- 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
- No. 7 CAN junction connector
| Last Modified: 01-30-2024 | 6.11:8.1.0 | Doc ID: RM100000001H5JF |
| Model Year Start: 2019 | Model: RAV4 HV | Prod Date Range: [02/2019 - 12/2021] |
| Title: NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Check Bus 5 Line for Short to GND; 2019 - 2021 MY RAV4 HV [02/2019 - 12/2021] | ||
|
Check Bus 5 Line for Short to GND |
DESCRIPTION
There may be a short circuit between one of the CAN bus wires 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 |
|
|
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.
Click here
![2019 - 2024 MY RAV4 HV [02/2019 - ]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV 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 (-) auxiliary 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 (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary 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 TO GND IN CAN BUS WIRE (NO. 1 CAN JUNCTION CONNECTOR) |
(a) Disconnect the cable from the negative (-) auxiliary 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 |
|
*c |
to Certification ECU (Smart Key ECU Assembly) (w/ Smart Key System) |
*d |
to No. 5 CAN Junction Connector |
|
*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 |
|---|---|---|---|
| *: w/ Smart Key System | |||
|
G96-1 (CANH) - G114-4 (CG) |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
No. 7 CAN junction connector |
|
G96-12 (CANL) - G114-4 (CG) |
|||
|
G96-2 (CANH) - G114-4 (CG) |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
Certification ECU (smart key ECU assembly)* |
|
G96-13 (CANL) - G114-4 (CG) |
|||
|
G96-3 (CANH) - G114-4 (CG) |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
No. 5 CAN junction connector |
|
G96-14 (CANL) - G114-4 (CG) |
|||
|
G96-4 (CANH) - G114-4 (CG) |
Cable disconnected from negative (-) auxiliary 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 (-) auxiliary battery terminal |
200 Ω or higher |
Air conditioning amplifier assembly |
|
G96-16 (CANL) - G114-4 (CG) |
|||
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (No. 5 CAN junction connector CAN main wire) |
B |
|
NG (No. 7 CAN junction connector CAN main wire) |
C |
|
NG (Wire to ECU or sensor) |
D |
| A |
|
REPLACE NO. 1 CAN JUNCTION CONNECTOR |
| C |
|
| D |
|
|
|
2. |
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 |
Front view of DLC3 |
|
*c |
to No. 1 CAN Junction Connector |
*d |
to Headlight ECU Sub-assembly RH (w/ Headlight ECU) |
|
*e |
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 |
|---|---|---|---|
| *: w/ Headlight ECU | |||
|
G105-9 (CANH) - G114-4 (CG) |
Cable disconnected from negative (-) auxiliary 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 (-) auxiliary 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 (-) auxiliary 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 |
|
|
|
3. |
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 (-) auxiliary 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) |
|
4. |
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 (-) auxiliary 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 (-) auxiliary 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 (-) auxiliary 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 (-) auxiliary 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 (-) auxiliary 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 |
|
|
5. |
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 ground is connected.
Click here
|
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
HINT:
|
|
| OK |
|
REPLACE ECU OR SENSOR |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|