The PCM measures the voltage from ignition key and from main relay respectively and compares two voltages. This comparison will watch if the Main Relay has switched and remains on after ignition Key-On and if it has switched off after the ignition Key-Off.
The PCM sets DTC P0560 if the voltage after Main Relay is lower than a predetermined threshold after ignition key-on or higher than a predetermined threshold after ignition key-off.
Item | Detecting Condition | Possible Cause | |
DTC Strategy | Case1 |
•
Comparison of battery voltage and voltage after main relay(voltage low) | 1. Poor Connector Connection 2. Open or Short in Circuit |
Case2 |
•
Comparison of battery voltage and voltage after main relay(voltage high) | ||
Case3 |
•
Monitor voltage supply after main relay(open circuit check) | ||
Enable Conditions | Case1 |
•
Ignition Switch "ON"
•
Battery voltage higher than 10V
•
0.05 sec. of delay time after main relay "ON" | |
Case2 |
•
Ignition Switch "OFF"
•
0.05 sec. of delay time after main relay "ON" | ||
Case3 |
•
Voltage after main relay higher than 8.5V
•
Voltage after ignition switch higher than 5V
•
0.05 sec. of delay time after main relay "ON" | ||
Threshold Value | Case1 |
•
Voltage after main realy lower than 6V | |
Case2 |
•
Voltage after main realy lower than 6V | ||
Case3 |
•
Deviation of voltage after main realy and voltage after ignition switch higher than 3.8~8.5V | ||
Diagnostic Time | Case1 |
•
0.2 sec. | |
Case2 |
•
0.2 sec. | ||
Case3 |
•
0.1 sec. | ||
MIL On Condition |
•
- | ||
