- 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: 01-30-2024 | 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.
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![2019 - 2024 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 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.
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-
Some parts must be initialized and set when replacing or removing and installing parts.
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-
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.
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- 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 |
|
|