For 1990-2009 cars
ABS Components
Cell 44: ABS/TCS Switch, Isolation Valve Solenoids, and PCM
Handling ESD Sensitive Parts Notice
Cell 50: UART Serial Data Line
Cell 14: G102, G104, G106, G110 and G301

### Circuit Description

If the EBTCM detects excessive use of the Antilock Brake System or Traction Control System, the EBTCM will disable the Traction Control in order to prevent a possible brake over temperature condition.

Excessive braking and/or Traction Control may result in the following conditions:

• | Degraded braking performance

• | Damage to the rotors

• | Damage to the brake pads

### Conditions for Setting the DTC

The temperature values are an estimated figure calculated by the EBTCM. If the temperature value exceeds the Brake Thermal Model limit, the DTC is set.

### Action Taken When the DTC Sets

The following actions are taken when the DTC sets:

• | A malfunction DTC is stored.

• | The EBTCM illuminates the TRACTION OFF indicator.

• | The TCS is disabled for as long as both of the driven brake wheel calculated rotor temperatures are above the estimated figure.

| If the calculated rotor temperatures go below the estimated figure, then the TRACTION OFF indicator will turn OFF.

### Diagnostic Aids

The following conditions may cause the brake thermal model to exceed the limit:

• | Repeated, heavy use of the Antilock Brake or Traction Control systems

• | An intermittent wheel speed sensor signal

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 RUN position.
2. Use a scan tool to read the DTCs.

Are there any other DTCs?

--

Go to Diagnostic Trouble Code (DTC) List for the appropriate DTC

Go to Step 3

3 |

1. Let the vehicle cool for at least 30 minutes after the last time it was driven.
2. Use a scan tool in order to enter the ABS DATA LIST.
3. Use the scan tool in order to read the TSC STATUS.

Is the Brake Thermal Model (BTM) exceeded?

--

Go to Step 4

Go to Step 5

4 | Replace the EBTCM. Refer to Electronic Brake and Traction Control Module Replacement . Is the replacement complete? | -- | Go to Diagnostic System Check | --
5 | Check the brake switch for misadjustment. Is the brake switch misadjusted? | -- | Go to Brake Release Switch Adjustment in Cruise Control | Go to Diagnostic System Check