DTC    B1210    Power 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 power source control ECU stops for more than 10 seconds.

DTC No.
DTC Detection Condition
Trouble Area
B1210
Power source control ECU communication stops
  1. Power source control ECU
  1. Wire harness

WIRING DIAGRAM


B108906E03


INSPECTION PROCEDURE

1.INSPECT FUSE (AM2)

  1. Remove the AM2 fuse from the cowl side junction block RH.

  1. Measure the resistance of the fuse.

    Standard resistance:
    Below 1 Ω



NG
REPLACE FUSE
OK


2.CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - BATTERY AND BODY GROUND)
B109192E08

  1. Disconnect the L73 ECU connector.

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

    Standard voltage:
    Tester Connection
    		Specified Condition
    L73-33 (AM1) - Body ground
    		10 to 14 V
    L73-12 (AM2) - Body ground

    Standard resistance:
    Tester Connection
    		Specified Condition
    L73-6 (GND2) - Body ground
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


3.CHECK RESISTANCE OF COMMUNICATION LINE

E109363E02

  1. Disconnect the L66 and L73 ECU connectors.

  1. Disconnect the Y6 junction block connector.

  1. Disconnect the S5 switch connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    L73-7 (MPX1) - Y6-14 (MPX)
    		Below 1 Ω
    L73-7 (MPX1) - S5-7 (MPX1)
    L73-24 (MPX2) - L66-3 (MPD1)

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



B
REPLACE POWER SOURCE CONTROL ECU AND HARNESS AND CONNECTOR

C
REPAIR OR REPLACE HARNESS AND CONNECTOR
A

REPLACE POWER SOURCE CONTROL ECU