DTC 21 [IMMOBILIZER SYSTEM]

id0902e4904600

WE-C, WL-3, WL-C

DTC 21

Code word/ID number stored in immobilizer unit EEPROM cannot be read.

POSSIBLE CAUSE

• Defective immobilizer unit

DTC 21	Code word/ID number stored in immobilizer unit EEPROM cannot be read.
POSSIBLE CAUSE	• Defective immobilizer unit

Diagnostic procedure

STEP	INSPECTION		ACTION
—	INSPECT IMMOBILIZER UNIT • Turn engine 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 SYSTEM REPROGRAM PROCEDURE [WL-3, WL-C, WE-C].)
—		No	Immobilizer system is okay.

WLT-2

DTC 21

Code word/ID number memorized in immobilizer unit EEPROM cannot be read.

POSSIBLE CAUSE

• Defective immobilizer unit

DTC 21	Code word/ID number memorized in immobilizer unit EEPROM cannot be read.
POSSIBLE CAUSE	• Defective immobilizer unit

Diagnostic procedure

STEP	INSPECTION		ACTION
—	INSPECT IMMOBILIZER UNIT • Turn engine switch from LOCK position to ON position. • Does security light indicate DTC 21 again?	Yes	Replace immobilizer unit and reprogram immobilizer system. (See IMMOBILIZER SYSTEM REPROGRAM PROCEDURE [WLT-2].)
—		No	Immobilizer system is okay.