Dtc B1216 Rear Door Ecu Rh 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 RH (REAR DOOR RH ECU) - BATTERY AND BODY GROUND)

CHECK RESISTANCE OF COMMUNICATION LINE

DTC B1216 Rear Door ECU RH Communication Stop


DESCRIPTION

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

DTC No.
DTC Detection Condition
Trouble Area
B1216
Rear door RH ECU communication stops
  1. Multiplex network door ECU rear RH (rear door RH ECU)
  1. Wire harness

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.Multiplex Communication.Multiplex Communication System. Dtc B1216 Rear Door Ecu Rh Communication Stop


INSPECTION PROCEDURE

1.CHECK OPERATION

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

    OK:
    Door warning light illuminates.


NG
Go to step 2
OK

REPLACE MULTIPLEX NETWORK DOOR ECU REAR RH

2.CHECK WIRE HARNESS (MULTIPLEX NETWORK DOOR ECU REAR RH (REAR DOOR RH ECU) - BATTERY AND BODY GROUND)
Lexus Gs430, Gs300. Uzs190 Grs190.Multiplex Communication.Multiplex Communication System. Dtc B1216 Rear Door Ecu Rh Communication Stop

  1. Disconnect the P3 ECU connector.

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

    Standard voltage:
    Tester Connection
    		Specified Condition
    P3-4 (CPUB) - Body ground
    		10 to 14 V
    Standard resistance:
    Tester Connection
    		Specified Condition
    P3-1 (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 B1216 Rear Door Ecu Rh Communication Stop

  1. Disconnect the P3, Q2 and N4 ECU connectors.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    P3-8 (MPX1) - Q2-9 (MPX2)
    		Below 1 Ω
    P3-9 (MPX2) - N4-9 (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 RH AND HARNESS AND CONNECTOR

C
REPAIR OR REPLACE HARNESS AND CONNECTOR
A

REPLACE MULTIPLEX NETWORK DOOR ECU REAR RH