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2003 TOYOTA TACOMA
2.7L I4•RWD•AUTOMATIC•gas•3RZ-FE
5 active safety recalls on this vehicle — view recalls
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Repairs0Labor1047Torque1633Fluid17DTC3480Battery2Maintenance0Recalls5
P1600moderate severityPowertrain

ECM Battery Backup Circuit

on 2003 Toyota Tacoma 2.7L I4 · RWD

What this code means

The ECM detected a loss of battery voltage at the BATT terminal.

Symptoms

  • CEL
  • Lost fuel trim values
  • Intermittent stalling
  • Difficulty starting

Common causes

  • Corroded battery terminals
  • Damaged EFI fuse
  • Open BATT wiring
  • Weak battery

Diagnostic steps

  1. Check battery terminals
  2. Test EFI fuse
  3. Inspect BATT wiring
  4. Check battery voltage

Repair notes

Clean terminals or replace fuse.

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