The charging system includes a battery, generator with a built in regulator, the charging indicator light, and connecting wiring. The generator uses diodes to rectify alternating current (AC) to direct current (DC).
The ECM provides ground to one side of coil of engine main relay and the other side is connected to battery.
The ECM monitors battery voltage and the voltage through engine control relay.
If the signal is above threshold value, the ECM judged this as a fault and DTC is set.
Item | Detecting Condition | Possible Cause |
DTC Strategy | ● Votage check, low | ● Open or short in power(sensing) circuit ● Charging warning Lamp ● Faulty alternator ● Faulty ECM |
Enable Conditions | ● Ignition on | |
Threshold Value | ● Battery voltage > 17.5V | |
Diagnostic Time | ● 5 sec | |
MIL Fuel Limit Fuel Cut EGR Off | ● No ● No ● No ● Yes | |
Fail safe | ● Battery voltage is fixed at about 7.9 V as a basic value |
