B278A

DTC B278A Short to GND in Immobilizer System Power Source Circuit

DESCRIPTION

DTC Detection Condition:

- Operating the engine switch starts the engine or changes the power source status (ACC / IG / OFF / START).
- The engine switch is a momentary type switch which turns on only while the switch is held down. The certification ECU always stores the power source status (OFF / ACC / ON). If the battery has been removed and reinstalled, the power source status maintained before removal is restored.
- The transponder amplifier is built into the engine switch.

Wiring Diagram:

INSPECTION PROCEDURE

Step 1-2: