Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001FYRQ
Model Year Start: 2019 Model: RAV4 Prod Date Range: [11/2018 - 12/2021]
Title: NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): Open in Bus 5 Main Bus Line; 2019 - 2021 MY RAV4 [11/2018 - 12/2021]

Open in Bus 5 Main Bus Line

DESCRIPTION

There may be an open circuit in one of the CAN main bus wire when the resistance between terminals 15 (CA5H) and 16 (CA5L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher.

Symptom

Trouble Area
*1: w/ Headlight ECU

*2: w/ Power Back Door System, Memory or Headlight ECU

Resistance between terminals 15 (CA5H) and 16 (CA5L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher.
  • CAN main bus wire or connector
  • Combination meter assembly
  • Central gateway ECU (network gateway ECU)
  • No. 1 CAN junction connector
  • No. 5 CAN junction connector*1
  • No. 7 CAN junction connector*2

This malfunction is not related to the lines of a CAN branch or to ECUs or sensors connected to a CAN branch.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

NOTICE:

  • Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.

    Click here 2019 - 2024 MY RAV4 [11/2018 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): HOW TO PROCEED WITH TROUBLESHOOTING

  • Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
  • After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

    Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION

  • Some parts must be initialized and set when replacing or removing and installing parts.

    Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION 2020 MY RAV4 RAV4 HV [10/2019 - 06/2020]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION 2020 MY RAV4 RAV4 HV [06/2020 - 08/2020]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION

  • After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.

    DTC check procedure: Turn the ignition switch to ON and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.

  • After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed as normal.

    Click here 2019 MY RAV4 [11/2018 - 02/2019]; NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): DIAGNOSIS SYSTEM 2019 MY RAV4 [02/2019 - 10/2019]; NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): DIAGNOSIS SYSTEM 2020 MY RAV4 [10/2019 - 08/2020]; NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): DIAGNOSIS SYSTEM 2021 MY RAV4 [08/2020 - 12/2021]; NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): DIAGNOSIS SYSTEM

  • When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

HINT:

  • Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.
  • When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.

PROCEDURE

1.

CHECK FOR OPEN IN CAN BUS WIRE (NO. 1 CAN JUNCTION CONNECTOR)

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Disconnect the No. 1 CAN junction connector.

*a

Front view of wire harness connector

(to No. 1 CAN Junction Connector)

*b
  • to No. 7 CAN Junction Connector (w/ Power Back Door System, Memory or Headlight ECU)
  • to Combination Meter Assembly (w/o Power Back Door System, Memory and Headlight ECU)

*c
  • to No. 5 CAN Junction Connector (w/ Headlight ECU)
  • to Central Gateway ECU (Network Gateway ECU) (w/o Headlight ECU)

-

-

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

Connected to
*1: w/ Power Back Door System, Memory or Headlight ECU

*2: w/o Power Back Door System, Memory and Headlight ECU

*3: w/ Headlight ECU

*4: w/o Headlight ECU

G96-1 (CANH) - G96-12 (CANL)

Cable disconnected from negative (-) battery terminal

108 to 132 Ω
  • No. 7 CAN junction connector*1
  • Combination meter assembly*2

G96-3 (CANH) - G96-14 (CANL)

Cable disconnected from negative (-) battery terminal

108 to 132 Ω
  • No. 5 CAN junction connector*3
  • Central gateway ECU (network gateway ECU)*4

Result

Proceed to

OK

A

NG (Central gateway ECU [network gateway ECU] CAN main wire) (w/o Headlight ECU)

B

NG (Combination meter assembly CAN main wire) (w/o Power Back Door System, Memory and Headlight ECU)

C

NG (No. 5 CAN junction connector CAN main wire) (w/ Headlight ECU)

D

NG (No. 7 CAN junction connector CAN main wire) (w/ Power Back Door System, Memory or Headlight ECU)

E
A

REPLACE NO. 1 CAN JUNCTION CONNECTOR
C

GO TO STEP 3

D

GO TO STEP 4

E

GO TO STEP 6

B

2.

CHECK FOR OPEN IN CAN BUS WIRE (CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU] - NO. 1 CAN JUNCTION CONNECTOR)

(a) Reconnect the G96 No. 1 CAN junction connector.

(b) Disconnect the central gateway ECU (network gateway ECU) connector.

