Dtc B1217 Rear Door Ecu Lh Communication Stop

Communication System. Lexus Gs430, Gs300. Uzs190 Grs190
Multiplex Communication. Lexus Gs430, Gs300. Uzs190 Grs190

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK OPERATION

CHECK WIRE HARNESS (MULTIPLEX NETWORK DOOR ECU REAR LH (REAR DOOR LH ECU) - BATTERY AND BODY GROUND)

CHECK RESISTANCE OF COMMUNICATION LINE

DTC B1217 Rear Door ECU LH Communication Stop


DESCRIPTION

  1. This DTC is detected when communication between the multiplex network door ECU rear LH (rear door LH ECU) and gateway ECU stops for more than 10 seconds.

DTC No.
DTC Detection Condition
Trouble Area
B1217
Rear door LH ECU communication stops
  1. Multiplex network door ECU rear LH (rear door LH ECU)
  1. Wire harness

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.Multiplex Communication.Multiplex Communication System. Dtc B1217 Rear Door Ecu Lh Communication Stop


INSPECTION PROCEDURE

1.CHECK OPERATION

  1. Open the rear door LH and check that the door warning light (built into combination meter) illuminates.

    OK:
    Door warning light illuminates.


NG
Go to step 2
OK

REPLACE MULTIPLEX NETWORK DOOR ECU REAR LH (REAR DOOR LH ECU)

2.CHECK WIRE HARNESS (MULTIPLEX NETWORK DOOR ECU REAR LH (REAR DOOR LH ECU) - BATTERY AND BODY GROUND)
Lexus Gs430, Gs300. Uzs190 Grs190.Multiplex Communication.Multiplex Communication System. Dtc B1217 Rear Door Ecu Lh Communication Stop

  1. Disconnect the Q2 ECU connector.

  1. Measure the resistance and voltage of the wire harness side connector.

    Standard voltage:
    Tester Connection
    		Specified Condition
    Q2-4 (CPUB) - Body ground
    		10 to 14 V
    Standard resistance:
    Tester Connection
    		Specified Condition
    Q2-1 (GND) - Body ground
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


3.CHECK RESISTANCE OF COMMUNICATION LINE

Lexus Gs430, Gs300. Uzs190 Grs190.Multiplex Communication.Multiplex Communication System. Dtc B1217 Rear Door Ecu Lh Communication Stop

  1. Disconnect the Q2, O3, U1 and P3 ECU connectors.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    Q2-8 (MPX1) - O3-9 (MPX2)
    		Below 1 Ω
    Q2-7 (MPX3) - U1-4 (MPX1)
    		Below 1 Ω
    Q2-9 (MPX2) - P3-9 (MPX2)
    		Below 1 Ω
    Result:
    Result
    		Proceed to
    Both are OK
    		A
    One is OK
    		B
    Both are NG
    		C


B
REPLACE MULTIPLEX NETWORK DOOR ECU REAR LH AND WIRE HARNESS CONNECTOR

C
REPAIR OR REPLACE HARNESS AND CONNECTOR
A

REPLACE MULTIPLEX NETWORK DOOR ECU REAR LH (REAR DOOR LH ECU)