GM Service Manual Online
For 1990-2009 cars only

Traction Ready Indicator Always On w/NW9

Circuit Description

The Traction Ready indicator is located on the traction control switch and is controlled by the instrument panel cluster (IPC) via serial data messages from the electronic brake control module (EBCM). The indicator is illuminated when the traction control system (TCS) is ready to be activated, if necessary. When the EBCM disables the TCS, it sends a serial data message to the IPC. The IPC then turns OFF the Traction Ready indicator. Each time the ignition is cycled from OFF to ON, the TCS is enabled.

Step

Action

Yes

No

Schematic Reference: Antilock Brake System Schematics

Connector End View Reference: Antilock Brake System Connector End Views or Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gages, and Console

1

Did you perform the ABS Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - ABS

2

  1. Turn OFF the ignition.
  2. Disconnect the instrument cluster.
  3. Turn ON the ignition, with the engine OFF.

Does the Traction Ready indicator turn OFF?

Go to Step 5

Go to Step 3

3

Test the traction ready indicator control circuit of the traction control switch for an short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 8

Go to Step 4

4

Inspect for poor connections at the harness connector of the traction control 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 8

Go to Step 6

5

Inspect for poor connections at the harness connector of the instrument cluster (IPC). 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 8

Go to Step 7

6

Replace the traction control switch. Refer to Electronic Traction Control Switch Replacement .

Did you complete the repair?

Go to Step 8

--

7

Replace the instrument cluster (IPC). Refer to Instrument Cluster Replacement in Instrument Panel, Gages and Console.

Did you complete the repair?

Go to Step 8

--

8

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2