Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001ES17
Model Year Start: 2019 Model: RAV4 Prod Date Range: [11/2018 - 10/2022]
Title: TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM: B1247; Tire Pressure Monitor Receiver Communication Stop; 2019 - 2022 MY RAV4 RAV4 HV [11/2018 - 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 2019 - 2021 MY RAV4 RAV4 HV [11/2018 - 12/2021]; TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM: INITIALIZATION 2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]; TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM: INITIALIZATION after registration 2019 MY RAV4 RAV4 HV [11/2018 - 10/2019]; TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM: REGISTRATION 2020 - 2021 MY RAV4 RAV4 HV [10/2019 - 12/2021]; TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM: REGISTRATION 2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]; TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM: 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 2019 MY RAV4 HV [11/2018 - 10/2019]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION 2020 - 2021 MY RAV4 HV [10/2019 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION 2022 - 2024 MY RAV4 HV [12/2021 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION

    • for Gasoline Model:

      Click here 2019 MY RAV4 [11/2018 - 10/2019]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION 2020 MY RAV4 [10/2019 - 08/2020]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION 2021 MY RAV4 [08/2020 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION 2022 - 2024 MY RAV4 [12/2021 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION

  • *: 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

M8-4 (RDA) - Body ground

5 V/DIV.5 ms./DIV.

Ignition switch ON

Waveform generation

*a

Component with harness connected

(Tire Pressure Warning ECU and Receiver)

*b

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
A

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

B

REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

C

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.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

M8-4 (RDA) - Body ground

Ignition switch ON

10.5 V or higher
OK

REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

NG

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.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G45-10 (RDA) - M8-4 (RDA)

Always

Below 1 Ω

G45-10 (RDA) or M8-4 (RDA) - Body ground

Always

10 kΩ or higher
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR