If the 4WD ECU detects that there is an over-voltage in the Motor Pump circuit, it sets P1821 and lets a warning lamp turn on.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
Monitoring voltage in the motor pump circuit | 1. Poor connection 2. Short to battery in the circuit 3. Internal error in the coupling |
Enable conditions |
•
IG " ON " | |
Threshold value |
•
The voltage in the motor driving circuit > Approx. 9V | |
Detecting time |
•
0.3 second | |
Fail Safe |
•
Prohibition for 4WD control |
