open position.
• If less than infinite resistance
Replace the S48E Multifunction Switch-Center Console.
3. Test for less than 2 ohms between the signal circuit terminal 4 and the ground circuit terminal 2 with the switch in the closed position.
• If 2 ohms or greater
Replace the S48E Multifunction Switch-Center Console.
• If less than 2 ohms
4. All OK.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Electronic Traction Control Switch Replacement Service and Repair
* Control Module References Control Module References for Body Control Module replacement or Instrument Cluster, programming and setup