GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1998 🢒 DeVille 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Traction Off Message Inoperative

Object Number: 413329 Size: LF
ABS Components
Cell 44: Stoplamp Switch, Traction Control Switch, Torque Status, andClass 2
Handling ESD Sensitive Parts Notice
Cell 14: G205

Circuit Description

The TRACTION OFF message is controlled by the EBTCM. When the EBTCM sees the Traction Control Switch Input grounded through the momentary traction control switch, it disables Traction Control and sends a class 2 serial data message to the instrument cluster (IPC) to turn the TRACTION OFF message on. Each time the ignition switch is cycled OFF to ON, Traction Control is enabled.

Diagnostic Aids
    • Perform a thorough inspection of the wiring and the connectors. Failure to carefully and fully inspect wiring and connectors may result in misdiagnosis, causing part replacement with reappearance of the malfunction.
    • An intermittent malfunction may be caused by poor connections, broken insulation, or a wire that is broken inside the insulation.
    • If an intermittent malfunction exists, refer to Intermittents and Poor Connections .

Test Description

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

  1. This step tests the state of the traction control switch.

    2.

  2. This step tests the traction control switch and circuit for a short to ground.

    3.

  3. This step tests the instrument cluster for the ability to operate the TRACTION OFF message. The EBTCM sends a serial data class 2 message to the instrument cluster. This test is done to see if the EBTCM can not send the message or the instrument cluster can not receive the message and act on the message properly.

Step

Action

Value(s)

Yes

No

1

Did you perform the ABS Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check

2

  1. Turn OFF the ignition.
  2. Connect a scan tool to the data link connector (DLC).
  3. Turn ON the ignition, with the engine OFF.
  4. Use the scan tool in order to select the ABS/TCS/ICCS Data List 2.
  5. Observe the TCS On/Off Switch parameter.
  6. Press and then release the traction control switch.

Does the scan tool display indicate the parameter changes status?

--

Go to Step 3

Go to Step 4

3

  1. Use the scan tool in order to select the ABS/TCS/ICCS Data List 2.
  2. Observe the Traction Off Message Command parameter.
  3. Press and then release the traction control switch.

Does the scan tool display indicate the parameter changes status?

--

Go to Step 7

Go to Step 8

4

  1. Turn OFF the ignition.
  2. Disconnect the EBTCM connector.
  3. Install the J 39700 universal pinout box using the J 39700-25 cable adapter to the EBTCM harness connector only.
  4. Press and hold the traction control switch.
  5. Use the J 39200 in order to measure the resistance between the J 39700 terminal 24 and terminal B.

Is the resistance within the specified range?

OL (Infinite)

Go to Step 5

Go to Step 8

5
  1. Disconnect the traction control switch connector.
  2. Connect a fused jumper from the traction control switch connector terminal A to ground.
  3. Use the J 39200 in order to measure the resistance between the J 39700 terminal 24 and terminal B.

Is the resistance within the specified range?

OL (Infinite)

Go to Step 9

Go to Step 6

6
  1. Use the J 39200 in order to measure the resistance between the traction control switch terminal A and terminal B.
  2. Press and then release the traction control switch.

Is the resistance within the specified range?

OL (Infinite)

Go to Step 10

Go to Step 11

7

Suspect the instrument cluster. Refer to Diagnostic System Check - Instrument Cluster in Instrument Panel, Gauges and Console.

Did you complete the repair?

--

Go to Diagnostic System Check

--

8

Replace the EBTCM. Refer to Electronic Brake Control Module Replacement .

Did you complete the repair?

--

Go to Diagnostic System Check

--

9

Repair the open in CKT 1571. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Diagnostic System Check

--

10

Replace the traction control switch. Refer to Instrument Panel Storage Compartment Replacement in Instrument Panel, Gauges and Console.

Did you complete the repair?

--

Go to Diagnostic System Check

--

11

Repair the open in CKT 151. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Diagnostic System Check

--