PCM monitors the voltage of the 5V reference power supply every 1.87 seconds, under conditions for setting DTC. If the PCM detects the value within these conditions lasts for more than 0.2 seconds, the PCM sets a P0641 DTC.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
Sensor reference voltage check | 1. Short in sensor power supply line 2. Faulty PCM |
Enable Conditions |
•
IG "ON" | |
Threshold value |
•
Sensor supply power less than 4.5V or greater than 5.5V | |
Diagnosis Time |
•
Continuous (More than 0.2 seconds failure for every 1.87 seconds test ) | |
MIL On Condition |
•
3 driving cycle |
