Scan Tool Displays Undefined DTC. Chevrolet Monte Carlo 1998

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 1998 🢒 Monte Carlo 🢒 Brakes 🢒 Antilock Brake System 🢒 Scan Tool Displays Undefined DTC

This symptom table identifies undefined DTCs which result from an internal malfunction in the EBCM.

The following conditions may cause an intermittent malfunction:

•	A poor connection

•	Rubbed-through wire insulation

•	A broken wire inside the insulation

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

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

Step	Action	Value(s)	Yes	No
1	Was the Diagnostic System Check performed?	--	Go to Step 2	Go to Diagnostic System Check
2	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. Use the scan tool to clear DTCs? Turn the ignition switch to the OFF position. Turn the ignition switch to the RUN position. Does the undefined DTC OR DTCs reset?	--	Go to Step 3	Go to Step 4
3	Replace the EBCM. Refer to Electronic Brake Control Module Replacement . Is the repair complete?	--	Go to Diagnostic System Check	--
4	Malfunction not present at this time. Is the action complete?	--	Go to Diagnostic Aids	--