P1682

Test 1:

Test 2 - 5:

Test 6 - 7:

SYMPTOM
P1682-CHARGING SYSTEM VOLTAGE TOO LOW

WHEN MONITORED
With the ignition on. Engine RPM greater than 1152 RPM. With no other charging system codes set.

SET CONDITION
The battery sensed voltage is 1 volt below the charging goal for 13.47 seconds. The PCM senses the battery voltage turns off the field driver and senses the battery voltage again. If the voltages are the same, the code is set.

POSSIBLE CAUSES
- Charging voltage below 15.1 volts
- B+ circuit high resistance
- Generator ground high resistance
- Target voltage differs from battery voltage
- (K20) generator field driver circuit open
- (A142) ASD relay output circuit
- Generator