P1682

Test 1:

Tests 2 - 4:

Tests 5 - 8:

Tests 9 - 10:

SYMPTOM
P1682-CHARGING SYSTEM VOLTAGE TOO LOW

WHEN MONITORED
With the ignition key ON and the engine running over 1500 RPM after 25 seconds.

SET CONDITION
When the PCM regulates the generator field and there are no detected field problems, but the voltage output does not increase.

POSSIBLE CAUSES
- Ambient/Batt temperature sensor
- Intermittent condition
- B (+) circuit high resistance
- Generator ground high resistance
- Generator field source (+) circuit open
- Generator field source circuit shorted to ground
- Generator field driver circuit open
- Generator field coil high resistance
- PCM, Driver circuit