TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM: B1247; Tire Pressure Monitor Receiver Communication Stop; 2023 - 2024 MY RAV4 RAV4 HV [10/2022

Last Modified: 01-30-2024	6.11:8.1.0	Doc ID: RM1000000027MUS
Model Year Start: 2023	Model: RAV4	Prod Date Range: [10/2022 - ]
Title: TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM: B1247; Tire Pressure Monitor Receiver Communication Stop; 2023 - 2024 MY RAV4 RAV4 HV [10/2022 - ]

DTC

B1247

Tire Pressure Monitor Receiver Communication Stop

DESCRIPTION

The main body ECU (multiplex network body ECU) and tire pressure warning ECU and receiver communicate by direct line. If a malfunction occurs in this communication signal, B1247 is output by the main body ECU (multiplex network body ECU).

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Note
B1247	Tire Pressure Monitor Receiver Communication Stop	Communication between the tire pressure warning ECU and receiver and main body ECU (multiplex network body ECU) is interrupted for 10 seconds or more.	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 and number of the transmitters (4 or 5) 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.
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.*
- for HV Model:
  Click here
- for Gasoline Model:
  Click here

*: w/ Smart Key System

PROCEDURE

1.	INSPECT TIRE PRESSURE WARNING ECU AND RECEIVER (OUTPUT WAVEFORM)

(a) Using an oscilloscope, check the waveform.

NOTICE:

With the connector connected, check from the backside of the connector.

Standard Voltage:

Tester Connection	Tool Setting Range	Condition	Specified Condition
M60-4 (RDA) - Body ground	5 V/DIV.5 ms./DIV.	Ignition switch ON	Waveform generation

Component with harness connected

(Tire Pressure Warning ECU and Receiver)

GND

Result	Proceed to
Waveform is as shown in the illustration. (Waveform alternates between 10.5 V or higher and 0.5 V or less)	A
Waveform does not change from 10.5 V or higher	B
Waveform does not change from 0.5 V or less	C

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

2.	CHECK TERMINAL VOLTAGE (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) OUTPUT)

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

*a	Front view of wire harness connector (to Tire Pressure Warning ECU and Receiver)

(b) Turn the ignition switch to ON.

Standard Voltage:

Tester Connection	Condition	Specified Condition
M60-4 (RDA) - Body ground	Ignition switch ON	10.5 V or higher

REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

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

(a) Turn the ignition switch off.

(b) Disconnect the G45 main body ECU (multiplex network body ECU) connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
G45-10 (RDA) - M60-4 (RDA)	Always	Below 1 Ω
G45-10 (RDA) or M60-4 (RDA) - Body ground	Always	10 kΩ or higher

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

REPAIR OR REPLACE HARNESS OR CONNECTOR