GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1998 🢒 Regal 🢒 Brakes 🢒 Antilock Brake System 🢒 Traction Control Indicator Always On

Object Number: 247781 Size: MF

Circuit Description

This symptom table checks the following conditions:

    • Checks the state of the TCS (TRAC OFF) indicator to identify a situation in which the TCS (TRAC OFF) indicator did not warn the driver of a system malfunction.
    • The TCS (TRAC OFF) indicator is always ON.

The EBTCM sends a message to the electronic instrument panel cluster (IPC) via the Serial Data Line and the IPC will illuminate the indicator lamp(s).

Diagnostic Aids

Use the lamp test function of the scan tool in order to command the indicator ON while looking for an malfunction in the TCS (TRAC OFF) indicator.

Step

Action

Value(s)

Yes

No

1

Was the Diagnostic System Check performed?

--

Go to Step 2

Go to Diagnostic System Check

2
  1. Turn the ignition switch to the OFF position.
  2. Install a Scan Tool .
  3. Turn the ignition switch to the RUN position.
  4. Use the Scan Tool in order to select OUTPUT CONTROL .
  5. Use the Scan Tool in order to select WOW CLUSTER.
  6. Use the Scan Tool in order to turn the amber TCS (TRAC OFF) indicator on.

Did the amber TCS (TRAC OFF) indicator turn on?

--

System OK

Go to Step 3

3

Repair the instrument panel cluster.

Refer to Instrument Cluster, Cell 81, in Electrical Diagnosis.

Is the repair complete?

--

Go to Diagnostic System Check

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