Lexus IS250 IS220d GSE20 ALE20 - DOOR LOCK

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

ENTRY AND START SYSTEM - Certification ECU Power Source Circuit

DESCRIPTION

This is the power source circuit of the certification ECU.


The certification ECU controls the following:


Electrical key verification confirmation
Cabin and door oscillator control
Entry door LOCK / UNLOCK request to the main body ECU RH
Steering LOCK / UNLOCK request
Immobilizer SET / UNSET request to the ID code box

WIRING DIAGRAM

Entry And Start System - Certification Ecu Power Source Circuit. DOOR LOCK. Lexus IS250 IS220d GSE20 ALE20

INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
Entry And Start System - Certification Ecu Power Source Circuit. DOOR LOCK. Lexus IS250 IS220d GSE20 ALE20

Disconnect the P33 certification ECU connector.

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

  • Standard voltage:
  • Tester Connection (Symbols)ConditionSpecified Condition
    P33-1 (+B1) - Body groundAlways10 to 14 V
    P33-18 (IG) - Body groundEngine switch OFFBelow 1 V
    Engine switch ON (IG)10 to 14 V
    P33-19 (ACC) - Body groundEngine switch OFFBelow 1 V
    Engine switch ON (ACC)10 to 14 V

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

  • Standard resistance:
  • Tester Connection (Symbols)ConditionSpecified 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
DOOR LOCK
Lexus IS250 IS220d GSE20 ALE20
ENTRY AND START SYSTEM