P1682

Tests 1 - 2:

Tests 3 - 7:

Tests 8 - 11:

SYMPTOM
P1682 - CHARGING SYSTEM VOLTAGE TOO LOW

WHEN MONITORED
With the ignition key ON and the engine running over 1152 rpm. With no other charging system codes set.

SET CONDITION
The battery sensed voltage is 1 volt below the charging 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
- B(+) circuit high resistance
- Generator ground high resistance
- ASD relay output circuit open
- ASD relay output circuit shorted to ground
- Generator field driver circuit open
- Generator field driver circuit shorted to ground
- PCM
- PCM defective (charging system voltage low)