Entry And Start System Touch Sensor Circuit

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE OF INTELLIGENT TESTER

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

CHECK AND REPLACE ELECTRICAL KEY OSCILLATOR (CHECK OPERATION OF OSCILLATOR)

INSPECT CERTIFICATION ECU

ENTRY AND START SYSTEM - Touch Sensor Circuit


DESCRIPTION

This circuit receives the signal indicating whether or not a touch sensor signal is detected.

WIRING DIAGRAM


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


INSPECTION PROCEDURE

1.READ VALUE OF INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

  1. Following the display on the tester, select "DATA LIST".

    SMART KEY (Certification ECU):
    Item
    		Measurement Item/Range (Display)
    		Normal Condition
    		Diagnostic Note
    D Touch Sensor
    		Status of touch sensor front LH/ ON or OFF
    		ON: Touch sensor is touched
    OFF: Touch sensor is not touched
    		-
    P Touch Sensor
    		Status of touch sensor front RH/ ON or OFF
    		ON: Touch sensor is touched
    OFF: Touch sensor is not touched
    		-
    OK:
    "ON" (screen is touched) or "OFF" (screen is not touched) appears on the tester screen.


OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
NG


2.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 Touch Sensor Circuit

  1. Disconnect the P33 ECU connector.

  1. Disconnect the oscillator connectors.

Standard resistance:
Tester Connection (Symbols)
Condition
Specified Condition
P33-5 (SEL1) - o2-4 (SEL)
Always
Below 1 Ω
P33-22 (SEN1) - o2-6 (SENS)
Always
Below 1 Ω
P33-6 (SEL2) - n2-4 (SEL)
Always
Below 1 Ω
P33-23 (SEN2) - n2-6 (SENS)
Always
Below 1 Ω
P33-5 (SEL1) - Body ground
Always
10 kΩ or higher
P33-22 (SEN1) - Body ground
Always
10 kΩ or higher
P33-6 (SEL2) - Body ground
Always
10 kΩ or higher
P33-23 (SEN2) - Body ground
Always
10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK AND REPLACE ELECTRICAL KEY OSCILLATOR (CHECK OPERATION OF OSCILLATOR)

  1. Replace the door oscillator.

  1. Check that the entry UNLOCK function operates normally.

    OK:
    Entry UNLOCK function operates normally.


NG
END (ELECTRICAL KEY OSCILLATOR IS DEFECTIVE)
OK


4.INSPECT CERTIFICATION ECU


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

  1. Reconnect the ECU and the oscillator connectors.

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

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

    Standard voltage:
    Tester Connection (Symbols)
    		Condition
    		Specified Condition
    SEL1 (P33-5) - Body ground
    		Move the key more than 5 m (16.4 ft) away from the front door LH
    		10 to 14 V
    SEL1 (P33-5) - Body ground
    		Bring it to the outside handle
    		Below 1 V
    SEL2 (P33-6) - Body ground
    		Move the key more than 5 m (16.4 ft) away from the front door RH
    		10 to 14 V
    SEL2 (P33-6) - Body ground
    		Bring it to the outside handle
    		Below 1 V
    SEN1 (P33-22) - Body ground
    		Front door LH outside handle is not held
    		10 to 14 V
    SEN1 (P33-22) - Body ground
    		Front door LH outside handle is held
    		Below 1 V
    SEN2 (P33-23) - Body ground
    		Front door RH outside handle is not held
    		10 to 14 V
    SEN2 (P33-23) - Body ground
    		Front door RH outside handle is held
    		Below 1 V


NG
REPLACE CERTIFICATION ECU
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE