OK:
Waveform is output normally (see illustration)
Text in Illustration
NG -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) See: Accessories and Optional
Equipment/Antitheft and Alarm Systems/Alarm Module/Service and Repair/Removal
OK -- REPLACE ENGINE SWITCH See: Powertrain Management/Ignition System/Sensors and Switches - Ignition
System/Ignition Switch/Service and Repair/Removal
From 08/2009
THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM: B278A: Short to GND in Immobiliser System Power
Source Circuit
B278A - Short to GND in Immobiliser System Power Source Circuit
DESCRIPTION
This DTC is stored when the engine switch power source supply line is open or shorted.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
If the certification ECU (smart key ECU assembly) is replaced, register the key See: Accessories and Optional
Equipment/Antitheft and Alarm Systems/Testing and Inspection/Programming and Relearning/Engine Immobilizer System.
PROCEDURE
1. CHECK DTC OUTPUT
(a) Clear the DTCs See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Testing and Inspection/Reading and
Clearing Diagnostic Trouble Codes/Engine Immobiliser System.
(b) Recheck for DTCs See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Testing and Inspection/Reading and
Clearing Diagnostic Trouble Codes/Engine Immobiliser System.
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