P1682

Test 1:

Tests 2 - 6:

Tests 7 - 11:

Tests 12 - 15:

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
- Generator field terminals voltage below 3.0 Volts
- Defects in generator drive belt or adjustment
- B (+) circuit high resistance
- Generator ground high resistance
- Generator field driver circuit open
- Generator field driver circuit shorted to ground
- Generator field source circuit open
- Generator field source circuit shorted to ground
- Ambient/Battery temperature sensor
- PCM
- Powertrain control module defective (temperture not within 10 °F)