DTC C1213 ABS ACTIVE Indicator Circuit Malfunction. Chevrolet Monte Carlo 1999

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 1999 🢒 Monte Carlo 🢒 DTC 🢒 DTC C1213 ABS ACTIVE Indicator Circuit Malfunction

ABS Components
Antilock Brake System Schematics

Circuit Description

DTC C1213 tests the state of the ABS (LOW TRAC) active indicator. DTC C1213 identifies a situation in which the driver could not be warned of a low traction event by the ABS warning indicator or the ABS warning indicator is always on. The EBCM provides a ground through CKT 1656 in order to turn the ABS warning indicator on. If the control line CKT 1656 is open or shorted to voltage the ABS indicator will always remain off. If the control line CKT 1656 is shorted to ground the ABS active indicator remains on when the ignition is in the ON position.

Conditions for Setting the DTC

DTC C1213 sets only during one of the following conditions:

•	The three second bulb check

•	The indicator turns on.

A malfunction exists if the EBCM cannot control the ABS active (LOW TRAC) indicator for two seconds.

Action Taken When the DTC Sets

•	A malfunction DTC stores.

•	The ABS does not disable.

Conditions for Clearing the DTC

•	The condition responsible for setting the DTC no longer exists and the Scan Tool Clear DTC function is used.

•	100 drive cycles pass with no DTC detected.

Diagnostic Aids

The following conditions may cause an intermittent malfunction:

•	A poor connection

•	Rubbed-through wire insulation

•	A broken wire inside the insulation

Use the Scan Tool Lamp Test function in order to command the indicator on while looking for an intermittent malfunction in the ABS active (LOW TRAC) indicator circuitry.

Use the enhanced diagnostic function of the Scan Tool in order to measure the frequency of the malfunction. Refer to the Scan Tool manual or Scan Tool Diagnostics located in this section for the procedure.

Thoroughly inspect any circuitry that may be causing 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

Zero the J 39200 test leads before making any resistance measurements.

Step

Action

Value(s)

Yes

Was the 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 ON 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 attempt to turn the amber ABS warning indicator on and then off.

Can the ABS active indicator (LOW TRAC) be turned on and off?

Go to Step 21

Go to Step 3

Turn the ignition switch to the OFF position.
Remove the scan tool.
Turn the ignition switch to the ON position.

Do not start the engine.

Does the ABS active indicator turn on and stay on?

Go to Step 4

Go to Step 7

Turn the ignition switch to the OFF position.
Disconnect the 24-way EBCM connector C1.
Turn the ignition switch to the ON position.

Do not start the engine.

Does the ABS active indicator turn on?

Go to Step 16

Go to Step 5

Turn the ignition switch to the OFF position.
Inspect the 24-way EBCM connector C1 terminal A6 and then the remaining terminals for signs of the following conditions:

•

Damage

•	Poor terminal contact

•	Terminal corrosion

Are there signs of poor terminal contact, corrosion, or a damaged terminal?

Go to Step 17

Go to Step 6

Reconnect the 24-way EBCM harness connector C1.
Install a scan tool.
Turn the ignition switch to the ON position.

Do not start the engine.

Use the scan tool in order to read the DTCs.

Does DTC C1213 reset?

Go to Step 20

Go to Diagnostic System Check - ABS

Turn the ignition switch to the OFF position.
Turn the ignition switch to the ON position.

Do not start the engine.

Observe the ABS indicators.

Do the ABS indicators turn on and then off?

Go to Step 8

Go to Step 11

Turn the ignition switch to the OFF position.
Disconnect the 24-way EBCM connector C1.
Connect a fused jumper wire (such as a J 36169-A ) with a 3A Fuse between the EBCM harness connector C1 terminal A6 and ground.
Turn the ignition switch to the ON position.

Do not start the engine.

Does the ABS active indicator turn on?

Go to Step 5

Go to Step 9

Turn the ignition switch to the OFF position.
Remove the jumper wire.
Disconnect the Instrument Panel Cluster harness connector C1.
Use the J 39200 in order to measure the resistance between the 24-way EBCM harness connector C1 terminal A6 and the Instrument Panel Cluster harness connector C1 terminal C8.

Is the resistance within the specified range?

0-2 ohms

Go to Step 10

Go to Step 18

Turn the ignition switch to the ON position, engine off.
Use the J 39200 in order to measure the voltage between the 24-way EBCM harness connector C1 terminal A6 and ground.

Is the voltage within the specified range?

0-2 V

Go to Instrument Cluster System Check in Engine Electrical

Go to Step 19