- Short in CAN main bus wire
- Short in CAN branch wire
- Central gateway ECU (network gateway ECU)
- Position control ECU assembly*1
- Main body ECU (multiplex network body ECU)
- Certification ECU (smart key ECU assembly)*2
- Air conditioning amplifier assembly
- Multiplex network door ECU*3
- Combination meter assembly
- No. 1 CAN junction connector
- No. 7 CAN junction connector*4
| Last Modified: 05-08-2025 | 6.11:8.1.0 | Doc ID: RM1000000026P9A |
| Model Year Start: 2023 | Model: RAV4 | Prod Date Range: [10/2022 - 10/2023] |
| Title: NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): Check Bus 5 Lines for Short Circuit; 2023 MY RAV4 [10/2022 - 10/2023] | ||
|
Check Bus 5 Lines for Short Circuit |
DESCRIPTION
There may be a short circuit between the CAN main bus wire and/or CAN branch wire when the resistance between terminals 15 (CA5H) and 16 (CA5L) of the central gateway ECU (network gateway ECU) is below 54 Ω.
|
Symptom |
Trouble Area |
|---|---|
|
*1: w/ Memory
*2: w/ Smart Key System *3: w/ Power Back Door System *4: w/ Power Back Door System, Memory |
|
|
Resistance between terminals 15 (CA5H) and 16 (CA5L) of the central gateway ECU (network gateway ECU) is below 54 Ω. |
|
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 - 2025 MY RAV4 [11/2018 - ]; NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): HOW TO PROCEED WITH TROUBLESHOOTING](/t3Portal/stylegraphics/info.gif)
- 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 10 minutes 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
-
Some parts must be initialized and set when replacing or removing and installing parts.
Click here
-
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
- 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 SHORT IN CAN BUS WIRES (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 |
|
|
*c |
to Certification ECU (Smart Key ECU Assembly) (w/ Smart Key System) |
*d |
to Central Gateway ECU (Network Gateway ECU) |
|
*e |
to Main Body ECU (Multiplex Network Body ECU) |
*f |
to Air Conditioning Amplifier Assembly |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
Connected to |
|---|---|---|---|
|
*1: w/o Power Back Door System, Memory
*2: w/ Power Back Door System, Memory *3: w/ Smart Key System |
|||
|
G96-1 (CANH) - G96-12 (CANL) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
|
|
G96-2 (CANH) - G96-13 (CANL) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Certification ECU (smart key ECU assembly)*3 |
|
G96-3 (CANH) - G96-14 (CANL) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
Central gateway ECU (network gateway ECU) |
|
G96-4 (CANH) - G96-15 (CANL) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Main body ECU (multiplex network body ECU) |
|
G96-5 (CANH) - G96-16 (CANL) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Air conditioning amplifier assembly |
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (Central gateway ECU [network gateway ECU] CAN main wire) |
B |
|
NG (Combination meter assembly CAN main wire) (w/o Power Back Door System, Memory) |
C |
|
NG (No. 7 CAN junction connector CAN main wire) (w/ Power Back Door System, Memory) |
D |
|
NG (Wire to ECU or sensor) |
E |
| A |
|
REPLACE NO. 1 CAN JUNCTION CONNECTOR |
| C |
|
| D |
|
| E |
|
|
|
2. |
CHECK FOR SHORT IN CAN BUS WIRES (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. |
|
(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 |
|
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU] - NO. 1 CAN JUNCTION CONNECTOR) |
|
3. |
CHECK FOR SHORT IN CAN BUS WIRES (COMBINATION METER ASSEMBLY - NO. 1 CAN JUNCTION CONNECTOR) |
(a) Reconnect the G96 No. 1 CAN junction connector.
(b) Disconnect the combination meter assembly connector.
for 7 Inch Multi-information Display Type
|
*a |
Front view of wire harness connector (to Combination Meter Assembly) |
for 12.3 Inch Multi-information Display Type
|
*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:
for 7 Inch Multi-information Display Type
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
G18-9 (CANH) - G18-25 (CANL) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
for 12.3 Inch Multi-information Display Type
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
G140-31 (CANH) - G140-14 (CANL) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (COMBINATION METER ASSEMBLY - NO. 1 CAN JUNCTION CONNECTOR) |
|
4. |
CHECK FOR SHORT IN CAN BUS WIRES (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 |
*d |
to Multiplex Network Door ECU (w/ Power Back Door System) |
|
*e |
to Position Control ECU Assembly (w/ Memory) |
- |
- |
(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
*2: w/ Memory |
|||
|
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 |
|
N52-3 (CANH) - N52-9 (CANL) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Multiplex network door ECU*1 |
|
N52-4 (CANH) - N52-10 (CANL) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Position control ECU assembly*2 |
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (Combination meter assembly CAN main wire) |
B |
|
NG (No. 1 CAN junction connector CAN main wire) |
C |
|
NG (Wire to ECU or sensor) |
D |
| 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) |
| D |
|
|
|
5. |
CHECK FOR SHORT IN CAN BUS WIRES (COMBINATION METER ASSEMBLY - NO. 7 CAN JUNCTION CONNECTOR) |
(a) Reconnect the N52 No. 7 CAN junction connector.
(b) Disconnect the combination meter assembly connector.
for 7 Inch Multi-information Display Type
|
*a |
Front view of wire harness connector (to Combination Meter Assembly) |
for 12.3 Inch Multi-information Display Type
|
*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:
for 7 Inch Multi-information Display Type
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
G18-9 (CANH) - G18-25 (CANL) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
for 12.3 Inch Multi-information Display Type
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
G140-31 (CANH) - G140-14 (CANL) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (COMBINATION METER ASSEMBLY - NO. 7 CAN JUNCTION CONNECTOR) |
|
6. |
CHECK FOR SHORT IN CAN BUS WIRES (ECU, SENSOR) |
(a) Reconnect all wire harness connectors.
|
(b) Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the short circuited branch wire is connected. Click here
|
|
(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 |
54 to 69 Ω |
HINT:
- If the resistance becomes normal (between 54 and 69 Ω) when the connector is disconnected from the ECU or sensor, there may be a short in the ECU or sensor.
- If the resistance does not become normal when the connector is disconnected from the ECU or sensor, check for a short in the wire harness and repair or replace the wire harness or connector if necessary.
| OK |
|
REPLACE ECU OR SENSOR |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|