Lexus IS250 · Service Manual BODY

Luggage Compartment Door Opener Circuit

Circuit diagnosis

DESCRIPTION

When the main body ECU RH has received the OFF signal from the luggage compartment opener main switch , the main body ECU RH activates the luggage compartment door lock motor when the ON signal from the luggage compartment door opener inner switch is received.

WIRING DIAGRAM

B124143E02

INSPECTION PROCEDURE


1. CHECK DTC OUTPUT (MULTIPLEX COMMUNICATION SYSTEM)

  1. Delete the DTC.

  1. Check for DTC.

    OK:
    DTC B1200 is not output.



 NG
GO TO MULTIPLEX COMMUNICATION SYSTEM
OK


2. PERFORM ACTIVE TEST BY LUGGAGE COMPARTMENT DOOR LOCK ASSEMBLY

  1. Select the Active Test, use the intelligent tester to generate a control command, and check that the luggage compartment door lock motor operates.

Item
 Test Details
 Diagnostic Note
Trunk/Bdor Open
 Operate luggage compartment door lock motor ON/OFF
 -

OK:
Luggage compartment door lock motor operates.



 OK
Go to step 5
NG


3. INSPECT LUGGAGE COMPARTMENT DOOR LOCK ASSEMBLY

  1. B124145E03
    Remove the luggage compartment door lock assembly.

  1. Move the door lock to the lock position.

  1. Apply battery voltage to the door lock motor and check operation of the door lock motor.

    OK: 
    Measurement Condition
    		 Specified Condition
    Battery positive (+) → Terminal 1
    Battery positive (-) → Terminal 2
    		 Luggage compartment door lock motor unlock



NG
REPLACE LUGGAGE COMPARTMENT DOOR LOCK ASSEMBLY
OK


4. CHECK HARNESS AND CONNECTOR (LUGGAGE COMPARTMENT DOOR LOCK - MAIN BODY ECU RH)

  1. B124149E04
    Disconnect the Q42 lock and J74 ECU connectors.

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

    Standard resistance:
    Tester Connection
    		 Condition
    		 Specified Condition
    Q42-1 - J74-1 (TR+)
    		 Always
    		 Below 1 Ω
    Q42-1 - Body ground
    		 Always
    		 10 kΩ or higher
    Q42-2 - Body ground
    		 Always
    		 Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5. READ VALUE OF INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG) and the turn the intelligent tester main switch on.

  1. Select Trunk/B Door Open SW and Trunk Main SW in the Data List and read the value displayed on the intelligent tester.

    Item
    		 Measurement Item/Display (Range)
    		 Normal Condition
    		 Diagnostic Note
    Trunk/B Door Open SW
    		 Luggage compartment door opener inner switch/ON or OFF
    		 ON: Luggage compartment door opener inner switch is pressed
    OFF: Luggage compartment door opener inner switch is not pressed
    		 -
    Trunk Main SW
    		 Luggage compartment door opener main switch signal/ON or OFF
    		 ON: Luggage compartment door opener main switch is pushed
    ON: Luggage compartment door opener main switch is not pushed
    		 -

    OK:
    ON (luggage compartment door opener inner switch is pressed) appears on the tester.

    OK:
    ON (luggage compartment door opener main switch is pressed) appears on the tester.

    Result 
    Result
    		 Proceed to
    NG (Luggage compartment door opener main switch)
    		 A
    NG (Luggage compartment door opener inner switch)
    		 B
    OK (Luggage compartment door opener main switch and luggage compartment door opener inner switch)
    		 C



B
Go to step 8

C
REPLACE COWL SIDE JUNCTION BLOCK RH (MAIN BODY ECU RH)
A


6. INSPECT LUGGAGE COMPARTMENT DOOR OPENER MAIN SWITCH

  1. B124144E02
    Remove the luggage compartment door opener main switch.

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

    Standard resistance:
    Tester Connection
    		 Condition
    		 Specified Condition
    1 - 2
    		 Switch free (OFF)
    		 10 kΩ or higher
    Switch pushed (ON)
    		 Below 1 Ω



NG
REPLACE LUGGAGE COMPARTMENT DOOR OPENER MAIN SWITCH
OK


7. CHECK HARNESS AND CONNECTOR (LUGGAGE COMPARTMENT DOOR OPENER MAIN SW - MAIN BODY ECU RH)

  1. Install the luggage compartment door opener main switch.

  1. B124150E01
    Disconnect the J57 switch and J75 ECU connectors.

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

    Standard resistance:
    Tester Connection
    		 Condition
    		 Specified Condition
    J57-2 - J75-2 (TSW)
    		 Always
    		 Below 1 Ω
    J57-2 - Body ground
    		 Always
    		 10 kΩ or higher
    J57-1 - Body ground
    		 Always
    		 Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE COWL SIDE JUNCTION BLOCK RH (MAIN BODY ECU RH)

8. INSPECT LUGGAGE COMPARTMENT DOOR OPENER INNER SWITCH

  1. B124147E02
    Remove the luggage compartment door opener inner switch.

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

    Standard resistance:
    Tester Connection
    		 Condition
    		 Specified Condition
    4 - 5
    		 Switch free (OFF)
    		 10 kΩ or higher
    Switch pushed (ON)
    		 Below 1 Ω



NG
REPLACE LUGGAGE COMPARTMENT DOOR OPENER INNER SWITCH
OK


9. CHECK HARNESS AND CONNECTOR (LUGGAGE COMPARTMENT DOOR OPENER INNER SW - MAIN BODY ECU RH)

  1. Install the luggage compartment door opener switch.

  1. B124151E01
    Disconnect the J14 switch and J75 ECU connectors.

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

    Standard resistance:
    Tester Connection
    		 Condition
    		 Specified Condition
    J14-5 - J75-3 (TKUL)
    		 Always
    		 Below 1 Ω
    J14-5 - Body ground
    		 Always
    		 10 kΩ or higher
    J14-4 - Body ground
    		 Always
    		 Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE COWL SIDE JUNCTION BLOCK RH (MAIN BODY ECU RH)


← DATA LIST / ACTIVE TESTPRECAUTION →