- Short in CAN main bus wire
- Short 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, *3
- Clearance warning ECU assembly*4
- Swing grille actuator assembly*5
- Radiator shutter sub-assembly*5
- Inner rear view mirror assembly*6
- 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: RM100000001R233 |
| Model Year Start: 2021 | Model: RAV4 | Prod Date Range: [08/2020 - 12/2021] |
| Title: NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): Check Bus 1 Lines for Short Circuit; 2021 MY RAV4 [08/2020 - 12/2021] | ||
|
Check Bus 1 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 23 (CA1H) and 8 (CA1L) of the central gateway ECU (network gateway ECU) is below 54 Ω.
|
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/ Grille Shutter System *6: w/ Garage Door Opener System (for Digital Inner Mirror Type) |
|
|
Resistance between terminals 23 (CA1H) and 8 (CA1L) of 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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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 IN CAN BUS WIRES (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 Swing Grille Actuator Assembly (w/ Grille Shutter System) |
|
*e |
to Parking Assist ECU (w/ Panoramic View Monitor System) |
*f |
to Forward Recognition Camera |
|
*g |
to Clearance Warning ECU Assembly (w/ Intuitive Parking Assist System) |
*h |
to Central Gateway ECU (Network Gateway ECU) |
|
*i |
to Inner Rear View Mirror Assembly (w/ Garage Door Opener System [for Digital Inner Mirror Type]) |
- |
- |
(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/ Grille Shutter System *4: w/ Garage Door Opener System (for Digital Inner Mirror Type) |
|||
|
G102-2 (CANH) - G102-12 (CANL) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Millimeter wave radar sensor assembly |
|
G102-3 (CANH) - G102-13 (CANL) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
No. 8 CAN junction connector |
|
G102-4 (CANH) - G102-14 (CANL) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Swing grille actuator assembly*3 |
|
G102-5 (CANH) - G102-15 (CANL) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Parking assist ECU*2 |
|
G102-6 (CANH) - G102-16 (CANL) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Forward recognition camera |
|
G102-7 (CANH) - G102-17 (CANL) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Clearance warning ECU assembly*1 |
|
G102-8 (CANH) - G102-18 (CANL) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
Central gateway ECU (network gateway ECU) |
|
G102-10 (CANH) - G102-20 (CANL) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Inner rear view mirror assembly*4 |
|
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 (Swing grille actuator assembly CAN branch wire) |
D |
|
NG (Wire to ECU or sensor) |
E |
| A |
|
REPLACE NO. 2 CAN JUNCTION CONNECTOR |
| C |
|
| D |
|
| E |
|
|
|
2. |
CHECK FOR SHORT IN CAN BUS WIRES (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) - G72-8 (CA1L) |
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. 2 CAN JUNCTION CONNECTOR) |
|
3. |
CHECK FOR SHORT IN CAN BUS WIRES (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/ Panoramic View Monitor System, w/ Parking Assist Monitor System) |
|
*e |
to No. 1 CAN Junction Terminal |
- |
- |
(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/ Panoramic View Monitor System *3: w/ Parking Assist Monitor System |
|||
|
N53-1 (CANH) - N53-7 (CANL) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
No. 2 CAN junction connector |
|
N53-2 (CANH) - N53-8 (CANL) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Blind spot monitor sensor LH*1 |
|
N53-3 (CANH) - N53-9 (CANL) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Television camera assembly*2, *3 |
|
N53-4 (CANH) - N53-10 (CANL) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
No. 1 CAN junction terminal |
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (No. 1 CAN junction terminal CAN main wire) |
B |
|
NG (No. 2 CAN junction connector CAN main wire) |
C |
|
NG (Wire to ECU or sensor) |
D |
| A |
|
REPLACE NO. 8 CAN JUNCTION CONNECTOR |
| C |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 8 CAN JUNCTION CONNECTOR - NO. 2 CAN JUNCTION CONNECTOR) |
| D |
|
|
|
4. |
CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 CAN JUNCTION TERMINAL - NO. 8 CAN JUNCTION CONNECTOR) |
(a) Reconnect the N53 No. 8 CAN junction connector.
|
(b) Disconnect the No. 1 CAN junction terminal connector. |
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
N54-3 (CANH) - N54-2 (CANL) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
| OK |
|
REPLACE NO. 1 CAN JUNCTION TERMINAL |
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 1 CAN JUNCTION TERMINAL - NO. 8 CAN JUNCTION CONNECTOR) |
|
5. |
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 line is connected.
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|
(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 |
|
6. |
CHECK FOR SHORT IN CAN BUS WIRES (SWING GRILLE ACTUATOR ASSEMBLY BRANCH WIRE) |
(a) Reconnect the G102 No. 2 CAN junction connector.
|
(b) Disconnect the swing grille actuator assembly connector. |
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A-6 (CANP) - A-5 (CANN) |
Cable disconnected from negative (-) battery terminal |
54 to 69 Ω |
| OK |
|
|
|
7. |
CHECK FOR SHORT IN CAN BUS WIRES (RADIATOR SHUTTER SUB-ASSEMBLY BRANCH WIRE) |
(a) Reconnect the swing grille actuator assembly connector.
|
(b) Disconnect the radiator shutter sub-assembly connector. |
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A50-2 (CANP) - A50-3 (CANN) |
Cable disconnected from negative (-) battery terminal |
54 to 69 Ω |
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (RADIATOR SHUTTER SUB-ASSEMBLY - NO. 2 CAN JUNCTION CONNECTOR) |
|
|