Circuit Description
The EBCM/EBTCM monitors the following occurrences in order to calculate the brake rotor temperatures:
| • | The vehicle speed deceleration |
| • | The ABS/TCS activation |
| • | The brake lamp ON times |
Conditions for Setting the DTC
This DTC sets when either driven wheel estimated brake rotor temperature exceeds 375°C (700°F). If either driven wheel estimated brake rotor temperature has exceeded 375°C (700°F) during ABS or normal braking conditions, the code will not be set until the next TCS activation occurs.
If both rotor estimated temperatures have cooled below 275°C (530°F) before the next TCS activation, the following conditions will be present:
| • | The code will not be set. |
| • | The TCS will not be disabled. |
If either driven wheel brake rotor temperatures has exceeded 375°C (700°F) during TCS, then the code will be set immediately. The TCS will not be disabled until the end of the TCS event.
Action Taken When the DTC Sets
| • | A malfunction DTC is stored. |
| • | The TCS is disabled. |
| • | The TRACTION CONTROL indicator is turned ON. |
| • | The ABS remains functional. |
Conditions for Clearing the DTC
| • | The condition for the DTC is no longer present and you used the scan tool Clear DTC function. |
| • | The EBCM/EBTCM does not detect the DTC in 50 drive cycles. |
Diagnostic Aids
| • | The temperatures are estimated figures taken by the EBCM/EBTCM. |
| • | The following conditions are other possible causes of this malfunction: |
| - | Excessive brake usage |
| - | Excessive TCS usage |
| - | A misadjusted or damaged stoplamp/BTSI switch |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the ABS Diagnostic System Check performed? | -- | Go to Step 2 | |
2 |
Are there any other DTCs? | -- | Go to Step 3 | |
Is the BTM exceeded? | -- | Go to Step 4 | Go to Step 5 | |
4 | Replace the EBCM/EBTCM. Refer to Electronic Brake Control Module Replacement . Is the repair complete? | -- | -- | |
5 | Inspect the stoplamp switch for misadjustment. Is the switch misadjusted? | -- | Go to Stop Lamp Switch Replacement in Hydraulic Brakes |
