Toyota Tundra Service Manual: Tire Pressure Monitor Receiver Communication Stop (B1247)

Toyota Tundra Service Manual / Engine, Hybrid System / Tire And Wheel / Tire Pressure Warning System / Tire Pressure Monitor Receiver Communication Stop (B1247)

DESCRIPTION

The main body ECU (multiplex network body ECU) and tire pressure warning ECU and receiver are connected using 2 direct lines that they use to communicate with each other.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Note

B1247

Tire Pressure Monitor Receiver Communication Stop

In diagnostic mode, an applicable RDA signal cannot be received within 10 seconds after a PRG signal is sent from the main body ECU (multiplex network body ECU).

  • Tire pressure warning ECU and receiver
  • Wire harness or connector
  • Main body ECU (multiplex network body ECU)

This DTC is for main body ECU (multiplex network body ECU)

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the tire pressure warning ECU and receiver, read the transmitter IDs stored in the old ECU using the Techstream and write them down before removal.
  • It is necessary to perform initialization after registration of the transmitter IDs into the tire pressure warning ECU and receiver after the ECU has been replaced.

HINT:

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

PROCEDURE

1.

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

(a) Disconnect the P21 tire pressure warning ECU and receiver connector.

(b) Disconnect the J165 main body ECU (multiplex network body ECU) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

P21-4 (RDA) - J165-4 (RDA)

Always

Below 1 Ω

P21-4 (RDA) or J165-4 (RDA) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

P21-12 (GND) - Body ground

Always

Below 1 Ω

*a

Front view of wire harness connector

(to Tire Pressure Warning ECU and Receiver)

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

P21-1 (IG) - Body ground

Ignition switch ON

11 to 14 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

(a) Replace the tire pressure warning ECU and receiver.

Click here

NEXT

4.

CHECK DTC OUTPUT

(a) Clear the DTCs.

Click here

(b) Turn the ignition switch off.

(c) Turn the ignition switch to ON.

(d) Check for DTCs.

Click here

OK:

DTC B1247 is not output.

OK

END

NG

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    Tire Pressure Warning System

    Transmitter ID1 Operation Stop (C2111/11-C2114/14)

    See More:

    Toyota Tundra Service Manual > Sfi System: Basic Inspection
    CAUTION / NOTICE / HINT When a malfunction is not confirmed by the DTC check, troubleshooting should be carried out in all circuits considered to be possible causes of the problem. In many cases, by carrying out the basic engine check shown in the following flowchart, the location of the problem can ...

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