Toyota Tacoma manuals

Toyota Tacoma (2015-2018) Service Manual: Tire Pressure Monitor Receiver Communication Stop (B1247)

Toyota Tacoma (2015-2018) Service Manual / 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

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 (See page ) of the transmitter IDs into the tire ) after registration (See page pressure warning ECU and receiver after the ECU has been replaced. ) of the transmitter IDs into the tire pressure warning ECU and receiver after the ECU has been replaced.
  • If the main body ECU (multiplex network body ECU) is replaced, refer to Registration (See page *: w/ Smart Key System ).*

    *: w/ Smart Key System

HINT:

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

PROCEDURE

1.

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

(a) Disconnect the T14*1, T25*2, T24*3 tire pressure warning ECU and receiver connector.

(b) Disconnect the M6 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

T14-4 (RDA) - M6-4 (RDA)*1

T25-4 (RDA) - M6-4 (RDA)*2

T24-4 (RDA) - M6-4 (RDA)*3

Always

Below 1 Ω

T14-4 (RDA) or M6-4 (RDA) - Body ground*1

T25-4 (RDA) or M6-4 (RDA) - Body ground*2

T24-4 (RDA) or M6-4 (RDA) - Body ground*3

Always

10 kΩ or higher
  • *1: w/o Wireless Door Lock System
  • *2: w/o Smart Key System with Wireless Door Lock System
  • *3: w/ Smart Key System
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

T14-12 (GND) - Body ground*1

T25-12 (GND) - Body ground*2

T24-12 (GND) - Body ground*3

Always

Below 1 Ω

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

T14-1 (IG) - Body ground*1

T25-1 (IG) - Body ground*2

T24-1 (IG) - Body ground*3

Ignition switch ON

10 to 16 V
Text in Illustration

*a

Front view of wire harness connector

(to Tire Pressure Warning ECU and Receiver)
  • *1: w/o Wireless Door Lock System
  • *2: w/o Smart Key System with Wireless Door Lock System
  • *3: w/ Smart Key System
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 (See page ).

NEXT

4.

CHECK DTC OUTPUT

(a) Clear the DTCs (See page (b) Turn the ignition switch off. ).

(b) Turn the ignition switch off.

(c) Turn the ignition switch to ON.

(d) Check for DTCs (See page OK: ).

OK:

DTC B1247 is not output.

OK

END
NG

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