DTC    B1207    Smart ECU Stop

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DESCRIPTION

HINT:
This DTC is only output on vehicles equipped with a smart access with push-button start.

  1. This DTC is detected when communication between the certification ECU and gateway ECU stops for more than 10 seconds.

DTC No.
DTC Detection Condition
Trouble Area
B1207
BEAN certification ECU communication stops
  1. Certification ECU assembly
  1. Wire harness

WIRING DIAGRAM


B108870E03


INSPECTION PROCEDURE

1.CHECK WIRE HARNESS (CERTIFICATION ECU - BATTERY AND BODY GROUND)
B109193E02

  1. Disconnect the V28 ECU connector.

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

    Standard voltage:
    Tester Connection
    		Specified Condition
    V28-1 (+B1) - Body ground
    		10 to 14 V

    Standard resistance:
    Tester Connection
    		Specified Condition
    V28-17 (E) - Body ground
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


2.CHECK RESISTANCE OF COMMUNICATION LINE

E109405E02

  1. Disconnect the c7, L66, N4 and V28 ECU connectors.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    V28-27 (MPX1) - N4-8 (MPX1)
    		Below 1 Ω
    V28-27 (MPX1) - c7-1 (MPX1)
    		Below 1 Ω
    V28-28 (MPX2) - L66-12 (MPD2)
    		Below 1 Ω

    Result:
    Result
    		Proceed to
    Both are OK
    		A
    One or two is / are OK
    		B
    Both are NG
    		C



B
REPLACE CERTIFICATION ECU AND HARNESS AND CONNECTOR

C
REPAIR OR REPLACE HARNESS AND CONNECTOR
A

REPLACE CERTIFICATION ECU