Lexus IS250 IS220d GSE20 ALE20 - ENGINE IMMOBILISER

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT FUSE (SECURITY)

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BATTERY)

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BODY GROUND)

ENGINE IMMOBILISER SYSTEM (for 2AD-FHV) - Certification ECU Power Source Circuit

DESCRIPTION

This circuit provides power to operate the certification ECU.


WIRING DIAGRAM

Engine Immobiliser System (For 2Ad-Fhv) - Certification Ecu Power Source Circuit. ENGINE IMMOBILISER. Lexus IS250 IS220d GSE20 ALE20

INSPECTION PROCEDURE

1.INSPECT FUSE (SECURITY)

Remove the SECURITY fuse from the cowl side junction block RH.

Measure the resistance of the fuse.

  • Standard resistance:
  • Below 1 Ω
NG
REPLACE FUSE
OK
2.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BATTERY)
Engine Immobiliser System (For 2Ad-Fhv) - Certification Ecu Power Source Circuit. ENGINE IMMOBILISER. Lexus IS250 IS220d GSE20 ALE20

Disconnect the P33 ECU connector.

Measure the voltage according to the value(s) in the table below.

  • Standard voltage:
  • Tester ConnectionConditionSpecified Condition
    P33-1 (+B1) - Body groundAlways10 to 14 V
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
3.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BODY GROUND)
Engine Immobiliser System (For 2Ad-Fhv) - Certification Ecu Power Source Circuit. ENGINE IMMOBILISER. Lexus IS250 IS220d GSE20 ALE20

Measure the resistance according to the value(s) in the table below.

  • Standard resistance:
  • Tester ConnectionConditionSpecified Condition
    P33-17 (E) - Body groundAlwaysBelow 1 Ω
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
LEXUS IS250, IS220d / GSE20 ALE20
ENGINE IMMOBILISER
Lexus IS250 IS220d GSE20 ALE20
ENGINE IMMOBILISER SYSTEM for 2AD-FHV