ABS Indicator Always On. Chevrolet Malibu 1999

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 1999 🢒 Malibu 🢒 Brakes 🢒 Antilock Brake System 🢒 ABS Indicator Always On

ABS Components
Antilock Brake System Schematics
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice

Circuit Description

Two-way serial communication is sent back and forth between the EBCM and the IPC. A message from the IPC is sent to the EBCM within seven seconds after ABS initialization. A serial communication failure does not allow the proper warning indicator commands to be sent back to the IPC.

Diagnostic Aids

The scan tool Serial Data Link (SDL) monitor used in this diagnostic is within the body portion of the scan tool. This requires exiting from the chassis portion of the scan tool to the main menu and entering into the body portion of the scan tool menu and selecting SDL MONITOR.

With the SDL monitor (ABS to IPC mode), any message that is being transmitted on the serial data link can be observed. Refer to Instrument Cluster for further serial data link information.

Use the Lamp Test function of the Scan Tool in order to turn the indicator on while looking for an intermittent malfunction in the ABS warning indicator circuitry.

Thoroughly inspect any circuitry that may cause the intermittent complaint for the following conditions:

•	Backed out terminals

•	Improper mating

•	Broken locks

•	Improperly formed or damaged terminals

•	Poor terminal-to-wiring connections

•	Physical damage to the wiring harness

Step

Action

Value(s)

Yes

Important: Zero the J 39200 test leads before making any resistance measurements. Refer to the J 39200 user's manual.

Was the ABS Diagnostic System Check performed?

Go to Step 2

Go to Diagnostic System Check - ABS

Turn the ignition switch to the OFF position.
Install a Scan Tool .
Turn the ignition switch to the RUN position.

Do not start the engine.

Select Special Functions on the Scan Tool .
Select Lamp Test on the Scan Tool .
Use the Scan Tool in order to turn the amber ABS warning indicator off.

Did the amber ABS warning indicator turn off?

Go to Step 3

Go to Step 4

Select Special Functions on the Scan Tool .
Select Lamp Test on the Scan Tool .
Use the Scan Tool in order to flash the amber ABS warning indicator.

Did the amber ABS warning indicator flash?

Go to Step 7

Go to Step 4

Inspect all of the connectors and the terminals for the following conditions:

•	Poor terminal contact

•	Evidence of corrosion

Is there evidence of poor terminal contact or corrosion?

Go to Step 5

Go to Step 6

Replace all of the terminals that exhibit signs of poor terminal contact or corrosion.

Is the repair complete?

Go to Diagnostic System Check - ABS

Repair the instrument panel cluster.

Refer to Diagnostic System Check - Instrument Cluster in Instrument Panel, Gauges and Console.

Is the repair complete?

Go to Diagnostic System Check - ABS

The malfunction is not present at this time.

Refer to Diagnostic Aids for more information.

Is the action complete?

System OK