- Short to GND in CAN main bus wire
- Short to GND 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: RM100000001FYRT |
| 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 GND; 2019 - 2021 MY RAV4 [11/2018 - 12/2021] | ||
|
Check Bus 5 Line for Short to GND |
DESCRIPTION
There may be a short circuit between one of the CAN bus wire and GND when there is no resistance between terminal 15 (CA5H) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) of the DLC3, or terminal 16 (CA5L) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) 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 4 (CG) of the DLC3, or terminal 16 (CA5L) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) 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 GND 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) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
|
G96-12 (CANL) - G114-4 (CG) |
|||
|
G96-2 (CANH) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Certification ECU (smart key ECU assembly)*3 |
|
G96-13 (CANL) - G114-4 (CG) |
|||
|
G96-3 (CANH) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
|
G96-14 (CANL) - G114-4 (CG) |
|||
|
G96-4 (CANH) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Main body ECU (multiplex network body ECU) |
|
G96-15 (CANL) - G114-4 (CG) |
|||
|
G96-5 (CANH) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Air conditioning amplifier assembly |
|
G96-16 (CANL) - G114-4 (CG) |
|||
|
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 GND 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) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
G72-16 (CA5L) - G114-4 (CG) |
| 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 GND 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) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
No. 1 CAN junction connector |
|
G105-20 (CANL) - G114-4 (CG) |
|||
|
G105-10 (CANH) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Headlight ECU sub-assembly RH |
|
G105-21 (CANL) - G114-4 (CG) |
|||
|
G105-11 (CANH) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Central gateway ECU (network gateway ECU) |
|
G105-22 (CANL) - G114-4 (CG) |
|
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 GND 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) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
G72-16 (CA5L) - G114-4 (CG) |
| 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 GND 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) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
No. 1 CAN junction connector |
|
N52-7 (CANL) - G114-4 (CG) |
|||
|
N52-2 (CANH) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Combination meter assembly |
|
N52-8 (CANL) - G114-4 (CG) |
|||
|
N52-3 (CANH) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Multiplex network door ECU*1 |
|
N52-9 (CANL) - G114-4 (CG) |
|||
|
N52-4 (CANH) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Position control ECU assembly*2 |
|
N52-10 (CANL) - G114-4 (CG) |
|||
|
N52-5 (CANH) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Headlight ECU sub-assembly LH*3 |
|
N52-11 (CANL) - G114-4 (CG) |
|||
|
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 GND 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 GND 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) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
G72-16 (CA5L) - G114-4 (CG) |
HINT:
- If the resistance changes to 200 Ω 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 GND 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 |
|
|