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2014 TOYOTA 4RUNNER
4.0L V6•4WD•AUTOMATIC•gas•1GR-FE
7 active safety recalls on this vehicle — view recalls
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Repairs0Labor500Torque3440Fluid10DTC1926Battery1Maintenance0Recalls7
P0622moderate severityPowertrain

Generator Field "F" Control Circuit

on 2014 Toyota 4Runner 4.0L V6 · 4WD

What this code means

The PCM detected a fault in the generator field (F terminal) control circuit. This affects the alternator's ability to regulate output.

Symptoms

  • Under- or over-charging
  • Battery warning light
  • Electrical system instability

Common causes

  • Faulty field control circuit
  • Alternator internal fault
  • Wiring open or short
  • Faulty PCM driver

Diagnostic steps

  1. Test field control circuit voltage
  2. Inspect wiring and connectors
  3. Check alternator output under load
  4. Replace alternator or repair wiring
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