GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1997 🢒 Corvette 🢒 Body and Accessories 🢒 Body Control System 🢒 Traction Off Indicator Inoperative

Object Number: 95922 Size: MF
ABS Components
ABS/TCS Schematics

Circuit Description

The Body Control Module (BCM) receives the input from the Traction Control Switch, the BCM then sends a class 2 message to the EBTCM telling the EBTCM the state of the switch. The BCM supplies 12 volts to the TCS switch, when the TCS switch is depressed the BCM sees the voltage go low and sends the EBTCM the message that the TCS switch state has changed. When the EBTCM receives the message from the BCM that the switch state has changed it turns On or Off Traction Control depending on its previous state.

Test Description

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

  1. Checks if the Body Control Module is receiving a Traction Control Switch input.

    2.

  2. Checks if the EBTCM is receiving a Traction Control Switch message from the Body Control Module.

    3.

  3. Checks if the Body Control Module or the Traction Control Switch is at fault.

Traction Off Indicator Inoperative with No DTC Set

Step

Action

Value(s)

Yes

No

DEFINITION: The Traction Off indicator (car icon) does not come On when the Traction Control Switch is pressed to disable the Traction Control System.

1

Was the Diagnostic System Check performed?

--

Go to Step 2

Go to Diagnostic System Check

2
  1. Turn the ignition switch to the ON position, engine OFF.
  2. Using a scan tool in the Body Control Module Data List read the TCS Switch state as you press and release the TCS Switch.

Does the TCS Switch state change properly as the switch is pressed and released?

--

Go to Step 3

Go to Step 9

3

Using a scan tool in ABS/TCS Special Functions read the TCS Switch Status as you press and release the TCS Switch.

Does the TCS Switch state change properly as the switch is pressed and released?

--

Go to Step 5

Go to Step 4

4

Replace the EBTCM. Refer to Electronic Brake and Traction Control Module .

Is the replacement complete?

--

Go to Diagnostic System Check

--

5

Using a scan tool in the Instrument Panel (IPC) Special Functions attempt to turn the Traction Lamp (car icon) On.

Did the Traction Lamp turn On?

--

Go to Step 4

Go to Step 6

6
  1. Turn the ignition switch to the OFF position.
  2. Check the Traction Off (car icon) indicator bulb. Refer to Instrument Cluster Indicator Lamp Replacement in Instrument Panel, Gauges and Console.

Is the Traction Off Indicator (car icon) bulb OK?

--

Go to Step 8

Go to Step 7

7

Replace the Traction Off Indicator bulb. Refer to Instrument Cluster Indicator Lamp Replacement in Instrument Panel, Gauges and Console.

Is the replacement complete?

--

Go to Diagnostic System Check

--

8

Replace the Instrument Panel Cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console.

--

Go to Diagnostic System Check

--

9
  1. Remove the Traction Control Switch and disconnect the connector. Refer to Electronic Traction/Suspension Control Switch .
  2. Using a scan tool in the Body Control Module Data List read the TCS Switch status.
  3. Connect a jumper wire between terminals 7 and 5 of the Traction Control Switch harness connector.

Does the TCS Switch status read pressed with the jumper wire connected?

--

Go to Step 10

Go to Step 11

10

Replace the Traction Control Switch. Refer to Electronic Traction/Suspension Control Switch .

Is the replacement complete?

--

Go to Diagnostic System Check

--

11
  1. Turn the ignition switch to the OFF position.
  2. Using J 39200 DMM, measure the resistance between the Traction Control Switch harness connector terminal 5 and ground.

Is the resistance within the range specified in the value(s) column?

0 - 5ohms

Go to Step 13

Go to Step 12

12

Repair CKT 150 for an open or high resistance. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Diagnostic System Check

--

13
  1. Disconnect the Body Control Module connector C2.
  2. Using J 39200 DMM, measure the resistance between the Traction Control Switch harness connector terminal 7 and the Body Control Module Connector C2 terminal D15.

Is the resistance within the range specified in the value(s) column?

0 - 5ohms

Go to Step 15

Go to Step 14

14

Repair CKT 1571 for an open or high resistance. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Diagnostic System Check

--

15

Replace the Body Control Module. Refer to Body Control Module Replacement in Body Control System.

Is the replacement complete?

--

Go to Diagnostic System Check

--