DTC    B1216    Rear Door ECU RH Communication Stop

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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


B111301E01


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)
B109184E06

  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

E109401E02

  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