Dtc B1247 Tire Pressure Monitor Receiver Communication Stop

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK TIRE PRESSURE WARNING ECU AND RECEIVER (RDA TERMINAL)

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - TIRE PRESSURE WARNING ECU AND RECEIVER)

CHECK HARNESS AND CONNECTOR (POWER SOURCE OF TIRE PRESSURE WARNING ECU AND RECEIVER)

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

1. When replacing the tire pressure warning ECU, read the IDs stored in the old ECU using the Techstream and write them down before removal.
   
2. It is necessary to perform initialization (YARIS_NCP93 RM000000XMZ073X.html) after registration (YARIS_NCP93 RM000000XN107WX.html) of the transmitter IDs into the tire pressure warning ECU after the ECU has been replaced.
   
3. When replacing the tire pressure warning ECU and receiver on vehicles equipped with the wireless door lock control system, be sure to perform Registration of Recognition Code to register the transmitter IDs after ECU replacement (YARIS_NCP93 RM0000023D302UX.html).
   

HINT:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

1. Disconnect the main body ECU (multiplex network body ECU) D143 connector.
   

2. Using an oscilloscope, check waveform.
   

   Text in Illustration

   *a	Component with harness connected (Tire Pressure Warning ECU and Receiver)
   *b	Example
   *c	GND

   Waveform:

   Item	Contents
   Terminal	J69-4 (RDA) - J69-12 (GND)
   Tool setting	5 V/DIV, 500 μs./DIV.
   Vehicle condition	Ignition switch ON

   OK:

   Waveform alternates between high and low, where high is a voltage that is between the IG power source voltage and a voltage 2.2 V lower than the IG power source voltage.
   

   HINT:

   The waveform shown in the illustration is an example. If the tester displays a waveform that alternates between high and low, where high is a voltage that is between the IG power source voltage and a voltage 2.2 V lower than the IG power source voltage, and where low is a voltage of between 0 and 1.2 V, the ECU can be judged normal.

1. Disconnect the tire pressure warning ECU and receiver J69 connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   J69-4 (RDA) - D143-26 (RDA)	Always	Below 1 Ω
   D143-26 (RDA) - Body ground	Always	10 kΩ or higher

1. Disconnect the tire pressure warning ECU and receiver J69 connector.
   

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

   Standard Voltage:

   Tester Connection	Switch Condition	Specified Condition
   J69-1 (IG) - Body ground	Ignition switch ON	11 to 14 V
   	Ignition switch off	Below 1 V
   J69-7 (+B) - Body ground *1	Always	11 to 14 V

   1. *1: w/ Wireless Door Lock System
      

3. Measure the resistance according to the value(s) in the table below.
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   J69-12 (GND) - Body ground	Always	Below 1 Ω

   Text in Illustration

   *A	w/ Wireless Door Lock System
   *a	Front view of wire harness connector (to Tire Pressure Warning ECU and Receiver)