TCS

C2227

Component Location:

General Description
BTCS (Brake Traction Control System) is operated when the value (Wheel acceleration value + speed difference value) exceeds the specified value when vehicle speed is lower than the 50 km/h. The BTCS installed HECU calculates the DISC temperature logically, which is an assumed value, by using the value of Wheel speed, vehicle speed change, CONTROL MODE and BLS SIGNAL. Assumed DISC Temperature is used to protect DISC overheating, caused by long-time operation, which may cause a decrease in brake efficiency.

DTC Description
If the HECU decides that the Disc is over-heated (above 500 °C), then it turns the TCS lamp ON and inhibits BTCS operation to protect overheating of the disc. If the calculated temperature becomes lower than specified value (approx. 250 °C), then the HECU turns the TCS lamp OFF and operates the BTCS again.If the HECU decides that the Disc is over-heated (above 500 °C), then it turns the TCS lamp ON and inhibits BTCS operation to protect overheating of the disc. If the calculated temperature becomes lower than specified value (approx. 250 °C), then the HECU turns the TCS lamp OFF and operates the BTCS again.

DTC Detecting Condition:

Component Inspection
1. Wait until the brake discs cool down sufficiently.
2. Ignition "OFF".
3. Ignition "ON".
4. Connect scantool and select "Diagnostic Trouble Codes (DTCs)" mode
5. Using a scantool, Clear DTC.
6. Select "Diagnostic Trouble Codes (DTCs)" mode again.
7. Are any DTCs present?

YES
a. Substitute with a known-good HECU and check for proper operation. If problem is corrected, replace HECU and then go to "Verification of Vehicle Repair" procedure.

NO
a. Fault is caused by Faulty HECU or was repaired and HECU memory was not cleared.
b. The DTC code can be set by excessive TCS control in normal system status. Go to "Verification of Vehicle Repair" procedure.

Verification of Vehicle Repair
After a repair, it is essential to verify that the fault has been corrected.
1. Connect scan tool and select "Diagnostic Trouble Codes (DTCs)" mode
2. Using a Scantool, Clear DTC.
3. Operate the vehicle within DTC Detecting Condition in General Information.
4. Are any DTCs present?

YES
a. Go to the applicable troubleshooting procedure.

NO
a. System performing to specification at this time.