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1999 TOYOTA TACOMA
2.7L I4•RWD•AUTOMATIC•gas
5 active safety recalls on this vehicle — view recalls
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Repairs0Labor1040Torque1596Fluid17DTC3336Battery2Maintenance0Recalls5
P0696high severityPowertrain

Fan 3 Control Circuit High

on 1999 Toyota Tacoma 2.7L I4 · RWD

What this code means

The PCM detected a high voltage condition in the cooling fan 3 control circuit. Fan 3 may run continuously or not respond, affecting cooling.

Symptoms

  • Third cooling fan runs constantly
  • Engine overheating
  • Check engine light on

Common causes

  • Short to voltage in fan 3 wiring
  • Failed fan 3 relay
  • Corroded fan 3 connector
  • Damaged PCM output driver

Diagnostic steps

  1. Scan and confirm P0696 code
  2. Inspect fan 3 wiring for short to power
  3. Test fan 3 relay operation
  4. Check PCM fan 3 output signal
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