LOW TRAC Indicator Inoperative. Pontiac Bonneville 2000

For 1990-2009 cars only

Makes 🢒 Pontiac 🢒 2000 🢒 Bonneville 🢒 Brakes 🢒 Antilock Brake System 🢒 LOW TRAC Indicator Inoperative

LOW TRAC Indicator Inoperative w/NW9

ABS Components
Indicators and Traction Control Switch
Handling ESD Sensitive Parts Notice
Serial Data Class 2
Serial Data Class 2
G201 (2 of 3)
G201 (1 of 3)

Circuit Description

The LOW TRAC indicator is controlled by the instrument cluster via class 2 serial data messages from the EBCM. When the ABS, TCS, or VSES is active for 0.5 seconds, the EBCM commands the instrument cluster to turn ON the LOW TRAC indicator.

The LOW TRAC indicator will also turn ON during the instrument cluster bulb check. When the ignition switch is turned to ON, the LOW TRAC indicator will turn ON for approximately 3 seconds and then turn OFF.

Test Description

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

This test uses the scan tool to check the normal state of the LOW TRAC indicator control.

This test ensures that the instrument cluster can operate the LOW TRAC indicator.

Step

Action

Value(s)

Yes

Did you perform the ABS Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - ABS

With a scan tool, observe the TCS Active Indicator/Message parameter in the DRP/ABS/TCS/TIM data list.

Does the scan tool display Off?

Go to Step 3

Go to Step 4

Turn OFF the ignition.
Turn ON the ignition, with the engine OFF.
Observe the ABS indicator on the instrument cluster (IPC) during the bulb check.

Does the LOW TRAC indicator illuminate during the bulb check and then turn OFF?

Go to Step 4

Go to Step 5

Inspect for poor connections at the harness connector of the EBCM. 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

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

Important: Perform the setup procedure for the EBCM. An unprogrammed EBCM will result in the following conditions:

•	Inoperative or poorly functioning DRP/ABS/TCS/VSES/VES/TIM (if equipped)

•	Set DTC C1248 EBCM Turned the Red Brake Warning Indicator On

•	Set DTC C1255m3 EBCM Internal Malfunction

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

Did you complete the repair?

Go to Step 8

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

Did you complete the repair?

Go to Step 8

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2