- Short to GND in CAN main bus wire
- Short to GND in CAN branch wire
- Central gateway ECU (network gateway ECU)
- Forward recognition camera
- Millimeter wave radar sensor assembly
- Blind spot monitor sensor LH*2
- Parking assist ECU*3
- Television camera assembly*1
- Clearance warning ECU assembly*4
- Inner rear view mirror assembly*5
- No. 2 CAN junction connector
- No. 8 CAN junction connector
- No. 1 CAN junction terminal
| Last Modified: 01-30-2024 | 6.11:8.1.0 | Doc ID: RM1000000026P8V |
| Model Year Start: 2023 | Model: RAV4 | Prod Date Range: [10/2022 - ] |
| Title: NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): Check Bus 1 Line for Short to GND; 2023 - 2024 MY RAV4 [10/2022 - ] | ||
|
Check Bus 1 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 23 (CA1H) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) of the DLC3, or terminal 8 (CA1L) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) of the DLC3.
|
Symptom |
Trouble Area |
|---|---|
|
*1: w/ Parking Assist Monitor System
*2: w/ Blind Spot Monitor System *3: w/ Panoramic View Monitor System *4: w/ Intuitive Parking Assist System *5: w/ Garage Door Opener System (for Digital Inner Mirror Type) |
|
|
There is no resistance between terminal 23 (CA1H) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) of the DLC3, or terminal 8 (CA1L) 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 [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.
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
HINT:
- Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.
- Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.
PROCEDURE
|
1. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 CAN JUNCTION CONNECTOR) |
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the No. 2 CAN junction connector.
|
*a |
Front view of wire harness connector (to No. 2 CAN Junction Connector) |
*b |
to Millimeter Wave Radar Sensor Assembly |
|
*c |
to No. 8 CAN Junction Connector |
*d |
to Parking Assist ECU (w/ Panoramic View Monitor System) |
|
*e |
to Forward Recognition Camera |
*f |
to Clearance Warning ECU Assembly (w/ Intuitive Parking Assist System) |
|
*g |
to Central Gateway ECU (Network Gateway ECU) |
*h |
to Inner Rear View Mirror Assembly (w/ Garage Door Opener System [for Digital Inner Mirror Type]) |
|
*i |
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/ Intuitive Parking Assist System
*2: w/ Panoramic View Monitor System *3: w/ Garage Door Opener System (for Digital Inner Mirror Type) |
|||
|
G102-2 (CANH) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Millimeter wave radar sensor assembly |
|
G102-12 (CANL) - G114-4 (CG) |
|||
|
G102-3 (CANH) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
No. 8 CAN junction connector |
|
G102-13 (CANL) - G114-4 (CG) |
|||
|
G102-5 (CANH) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Parking assist ECU*2 |
|
G102-15 (CANL) - G114-4 (CG) |
|||
|
G102-6 (CANH) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Forward recognition camera |
|
G102-16 (CANL) - G114-4 (CG) |
|||
|
G102-7 (CANH) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Clearance warning ECU assembly*1 |
|
G102-17 (CANL) - G114-4 (CG) |
|||
|
G102-8 (CANH) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Central gateway ECU (network gateway ECU) |
|
G102-18 (CANL) - G114-4 (CG) |
|||
|
G102-10 (CANH) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Inner rear view mirror assembly*3 |
|
G102-20 (CANL) - G114-4 (CG) |
|||
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (Central gateway ECU [network gateway ECU] CAN main wire) |
B |
|
NG (No. 8 CAN junction connector CAN main wire) |
C |
|
NG (Wire to ECU or sensor) |
D |
| A |
|
REPLACE NO. 2 CAN JUNCTION CONNECTOR |
| C |
|
| D |
|
|
|
2. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU] - NO. 2 CAN JUNCTION CONNECTOR) |
(a) Reconnect the G102 No. 2 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 |
|---|---|---|
|
G72-23 (CA1H) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
G72-8 (CA1L) - 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. 2 CAN JUNCTION CONNECTOR) |
|
3. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 8 CAN JUNCTION CONNECTOR) |
(a) Reconnect the G102 No. 2 CAN junction connector.
(b) Disconnect the No. 8 CAN junction connector.
|
*a |
Front view of wire harness connector (to No. 8 CAN Junction Connector) |
*b |
to No. 2 CAN Junction Connector |
|
*c |
to Blind Spot Monitor Sensor LH (w/ Blind Spot Monitor System) |
*d |
to Television Camera Assembly (w/ Parking Assist Monitor System) |
|
*e |
to No. 1 CAN Junction Terminal |
*f |
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/ Blind Spot Monitor System
*2: w/ Parking Assist Monitor System |
|||
|
N75-1 (CANH) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
No. 2 CAN junction connector |
|
N75-12 (CANL) - G114-4 (CG) |
|||
|
N75-2 (CANH) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Blind spot monitor sensor LH*1 |
|
N75-13 (CANL) - G114-4 (CG) |
|||
|
N75-3 (CANH) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Television camera assembly*2 |
|
N75-14 (CANL) - G114-4 (CG) |
|||
|
N75-4 (CANH) - G114-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
No. 1 CAN junction terminal |
|
N75-15 (CANL) - G114-4 (CG) |
|||
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (No. 2 CAN junction connector CAN main wire) |
B |
|
NG (Wire to ECU or sensor) |
C |
| A |
|
REPLACE NO. 8 CAN JUNCTION CONNECTOR |
| B |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 8 CAN JUNCTION CONNECTOR - NO. 2 CAN JUNCTION CONNECTOR) |
|
|
4. |
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 line shorted to GND 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 |
|
|