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2010 CADILLAC ESCALADE
6.2L V8•4WD•AUTOMATIC•gas
3 active safety recalls on this vehicle — view recalls
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Repairs0Labor987Torque6748Fluid18DTC2446Battery2Maintenance0Recalls3
P1638moderate severityPowertrain

Generator F-Terminal Circuit

on 2010 Cadillac Escalade 6.2L V8 · 4WD

What this code means

The PCM detected a fault on the generator (alternator) F-terminal (field) circuit. The F-terminal circuit controls the generator field current to regulate charging voltage.

Symptoms

  • Battery light on
  • Overcharging or undercharging
  • Battery damage from overcharging
  • Dim lights

Common causes

  • Faulty generator/alternator
  • F-terminal wiring damage
  • PCM control driver failure
  • Corroded connector

Diagnostic steps

  1. Test generator field voltage
  2. Inspect F-terminal wiring
  3. Test generator output regulation
  4. Check PCM field control signal

Repair notes

Test and replace generator if field control is faulty. Inspect wiring.

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