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.

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

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

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

Click here

4.	CHECK DTC OUTPUT

(a) Clear the DTCs.

Click here

(b) Turn the ignition switch off.

(d) Check for DTCs.

Click here

OK:

DTC B1247 is not output.

END

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

Tire Pressure Warning System

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

See More:

Toyota Tundra Owners Manual > Steps to take in an emergency: If the vehicle becomes stuck
Carry out the following procedures if the tires spin or the vehicle becomes stuck in mud, dirt or snow: 1. Stop the engine. Set the parking brake and shift the shift lever to P. 2. Remove the mud, snow or sand from around the rear wheels. 3. Place wood, stones or some other material to help provide ...