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Test Description

WARNING: This page is about a different car, the 2004 Chevrolet Monte Carlo and 2004 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

  1. 2:  Tests for the normal state of the TCS switch using a scan tool.
  2. 3:  Tests if the BCM is able to detect a change in TCS switch state.
  3. 4:  Tests for a stuck or shorted TCS switch. If the TCS switch is stuck or shorted, the state will change from On to Off when the TCS switch is disconnected.
  4. 5:  Tests for a short to ground in the TCS switch signal circuit.
  5. 8:  When the BCM is replaced, use a scan tool to perform the setup procedure. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.
DTC B2747

Step Action Yes No
Schematic Reference:  ABS Schematics  
Connector End View Reference:  ABS Connector End Views   or  Body Control System Connector End Views  in Body Control System
1 Did you perform the ABS Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - ABS 
2 
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, observe the TCS Switch State parameter in the BCM data list.
Does the scan tool display Off?		 Go to Step 3  Go to Step 4 
3 
  1. Activate the TCS switch.
  2. With the scan tool, observe the TCS Switch State parameter.
Does the TCS Switch State parameter change state?		 Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. Go to Step 4 
4 
  1. Turn OFF the ignition.
  2. Disconnect the TCS switch.
  3. Turn ON the ignition, with the engine OFF.
  4. With a scan tool, observe the TCS Switch State parameter.
Does the scan tool display Off?		 Go to Step 7  Go to Step 5 
5  Test the signal circuit of the TCS switch for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 10  Go to Step 6 
6 Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 10  Go to Step 8 
7 Inspect for poor connections at the harness connector of the TCS switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 10  Go to Step 9 
8 
IMPORTANT: Perform the setup procedure for the body control module. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.
Replace the BCM. Refer to Body Control Module Replacement in Body Control System.Did you complete the repair?		 Go to Step 10  -
9 Replace the traction control switch. Refer to Traction Control Switch Replacement (Impala) Traction Control Switch Replacement (Monte Carlo)  .
Did you complete the repair?		 Go to Step 10  -
10
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC reset?		 Go to Step 2  System OK
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