Diagnostic procedure

DTC 21 - DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
-	INSPECT IMMOBILIZER UNIT Turn ignition switch from LOCK position to START position for 2 seconds Does security light indicate DTC 21 again?	Yes	Replace immobilizer unit and reprogram immobilizer system. (See IMMOBILIZER UNIT REPLACEMENT [for California Emission Regulation Applicable Models].) (See IMMOBILIZER UNIT REPLACEMENT [for Federal Emission Regulation Applicable Models].)
-		No	Immobilizer system is okay.