DTC C2402 Motor - Electrical: DTC Detecting Condition
DTC DETECTION CONDITION AND POSSIBLE CAUSE
| Item |
Detecting Condition |
Possible cause |
| DTC Strategy |
- Battery Voltage Monitoring
|
- Open or short of power supply circuit (ABS2)
- Faulty HECU
|
| Case1 (Motor Relay Open or Motor Short to GND) |
Detect Mode |
- Outside the ABS control cycle
- Inside the ABS control cycle
- Diagnosis mode
|
| Enable Conditions |
- If the motor relay is switched ON and motor voltage < (IGN voltage - 4V ± 0.5V) continued for 49msec, the failure is detected.
|
| Case2 (Motor Lock) |
Detect Mode |
- Outside the ABS control cycle
- Diagnosis mode
|
| Enable Conditions |
- After motor relay is switched OFF, VMR is measured. If the time which V_MR > 1 ± 0.1V is less than evaluation time, recheck is performed again for a maximum of three times. When V_MR is not normal even on the third recheck, the controller recognizes it as failure.
|
| Case3 (Motor Open, Motor Short to BATT) |
Detect Mode |
- Initial Check
- Outside the ABS control cycle
- Diagnosis mode
- Failure mode
|
| Enable Conditions |
- After 1.8sec from the time that motor relay is switched OFF, V_MR > 4 ± 0.5V continued for 1.8sec, the failure is detected.
|
| Case4 (Motor Fuse Open) |
Detect Mode |
- Initial Check
- Outside the ABS control cycle
- Inside the ABS control cycle
- Diagnosis mode
- Failure mode
|
| Enable Conditions |
- If the motor relay is switched OFF and VMRP (Motor power supply voltage) < 4 ± 0.5V continued for 1sec, the failure is detected
|
| Fail Safe |
- The ABS/ESC functions are inhibited.
- The ABS/ESC warning lamps are activated and the EBD warning lamp is not activated.
- Motor failure during the ABS control cycle (Case 1, 4) :Inhibit the ABS/ESC control of front wheels, allow the ABS/ESC control of rear wheels, and ABS/ESC warning lamps are switched on at the end of ABS control.
|