Entry And Start System Room Oscillator Circuit

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - ELECTRICAL KEY OSCILLATOR)

CHECK AND REPLACE ELECTRICAL KEY OSCILLATOR

PERFORM ACTIVE TEST BY INTELLIGENT TESTER (CERTIFICATION ECU OUTPUT SIGNAL)

ENTRY AND START SYSTEM - Room Oscillator Circuit


DESCRIPTION

The certification ECU activates the front and rear cabin oscillators. The power is supplied from the certification ECU to both the front and rear cabin oscillators. The front and rear cabin oscillator circuits have the same wiring. If the smart access system with push-button start does not operate properly inside the vehicle, check the circuit for their oscillators.

WIRING DIAGRAM


Lexus Is250, Is220D. Gse20 Ale20.Door Lock.Power Door Lock Control System.Entry And Start System Room Oscillator Circuit


INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - ELECTRICAL KEY OSCILLATOR)


    Lexus Is250, Is220D. Gse20 Ale20.Door Lock.Power Door Lock Control System.Entry And Start System Room Oscillator Circuit

  1. Disconnect the P33 ECU connector.

  1. Disconnect the oscillator connectors.

Standard resistance:
Tester Connection (Symbols)
Condition
Specified Condition
P33-12 (CG5B) - P15-3 (CLGB)
Always
Below 1 Ω
P33-11 (CLG5) - P15-1 (CLG3)
Always
Below 1 Ω
P33-14 (CG6B) - Q30-3 (CLGB)
Always
Below 1 Ω
P33-13 (CLG6) - Q30-1 (CLG4)
Always
Below 1 Ω
P33-12 (CG5B) - Body ground
Always
10 kΩ or higher
P33-11 (CLG5) - Body ground
Always
10 kΩ or higher
P33-14 (CG6B) - Body ground
Always
10 kΩ or higher
P33-13 (CLG6) - Body ground
Always
10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.CHECK AND REPLACE ELECTRICAL KEY OSCILLATOR

  1. Replace the electrical key oscillator.

  1. Check that the entry LOCK / UNLOCK function operates normally.

    OK:
    Entry LOCK / UNLOCK function operates normally.


OK
END (ELECTRICAL KEY OSCILLATOR IS DEFECTIVE)
NG


3.PERFORM ACTIVE TEST BY INTELLIGENT TESTER (CERTIFICATION ECU OUTPUT SIGNAL)


    Lexus Is250, Is220D. Gse20 Ale20.Door Lock.Power Door Lock Control System.Entry And Start System Room Oscillator Circuit

  1. Reconnect the oscillator and the ECU connectors.

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

  1. Following the display on the tester, select the "ACTIVE TEST".

    SMART KEY (Certification ECU):
    Item
    		Vehicle Condition/Test Details
    Fr Transmitter
    		Electrical key Oscillator (console) ON/OFF
    Rr Transmitter
    		Electrical key Oscillator (rear seat) ON/OFF

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

    Standard:
    Tester Connection (Symbols)
    		Condition
    		Specified Condition
    P33-12 (CG5B) - P33-11 (CLG5)
    		During ACTIVE TEST
    		Frequency is generated (higher than 0 Hz)
    P33-14 (CG6B) - P33-13 (CLG6)
    		During ACTIVE TEST
    		Frequency is generated (higher than 0 Hz)


NG
REPLACE CERTIFICATION ECU
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE