P1682

Tests 28 - 33:

Tests 34 - 38:

SYMPTOM
P-1682 CHARGING SYSTEM VOLTAGE TOO LOW

WHEN MONITORED
With no other charging system codes set. With the ignition on and the engine running above 1500 RPM.

SET CONDITION
The battery sensed voltage is 1 volt below the charging system goal for 25 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
- ASD relay output circuit open
- B (+) ckt high resistance btwn generator & battery
- Driver circuit open
- Generator ground high resistance
- Generator defective
- Battery temperature sensor defective