Entry And Start System Certification Ecu Power Source Circuit

Body Electrical. Lexus Is250, Is220D. Gse20 Ale20
Door Lock. Lexus Is250, Is220D. Gse20 Ale20

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:
  1. Electrical key verification confirmation
  2. Cabin and door oscillator control
  3. Entry door LOCK / UNLOCK request to the main body ECU RH
  4. Steering LOCK / UNLOCK request
  5. Immobilizer SET / UNSET request to the ID code box

WIRING DIAGRAM


Lexus Is250, Is220D. Gse20 Ale20.Door Lock.Power Door Lock Control System.Entry And Start System Certification Ecu Power Source Circuit


INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)


    Lexus Is250, Is220D. Gse20 Ale20.Door Lock.Power Door Lock Control System.Entry And Start System Certification Ecu Power Source Circuit

  1. Disconnect the P33 certification ECU connector.

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

    Standard voltage:
    Tester Connection (Symbols)
    		Condition
    		Specified Condition
    P33-1 (+B1) - Body ground
    		Always
    		10 to 14 V
    P33-18 (IG) - Body ground
    		Engine switch OFF
    		Below 1 V
    Engine switch ON (IG)
    		10 to 14 V
    P33-19 (ACC) - Body ground
    		Engine switch OFF
    		Below 1 V
    Engine switch ON (ACC)
    		10 to 14 V

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

    Standard resistance:
    Tester Connection (Symbols)
    		Condition
    		Specified Condition
    P33-17 (E) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

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