- Short to +B in CAN main bus wire
- Short to +B in CAN branch wire
- Central gateway ECU (network gateway ECU)
- Headlight ECU sub-assembly LH*1
- Headlight ECU sub-assembly RH*1
- Position control ECU assembly*2
- Main body ECU (multiplex network body ECU)
- Certification ECU (smart key ECU assembly)*3
- Air conditioning amplifier assembly
- Multiplex network door ECU*4
- Combination meter assembly
- No. 1 CAN junction connector
- No. 5 CAN junction connector*1
- No. 7 CAN junction connector*5
| Last Modified: 01-30-2024 | 6.11:8.1.0 | Doc ID: RM100000001FYRS |
| Model Year Start: 2019 | Model: RAV4 | Prod Date Range: [11/2018 - 12/2021] |
| Title: NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): Check Bus 5 Line for Short to +B; 2019 - 2021 MY RAV4 [11/2018 - 12/2021] | ||
|
Check Bus 5 Line for Short to +B |
DESCRIPTION
There may be a short circuit between one of the CAN bus wires and +B when there is no resistance between terminal 15 (CA5H) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 16 (CA5L) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3.
|
Symptom |
Trouble Area |
|---|---|
|
*1: w/ Headlight ECU
*2: w/ Memory *3: w/ Smart Key System *4: w/ Power Back Door System *5: w/ Power Back Door System, Memory or Headlight ECU |
|
|
There is no resistance between terminal 15 (CA5H) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 16 (CA5L) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3. |
|
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 TO B+ 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 |
|
|
*c |
to Certification ECU (Smart Key ECU Assembly) (w/ Smart Key System) |
*d |
|
|
*e |
to Main Body ECU (Multiplex Network Body ECU) |
*f |
to Air Conditioning Amplifier Assembly |
|
*g |
Front view of DLC3 |
- |
- |
(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 and Headlight ECU
*2: w/ Power Back Door System, Memory or Headlight ECU *3: w/ Smart Key System *4: w/ Headlight ECU *5: w/o Headlight ECU |
|||
|
G96-1 (CANH) - G114-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
|
|
G96-12 (CANL) - G114-16 (BAT) |
|||
|
G96-2 (CANH) - G114-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Certification ECU (smart key ECU assembly)*3 |
|
G96-13 (CANL) - G114-16 (BAT) |
|||
|
G96-3 (CANH) - G114-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
|
|
G96-14 (CANL) - G114-16 (BAT) |
|||
|
G96-4 (CANH) - G114-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Main body ECU (multiplex network body ECU) |
|
G96-15 (CANL) - G114-16 (BAT) |
|||
|
G96-5 (CANH) - G114-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Air conditioning amplifier assembly |
|
G96-16 (CANL) - G114-16 (BAT) |
|||
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (Central gateway ECU [network gateway ECU] CAN main wire) (w/o Headlight ECU) |
B |
|
NG (No. 5 CAN junction connector CAN main wire) (w/ Headlight ECU) |
C |
|
NG (No. 7 CAN junction connector CAN main wire) (w/ Power Back Door System, Memory or Headlight ECU) |
D |
|
NG (Wire to ECU or sensor) |
E |
| A |
|
REPLACE NO. 1 CAN JUNCTION CONNECTOR |
| C |
|
| D |
|
| E |
|
|
|
2. |
CHECK FOR SHORT TO B+ 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. |
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
G72-15 (CA5H) - G114-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
|
G72-16 (CA5L) - G114-16 (BAT) |
| OK |
|
REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)
|
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU] - NO. 1 CAN JUNCTION CONNECTOR) |
|
3. |
CHECK FOR SHORT TO B+ 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 Headlight ECU Sub-assembly RH |
*d |
to Central Gateway ECU (Network Gateway ECU) |
|
*e |
Front view of DLC3 |
- |
- |
(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) - G114-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
No. 1 CAN junction connector |
|
G105-20 (CANL) - G114-16 (BAT) |
|||
|
G105-10 (CANH) - G114-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Headlight ECU sub-assembly RH |
|
G105-21 (CANL) - G114-16 (BAT) |
|||
|
G105-11 (CANH) - G114-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Central gateway ECU (network gateway ECU) |
|
G105-22 (CANL) - G114-16 (BAT) |
|
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 |
|
NG (Wire to ECU or sensor) |
D |
| 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) |
| D |
|
|
|
4. |
CHECK FOR SHORT TO B+ 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. |
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
G72-15 (CA5H) - G114-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
|
G72-16 (CA5L) - G114-16 (BAT) |
| OK |
|
REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)
|
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU] - NO. 5 CAN JUNCTION CONNECTOR) |
|
5. |
CHECK FOR SHORT TO B+ 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 |
*d |
to Multiplex Network Door ECU (w/ Power Back Door System) |
|
*e |
to Position Control ECU Assembly (w/ Memory) |
*f |
to Headlight ECU Sub-assembly LH (w/ Headlight ECU) |
|
*g |
Front view of DLC3 |
- |
- |
(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 *3: w/ Headlight ECU |
|||
|
N52-1 (CANH) - G114-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
No. 1 CAN junction connector |
|
N52-7 (CANL) - G114-16 (BAT) |
|||
|
N52-2 (CANH) - G114-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Combination meter assembly |
|
N52-8 (CANL) - G114-16 (BAT) |
|||
|
N52-3 (CANH) - G114-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Multiplex network door ECU*1 |
|
N52-9 (CANL) - G114-16 (BAT) |
|||
|
N52-4 (CANH) - G114-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Position control ECU assembly*2 |
|
N52-10 (CANL) - G114-16 (BAT) |
|||
|
N52-5 (CANH) - G114-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Headlight ECU sub-assembly LH*3 |
|
N52-11 (CANL) - G114-16 (BAT) |
|||
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (No. 1 CAN junction connector CAN main wire) |
B |
|
NG (Wire to ECU or sensor) |
C |
| A |
|
REPLACE NO. 7 CAN JUNCTION CONNECTOR |
| B |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 7 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION CONNECTOR) |
| C |
|
|
6. |
CHECK FOR SHORT TO B+ IN CAN BUS WIRE (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 bus wire shorted to +B 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) - G114-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
|
G72-16 (CA5L) - G114-16 (BAT) |
HINT:
- If the resistance changes to 6 kΩ or higher 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 to +B 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 |
|
|