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