DTC    B1247    Tire Pressure Monitor Receiver Communication Stop

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DESCRIPTION

This DTC is detected when the communication between the tire pressure warning ECU and gateway ECU stops for more than 10 seconds.

DTC No.
DTC Detection Condition
Trouble Area
B1247
Tire pressure warning ECU receiver communication stops
  1. Tire pressure warning ECU
  2. Wire harness

WIRING DIAGRAM


B108904E04


INSPECTION PROCEDURE

1.CHECK WIRE HARNESS (TIRE PRESSURE WARNING ECU - BATTERY AND BODY GROUND)
B108903E07

  1. Disconnect the L45 ECU connector.

  1. Turn the engine switch on (IG).

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

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    L45-1 (IG) - Body ground
    		Engine switch on (IG)
    		10 to 14 V



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


2.CHECK WIRE HARNESS (TIRE PRESSURE WARNING ECU - BODY GROUND)
B108903E08

  1. Disconnect the L45 ECU connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    L45-7 (GND) - Body ground
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


3.CHECK WIRE HARNESS (TIRE PRESSURE WARNING ECU - COMBINATION METER)

E109413E03

  1. Disconnect the L45 ECU connector.

  1. Disconnect the L31 combination meter connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    L45-6 (MPX1) - L31-5 (MPX-)
    		Below 1 Ω
    L45-7 (GND)- Body ground
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


4.CHECK WIRE HARNESS (TIRE PRESSURE WARNING ECU - GATEWAY ECU)

E109414E02

  1. Disconnect the L45 ECU connector.

  1. Disconnect the L66 gateway ECU connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    L45-12 (MPX2) - L66-4 (MPI1)
    		Below 1 Ω
    L45-12 (MPX2 )- Body ground
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE TIRE PRESSURE WARNING ECU