DTC C2402 Motor - Electrical: DTC Detecting Condition
DETECTING CONDITION AND POSSIBLE CAUSE REFERENCE
| 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 - 4 ± 0.5 V) continued for 56 msec, the failure is detected.
|
| Case2 (Motor Open, Motor Short to BATT) |
Detect Mode |
- Initial Check
- Outside the ABS control cycle
- Diagnosis mode
- Failure mode
|
| Enable Conditions |
- After 1.8 sec from the time that motor relay is switched OFF, the motor voltage > 4 ± 0.5 V continued for 1.8 sec, the failure is detected.
|
| Case3 (Motor Lock) |
Detect Mode |
- Outside the ABS control cycle
|
| Enable Conditions |
- After motor relay is switched OFF, motor voltage is measured. If the time which motor voltage > 1 ± 0.1 V is less than evaluation time, recheck is performed again for a maximum of three times. When the motor voltage is not normal even on the third recheck, the controller recognizes it as failure.
|
| Case4 (Motor Fuse Open) |
Detect Mode |
- Initial Check
- Outside the ABS control cycle
- Diagnosis mode
- Failure mode
|
| Enable Conditions |
- If the motor relay is switched OFF and motor power supply voltage < 4 ± 0.5 V continued for 1 sec, the failure is detected.
|
| Fail Safe |
- The ABS functions are inhibited.
- The ABS 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 control of front wheels, allow the ABS control of rear wheels, and ABS warning lamps are switched on at the end of ABS control.
|