To the top of the document
Cruze
   
GMDE Start Page Load static TOC Load dynamic TOC Help?

DTC B2745

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.

DTC Descriptor

DTC B2745 02: Traction Control Switch Circuit Short to Ground

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Traction Control Switch Signal

B2745 02

1

1

--

Traction Control Switch Ground

--

1

1

--

1. Traction Control Switch Inoperative

Circuit/System Description

The body control module (BCM) monitors the traction control switch. When the traction control switch is pressed for less than 5 s, the BCM will request the electronic brake control module (EBCM) via serial data to disable the traction control system. When the traction control switch is pressed for 5 s, the BCM will request the EBCM to disable the stability control system. The EBCM will request the instrument cluster via serial data to turn the traction control off Indicator and/or the stability control off indicator ON to notify the driver of the deactivation.

Conditions for Running the DTC
    • Ignition ON
    • Ignition voltage is greater than 8 V.

Conditions for Setting the DTC

B2745 02

The BCM detects a short to ground on the signal circuit

Action Taken When the DTC Sets

The BCM ignores the traction control switch signal input.

Conditions for Clearing the DTC

A current DTC clears when the diagnostic runs and passes.

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, that during the bulb check, the Traction Control/Stability Control Active indicator, Traction Control Off indicator and the Stability Control Off indicator illuminate briefly.
    3. [ARW-LISTFAIL]

  3. If either indicator does not illuminate briefly

    Refer to Traction Control/Stability Control Indicator Malfunction .

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

  4. If the indicators do illuminate briefly

    5. [/ARW-LISTPASS]
  5. With a scan tool, verify the scan tool EBCM Traction and Stability Control Switch parameters change from NO to YES when pressing the S75 Traction Control Switch shortly and then for 5 s.
    6. [ARW-LISTFAIL]

  6. If either of the parameters does not change

    Refer to Circuit/System Testing below.

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

  7. If both parameters change from NO to YES

    8. [/ARW-LISTPASS]
  8. Verification complete, refer to Testing for Intermittent Conditions and Poor Connections .

Circuit/System Testing

  1. Ignition OFF. Disconnect the S75 Traction Control Switch harness connector.
  2. Ignition ON, verify the scan tool BCM Traction Control Switch parameter is NO.
    3. [ARW-LISTFAIL]

  3. If parameter is not NO

    4. [/ARW-LISTFAIL]
    2.1. Ignition OFF, disconnect the harness connector X2 at the K9 Body Control Module, ignition ON
    2.2. Test for infinite resistance between the signal circuit connector terminal 14 and ground.
    [ARW-LISTFAIL]

  4. If not infinite resistance, repair the short to ground on the circuit.

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

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

  6. If parameter is NO

    7. [/ARW-LISTPASS]
  7. Replace the S75 Traction Control Switch.

Component Testing

Static Test

  1. Test for more than 5 Ω between S75 Traction Control Switch terminal 2 and terminal 4 with the switch in the released position.
    2. [ARW-LISTFAIL]

  2. If less than 5 Ω

    Replace the S75 Traction Control Switch.

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

  3. If more than 5 Ω

    4. [/ARW-LISTPASS]
  4. Test for less than 5 Ω between S75 Traction Control Switch terminal 2 and terminal 4 with the switch pressed.
    5. [ARW-LISTFAIL]

  5. If greater than 5 Ω

    Replace the S75 Traction Control Switch.

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

  6. If less than 5 Ω

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

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for BCM replacement, setup and programming

   


© Copyright Chevrolet. All rights reserved