DTC B1247: Tire Pressure Monitor Receiver Communication Stop: Procedure

1. Remove the ECU-IG LH fuse from the main body ECU (cowl side junction block LH).
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   ECU-IG LH	Always	Below 1 Ω

NG → REPLACE FUSE (ECU-IG LH) 

OK: Go to next step 

1. Disconnect the J49 connector.
   Fig 1: Identifying J49 Connector Terminal

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2. Measure the voltage and resistance according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   J49-1 (IG) - Body ground	Engine switch on (IG)	11 to 14 V

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   J49-6 (GND) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (TIRE PRESSURE WARNING ECU AND RECEIVER - BATTERY AND BODY GROUND) 

OK: Go to next step 

1. Disconnect the J49, J34 and J76 connectors.
   Fig 2: Identifying J49, J34 And J76 Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   J49-3 (MPX1) - J34-18 (MPX-)	Always	Below 1 Ω
   J49-2 (MPX2) - J76-4 (MPI1)	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   4