*a

Front view of wire harness connector

(to Central Gateway ECU [Network Gateway ECU])

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G72-15 (CA5H) - G72-16 (CA5L)

Cable disconnected from negative (-) battery terminal

108 to 132 Ω
OK

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NG

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU] - NO. 1 CAN JUNCTION CONNECTOR)

3.

CHECK FOR OPEN IN CAN BUS WIRE (COMBINATION METER ASSEMBLY - NO. 1 CAN JUNCTION CONNECTOR)

(a) Reconnect the G96 No. 1 CAN junction connector.

(b) Disconnect the combination meter assembly connector.

*a

Front view of wire harness connector

(to Combination Meter Assembly)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G18-9 (CANH) - G18-25 (CANL)

Cable disconnected from negative (-) battery terminal

108 to 132 Ω
OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (COMBINATION METER ASSEMBLY - NO. 1 CAN JUNCTION CONNECTOR)

4.

CHECK FOR OPEN IN CAN BUS WIRE (NO. 5 CAN JUNCTION CONNECTOR)

(a) Reconnect the G96 No. 1 CAN junction connector.

(b) Disconnect the No. 5 CAN junction connector.

*a

Front view of wire harness connector

(to No. 5 CAN Junction Connector)

*b

to No. 1 CAN Junction Connector

*c

to Central Gateway ECU (Network Gateway ECU)

-

-

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

Connected to

G105-9 (CANH) - G105-20 (CANL)

Cable disconnected from negative (-) battery terminal

108 to 132 Ω

No. 1 CAN junction connector

G105-11 (CANH) - G105-22 (CANL)

Cable disconnected from negative (-) battery terminal

108 to 132 Ω

Central gateway ECU (network gateway ECU)

Result

Proceed to

OK

A

NG (Central gateway ECU [network gateway ECU] CAN main wire)

B

NG (No. 1 CAN junction connector CAN main wire)

C
A

REPLACE NO. 5 CAN JUNCTION CONNECTOR
C

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION CONNECTOR)
B

5.

CHECK FOR OPEN IN CAN BUS WIRE (CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU] - NO. 5 CAN JUNCTION CONNECTOR)

(a) Reconnect the G105 No. 5 CAN junction connector.

(b) Disconnect the central gateway ECU (network gateway ECU) connector.

*a

Front view of wire harness connector

(to Central Gateway ECU [Network Gateway ECU])

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G72-15 (CA5H) - G72-16 (CA5L)

Cable disconnected from negative (-) battery terminal

108 to 132 Ω
OK

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NG

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU] - NO. 5 CAN JUNCTION CONNECTOR)

6.

CHECK FOR OPEN IN CAN BUS WIRE (NO. 7 CAN JUNCTION CONNECTOR)

(a) Reconnect the G96 No. 1 CAN junction connector.

(b) Disconnect the No. 7 CAN junction connector.

*a

Front view of wire harness connector

(to No. 7 CAN Junction Connector)

*b

to No. 1 CAN Junction Connector

*c

to Combination Meter Assembly

-

-

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

Connected to

N52-1 (CANH) - N52-7 (CANL)

Cable disconnected from negative (-) battery terminal

108 to 132 Ω

No. 1 CAN junction connector

N52-2 (CANH) - N52-8 (CANL)

Cable disconnected from negative (-) battery terminal

108 to 132 Ω

Combination meter assembly

Result

Proceed to

OK

A

NG (Combination meter assembly CAN main wire)

B

NG (No. 1 CAN junction connector CAN main wire)

C
A

REPLACE NO. 7 CAN JUNCTION CONNECTOR
C

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 7 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION CONNECTOR)
B

7.

CHECK FOR OPEN IN CAN BUS WIRE (COMBINATION METER ASSEMBLY - NO. 7 CAN JUNCTION CONNECTOR)

(a) Reconnect the N52 No. 7 CAN junction connector.

(b) Disconnect the combination meter assembly connector.

*a

Front view of wire harness connector

(to Combination Meter Assembly)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G18-9 (CANH) - G18-25 (CANL)

Cable disconnected from negative (-) battery terminal

108 to 132 Ω
OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (COMBINATION METER ASSEMBLY - NO. 7 CAN JUNCTION CONNECTOR)