Chevrolet Trax: DTC B2745 (WITH C67/CJ2): Traction control switch
DIAGNOSTIC CODE INDEX
DTC B2745 (WITH C67/CJ2): Traction control switch
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 Descriptors
DTC B2745 02
Traction Control Switch Circuit Short to Ground
DTC B2745 71
Traction Control Switch Circuit Invalid Data
Diagnostic Fault Information
Circuit/System Description
The instrument cluster illuminates the traction/stability control indicator,
the traction control off and the
stability control off indicator for five seconds after the ignition is turned ON.
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 signal circuit from the traction control
switch. When the traction control
switch is pressed once, the body control module sends a serial data message to
the electronic brake control
module to disable the traction control system. The electronic brake control
module will request the instrument
cluster to turn the traction control off indicator ON to notify the driver of
the deactivation. When the traction
control switch is pressed and held for five seconds, the body control module
will request the electronic brake
control module to disable the electronic stability control. The electronic brake
control module will request the
instrument cluster to turn 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 body control module detects a short to ground on the signal circuit.
B2745 71
The body control module detects an erratic signal from the traction control
switch.
Action Taken When the DTC Sets
- The electronic brake control module stores DTC.
- The electronic brake control module disables the vehicle stability for
the duration of the ignition cycle.
Conditions for Clearing the DTC
- The conditions for setting the DTC are no longer present.
- The electronic brake control module clears the history DTC when a
current DTC is not detected in 40
consecutive drive cycles.
Reference Information
Schematic Reference
Antilock Brake System Schematics (Encore), Antilock Brake System
Schematics (Trax)
Connector End View Reference
WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS -
INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT
CONNECTOR END VIEWS - INDEX - (Trax)
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
- Ignition ON.
- 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 the indicator does not turn On and Off
Replace the P16 Instrument Cluster.
If the indicator turns On and Off
- Verify the scan tool Traction Control Switch parameter changes between
Active and Inactive while
pressing and releasing the traction control switch.
If the parameter does not change
Refer to Circuit/System Testing.
If the parameter changes
- All OK.
Circuit/System Testing
- Ignition OFF, scan tool disconnected, 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.
- Test for less than 10 ohms between the ground circuit terminal 7 and
ground.
If 10 ohms or greater
- Ignition OFF.
- 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 10 ohms
- Ignition ON.
- Verify the scan tool Body Control Module Traction Control Switch
parameter is Inactive.
If not Inactive
- Ignition OFF, disconnect the X2 harness connector at the K9 Body Control
Module.
- Test for infinite resistance between the signal circuit terminal 14 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
- Install a 3 A fused jumper wire between the signal circuit terminal 9
and the ground circuit terminal 7.
- Verify the scan tool Traction Control Switch parameter is Active.
If not Active
- Ignition OFF, disconnect the X2 harness connector at the K9 Body Control
Module, ignition ON.
- 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
- 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
- Test or replace the S48E Multifunction Switch - Center Console.
Component Testing
- Ignition OFF, disconnect the harness connector at the S48E Multifunction
Switch - Center Console.
- Test for infinite resistance between the signal terminal 9 and the
ground terminal 7 with the switch in the
open position.
If less than infinite resistance
Replace the S48E Multifunction Switch - Center Console.
If infinite resistance
- Test for less than 2 ohms between the signal terminal 9 and the ground
terminal 7 with the switch in the
closed position.
If 2 ohms or greater
Replace the S48E Multifunction Switch - Center Console.
If less than 2 ohms
- All OK.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
- Vehicle Stability Control System Switch Replacement
- Control Module References for Body Control Module, Electronic Brake
Control Module or Instrument
Cluster replacement, programming and setup
READ NEXT:
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.
Diag
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.
Diag
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.
Diag
SEE MORE:
To remove the fuse block cover,
squeeze the clip and lift it up.
Caution
Spilling liquid on any electrical
component on the vehicle may
damage it. Always keep the
covers on any electrical
component.
The vehicle may not be equipped
with all of the fuses, relays, and
features shown.
Mini Fuses&nbs
NOTE: To determine the appropriate reset procedure, refer to CHECK
ENGINE LIGHT
RESET INDEX. Only vehicles listed in this index have a check engine light reset.
CHECK ENGINE LIGHT RESET INDEX
CHECK ENGINE LIGHT RESET - PROCEDURE 1
Federal Emissions
CHECK ENGINE light functions as a service remi