Traction Control/Stability Control Indicator Malfunction
Traction Control/Stability Control Indicator Malfunction
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 control/stability control-active indicator and stability control off indicator for 5 s after ignition ON. The electronic brake control module (EBCM) will request the instrument cluster via serial data to turn the traction control/stability control-active indicator ON (flashing) when the system is in traction control or stability control mode. When the EBCM detects a fault it sends a serial data message to the instrument cluster commanding the traction control/stability control-active indicator ON.
The body control module (BCM) monitors the traction control switch. When the traction control switch is pressed once, the BCM will request the EBCM via serial data to disable the traction control. When the traction control switch is pressed for 5 s, the BCM will request the EBCM to disable the stability control. The EBCM will request the instrument cluster via serial data to turn the 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 Sunshade - Left (DH6)
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 Control Module References
Circuit/System Verification
1. Ignition ON.
2. Verify the instrument cluster Traction Control indicator turns ON and OFF when commanding the Instrument Cluster All Indicators ON and OFF with a scan tool.
• If either indicator does not turn ON and OFF
Replace the P16 Instrument Cluster.
• If the indicators turn ON and OFF
3. Observe the scan tool BCM Traction Control Switch parameter while pressing and releasing the S48D Multifunction Switch 2 - Instrument Panel. Verify the reading changes between Active and Inactive.
• If the parameter does not change
Refer to Circuit/System Testing.
• If the parameter changes as commanded
4. Observe the scan tool EBCM Traction Control System parameter while pressing and releasing the S48D Multifunction Switch 2 - Instrument Panel. Verify the reading changes between ON and OFF.
• If the parameter does not change
Replace the K9 Body Control Module.
• If the parameter changes as commanded
5. All OK.
Circuit/System Testing
Note:
Circuit/System Verification must be performed before Circuit/System Testing.
1. Ignition OFF, key out, open and close the driver door, wait 30 s, disconnect the harness connector at the S48D Multifunction Switch 2 - Instrument Panel.
2. Test for less than 10 ohms between the ground circuit terminal 2 and ground.
• If 10 ohms or greater
Repair the open/high resistance in the circuit.
• If less than 10 ohms
3. Ignition ON.
4. Verify the scan tool BCM 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 terminal 7 at the S48D Multifunction Switch 2 - Instrument Panel 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 BCM Traction Control Switch parameter is Active.
• If not Active
1. Ignition OFF, disconnect the X2 harness connector at the K9 Body Control Module.
2. Ignition ON, test for less than 0.3 V between the signal circuit and ground.
• If greater than 0.3 V, repair the short to voltage on the circuit.
• If less than 0.3 V
3. Ignition OFF, 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 S48D Multifunction Switch 2 - Instrument Panel.
Component Testing
Static Test
1. Ignition OFF, disconnect the harness connector at the S48D Multifunction Switch 2 - Instrument Panel.
2. Test for infinite resistance between the signal circuit terminal 7 and the ground circuit terminal 2 with the switch in the released position.
• If less than infinite resistance
Replace the S48D Multifunction Switch 2 - Instrument Panel.
• If infinite resistance
3. Test for less than 5 ohms between the signal circuit terminal 7 and the ground circuit terminal 2 with the switch in the pressed position.
• If greater than 5 ohms
Replace the S48D Multifunction Switch 2 - Instrument Panel.
• If less than 5 ohms
4. All OK.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Instrument Panel Multifunction Switch Replacement Service and Repair
* Control Module References Control Module References for control module replacement, programming and setup