P1614 – Immobilizer No Communication (Toyota)

Description

The ECM detected no communication with the immobilizer system, preventing proper key verification.

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Symptoms

  • No start condition
  • Security light on
  • Key not recognized
  • Intermittent start
  • Failsafe mode

Causes

  • Open circuit in wiring
  • Faulty immobilizer ECU
  • Connector corrosion
  • Weak battery
  • ECM communication failure

Diagnosis

  • Check wiring continuity
  • Inspect connectors
  • Measure voltage
  • Test immobilizer ECU
  • Scan for related codes

Repair

  • Repair wiring
  • Clean connectors
  • Replace immobilizer ECU
  • Replace ECM if required

Related Problems

Related Fault Codes