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Home >> Toyota >> 2020 >> RAV4 XLE, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 181 (Smart Key System (For Start, HV) - Diagnostic Codes (1 Of 2)) >> SMART KEY SYSTEM (for Start Function, HV Model) >> DTC B279A-12: Engine Immobiliser System Circuit Short to Battery [11/2018 - ] >> Description

DTC B279A-12: Engine Immobiliser System Circuit Short to Battery [11/2018 - ]: Description

WARNING: This page is about a different variant/trim than selected.

If the communication line (IMI - EFIO) between the hybrid vehicle control ECU assembly and ID code box (immobiliser code ECU) is stuck high, the hybrid vehicle control ECU assembly will store this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
B279A-12 Engine Immobiliser System Circuit Short to Battery The communication line (IMI - EFIO) between the hybrid vehicle control ECU assembly and ID code box (immobiliser code ECU) is stuck high (1 trip detection logic*).
  • Harness or connector
  • ID code box (immobiliser code ECU)
  • Hybrid vehicle control ECU assembly
DTC output confirmation operation:
  1. Turn the power switch on (IG) and wait 6 seconds.
  1. *: Only output while a malfunction is present.
VEHICLE CONDITION AND FAIL-SAFE OPERATION WHEN MALFUNCTION DETECTED

Vehicle Condition when Malfunction Detected Fail-safe Operation when Malfunction Detected
Hybrid control system cannot be started Hybrid control system cannot be started
RELATED DATA LIST AND ACTIVE TEST

DTC No. Data List and Active Test
B279A-12 -