Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001ES1H
Model Year Start: 2019 Model: RAV4 Prod Date Range: [11/2018 - 10/2022]
Title: TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM: C2179; Tire Pressure Monitor ECU Communication Stop; 2019 - 2022 MY RAV4 RAV4 HV [11/2018 - 10/2022]

DTC

C2179

Tire Pressure Monitor ECU Communication Stop

DESCRIPTION

The main body ECU (multiplex network body ECU) sends signals to the tire pressure warning ECU and receiver via a direct line.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Note

C2179

Tire Pressure Monitor ECU Communication Stop

Communication between the main body ECU (multiplex network body ECU) and tire pressure warning ECU and receiver is interrupted for 10 seconds or more.

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

-

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 MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (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

G45-11 (PRG) - Body ground

5 V/DIV.5 ms./DIV.

Ignition switch ON

Waveform generation

*a

Component with harness connected

(Main Body ECU (Multiplex Network Body ECU))

*b

GND

Result

Proceed to

Waveform is as shown in the illustration. (Waveform alternates between 9.8 V or higher and 1.2 V or less)

A

Waveform does not change from 9.8 V or higher

B

Waveform does not change from 1.2 V or less

C

A

REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

B

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

C

2.

CHECK TERMINAL VOLTAGE (TIRE PRESSURE WARNING ECU AND RECEIVER OUTPUT)

(a) Disconnect the main body ECU (multiplex network body ECU) connector.

(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

G45-11 (PRG) - Body ground

Ignition switch ON

9.8 V or higher

*a

Front view of wire harness connector

(to Main Body ECU (Multiplex Network Body ECU))

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

3.

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

(a) Turn the ignition switch off.

(b) Disconnect the M8 tire pressure warning ECU and receiver connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

M8-5 (PRG) - G45-11 (PRG)

Always

Below 1 Ω

M8-5 (PRG) or G45-11 (PRG) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

CHECK HARNESS AND CONNECTOR (POWER SUPPLY - TIRE PRESSURE WARNING ECU AND RECEIVER)

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

M8-7 (+B) - Body ground

Always

10 to 16 V

M8-1 (IG) - Body ground

Ignition switch ON

10 to 16 V

*a

Front view of wire harness connector

(to Tire Pressure Warning ECU and Receiver)

OK

REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

NG (w/ Stop and Start System)

INSPECT STOP AND START SYSTEM (BACKUP BOOST CONVERTER CIRCUIT) 2019 MY RAV4 [11/2018 - 10/2019]; STOP AND START: STOP AND START SYSTEM: Backup Boost Converter Circuit 2020 MY RAV4 [10/2019 - 08/2020]; STOP AND START: STOP AND START SYSTEM: Backup Boost Converter Circuit 2021 MY RAV4 [08/2020 - 12/2021]; STOP AND START: STOP AND START SYSTEM: Backup Boost Converter Circuit 2022 MY RAV4 [12/2021 - 10/2022]; STOP AND START: STOP AND START SYSTEM: Backup Boost Converter Circuit

NG (w/o Stop and Start System)

REPAIR OR REPLACE HARNESS OR CONNECTOR