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Traction Control/Stability Control Indicator Malfunction

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.

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Stability Control Switch SIgnal

B2745 02

1

1

--

Stability Control Switch Ground

--

1

--

--

1. Stability Control Switch Inoperative

Circuit/System Description

The instrument cluster illuminates the traction control/stability control active indicator, winter 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 stability control switch. When the stability control switch is pressed once, the BCM will request the EBCM via serial data to disable the traction control. When the stability 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 winter indicator and stability control off indicator ON to notify the driver of the deactivation.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

ABS Description and Operation

Electrical Information Reference

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

Scan Tool Reference

Control Module References for scan tool information

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.
    3. [ARW-LISTFAIL]

  3. If either indicator does not turn ON and OFF

    Replace the P16 Instrument Cluster.

    4. [/ARW-LISTFAIL][ARW-LISTPASS]

  4. If the indicators turn ON and OFF

    5. [/ARW-LISTPASS]
  5. Observe the scan tool BCM Traction Control Switch parameter while pressing and releasing the traction control switch. Verify the reading changes between Active and Inactive.
    6. [ARW-LISTFAIL]

  6. If the parameter does not change

    Refer to Circuit/System Testing.

    7. [/ARW-LISTFAIL][ARW-LISTPASS]

  7. If the parameter changes as commanded

    8. [/ARW-LISTPASS]
  8. All OK.

Circuit/System Testing

Note: Circuit/System Verification must be performed before Circuit/System Testing.

  1. Ignition OFF, disconnect the harness connector at the S75 Traction Control Switch.
  2. Test for less than 5 Ω between the ground circuit terminal 4 and ground.
    3. [ARW-LISTFAIL]

  3. If 5 Ω or greater

    Repair the open/high resistance in the circuit.

    4. [/ARW-LISTFAIL][ARW-LISTPASS]

  4. If less than 5 Ω

    5. [/ARW-LISTPASS]
  5. Ignition ON, verify the scan tool BCM Traction Control Switch parameter is Inactive.
    6. [ARW-LISTFAIL]

  6. If not Inactive

    7. [/ARW-LISTFAIL]
    3.1. Ignition OFF, disconnect the X2 harness connector at the K9 BCM.
    3.2. Test for infinite resistance between the signal circuit terminal 2 at the S75 Traction Control Switch and earth.
    [ARW-LISTFAIL]

  7. If less than infinite resistance, repair the short to ground on the circuit.

  8. If infinite resistance, replace the K9 Body Control Module.

    9. [/ARW-LISTFAIL] [ARW-LISTPASS]

  9. If Inactive

    10. [/ARW-LISTPASS]
  10. Install a 3 A fused jumper wire between the signal circuit terminal 2 and ground.
  11. Verify the scan tool BCM Traction Control Switch parameter is Active.
    12. [ARW-LISTFAIL]

  12. If not Active

    13. [/ARW-LISTFAIL]
    5.1. Ignition OFF, disconnect the X2 harness connector at the K9 BCM.
    5.2. Ignition ON, test for less than 0.3 V between the signal circuit and ground.
    [ARW-LISTFAIL]

  13. If greater than 0.3 V, repair the short to voltage on the circuit.

    14. [/ARW-LISTFAIL][ARW-LISTPASS]

  14. If less than 0.3 V

    15. [/ARW-LISTPASS]
    5.3. Ignition OFF, test for less than 2 Ω in the signal circuit end to end.
    [ARW-LISTFAIL]

  15. If 2 Ω or greater, repair the open/high resistance in the circuit.

  16. If less than 2 Ω, replace the K9 Body Control Module.

    17. [/ARW-LISTFAIL] [ARW-LISTPASS]

  17. If Active

    18. [/ARW-LISTPASS]
  18. Test or replace the S75 Traction Control Switch.

Component Testing

Static Test

  1. Ignition OFF, disconnect the harness connector at the S75 Traction Control Switch.
  2. Test for infinite resistance between the signal circuit terminal 2 and the ground circuit terminal 4 with the switch in the released position.
    3. [ARW-LISTFAIL]

  3. If less than infinite resistance

    Replace the S75 Traction Control Switch.

    4. [/ARW-LISTFAIL][ARW-LISTPASS]

  4. If infinite resistance

    5. [/ARW-LISTPASS]
  5. Test for less than 5 Ω between the signal circuit terminal 2 and the ground circuit terminal 4 with the switch in the pressed position.
    6. [ARW-LISTFAIL]

  6. If greater than 5 Ω

    Replace the S75 Traction Control Switch.

    7. [/ARW-LISTFAIL][ARW-LISTPASS]

  7. If less than 5 Ω

    8. [/ARW-LISTPASS]
  8. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for BCM replacement, programming setup

   


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