DTC    B1249    Double Locking ECU Communication Stop

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DESCRIPTION

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

DTC No.
DTC Detection Condition
Trouble Area
B1249
Double door lock ECU Communication stops
  1. Double door lock ECU
  2. Wire harness

WIRING DIAGRAM


B110995E02


INSPECTION PROCEDURE

HINT:
When "+B of GND short malfunction of communication bus" DTCs (B1214 and B1215) are detected at the same time as "communication stop" DTC B1249, repair the "+B or GND short malfunction of communication bus" DTCs first.

1.INSPECT FUSE (DOOR No.2)

  1. Remove the DOOR No.2 fuse from the instrument panel junction block.

  1. Measure the resistance of the fuse.

    Standard resistance:
    Below 1 Ω



NG
REPLACE FUSE
OK


2.CHECK WIRE HARNESS (DOUBLE DOOR LOCK ECU - BATTERY AND BODY GROUND)


    B111041E01

  1. Disconnect the D2 ECU connector.

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

    Standard voltage:
    Tester Connection
    		Specified Condition
    D2-1 (+B) - Body ground
    		10 to 14 V

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    D2-14 (GND) - Body ground
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK RESISTANCE OF COMMUNICATION LINE

  1. Disconnect the P19 and G1 ECU connectors (w/o Driving position memory).



  1. Disconnect the P19 and T4 ECU connectors (w/ Driving position memory).


    B111053E02

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

    Standard resistance:

    Tester Connection
    		Specified Condition
    D2-9 (MPX1) - P19-7 (MPX1)
    		Below 1 Ω
    D2-9 (MPX1) - G1-12 (MPD2) (*2)
    		Below 1 Ω
    D2-9 (MPX1) - T4-5 (MPX1) (*1)
    		Below 1 Ω

    *1: w/ Driving position memory
    *2: w/o Driving position memory



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE DOUBLE DOOR LOCK ECU