- Short in CAN main bus wire
- Short in CAN branch wire
- Central gateway ECU (network gateway ECU)
- Airbag ECU assembly
- ECM
- Steering sensor
- Rack and pinion power steering gear assembly
- Brake booster with master cylinder assembly (skid control ECU)
- Parking brake ECU assembly
- Hybrid vehicle control ECU assembly
- No. 1 CAN junction connector
- No. 4 CAN junction connector
- No. 6 CAN junction connector
| Last Modified: 01-30-2024 | 6.11:8.1.0 | Doc ID: RM100000001FYHG |
| Model Year Start: 2019 | Model: RAV4 HV | Prod Date Range: [11/2018 - 02/2019] |
| Title: NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Check Bus 4 Lines for Short Circuit; 2019 MY RAV4 HV [11/2018 - 02/2019] | ||
|
Check Bus 4 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 22 (CA2H) and 7 (CA2L) of the central gateway ECU (network gateway ECU) is below 54 Ω.
|
Symptom |
Trouble Area |
|---|---|
|
Resistance between terminals 22 (CA2H) and 7 (CA2L) of the 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 MY RAV4 HV [11/2018 - 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 power 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 power 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.
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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 power switch on (IG) 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:
- 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 IN CAN BUS WIRES (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. 4 CAN Junction Connector |
|
*c |
to No. 6 CAN Junction Connector |
*d |
to Steering Sensor |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
Connected to |
|---|---|---|---|
|
G96-9 (CANH) - G96-20 (CANL) |
Cable disconnected from negative (-) auxiliary battery terminal |
108 to 132 Ω |
No. 4 CAN junction connector |
|
G96-10 (CANH) - G96-21 (CANL) |
Cable disconnected from negative (-) auxiliary battery terminal |
108 to 132 Ω |
No. 6 CAN junction connector |
|
G96-11 (CANH) - G96-22 (CANL) |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
Steering sensor |
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (No. 6 CAN junction connector CAN main wire) |
B |
|
NG (No. 4 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 IN CAN BUS WIRES (NO. 6 CAN JUNCTION CONNECTOR) |
(a) Reconnect the G96 No. 1 CAN junction connector.
(b) Disconnect the No. 6 CAN junction connector.
|
*a |
Front view of wire harness connector (to No. 6 CAN Junction Connector) |
*b |
to Central Gateway ECU (Network Gateway ECU) |
|
*c |
to No. 1 CAN Junction Connector |
*d |
to Parking Brake ECU Assembly |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
Connected to |
|---|---|---|---|
|
M31-3 (CANH) - M31-9 (CANL) |
Cable disconnected from negative (-) auxiliary battery terminal |
108 to 132 Ω |
Central gateway ECU (network gateway ECU) |
|
M31-4 (CANH) - M31-10 (CANL) |
Cable disconnected from negative (-) auxiliary battery terminal |
108 to 132 Ω |
No. 1 CAN junction connector |
|
M31-5 (CANH) - M31-11 (CANL) |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
Parking brake ECU assembly |
|
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. 6 CAN JUNCTION CONNECTOR |
| B |
|
| C |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION CONNECTOR) |
| D |
|
|
3. |
CHECK FOR SHORT IN CAN BUS WIRES (NO. 4 CAN JUNCTION CONNECTOR) |
(a) Reconnect the G96 No. 1 CAN junction connector.
(b) Disconnect the No. 4 CAN junction connector.
|
*a |
Front view of wire harness connector (to No. 4 CAN Junction Connector) |
*b |
to Brake Booster with Master Cylinder Assembly (Skid Control ECU) |
|
*c |
to Airbag ECU Assembly |
*d |
to Hybrid Vehicle Control ECU Assembly |
|
*e |
to No. 1 CAN Junction Connector |
*f |
to Rack and Pinion Power Steering Gear Assembly |
|
*g |
to ECM |
- |
- |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
Connected to |
|---|---|---|---|
|
G104-1 (CANH) - G104-7 (CANL) |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
Brake booster with master cylinder assembly (skid control ECU) |
|
G104-2 (CANH) - G104-8 (CANL) |
Cable disconnected from negative (-) auxiliary battery terminal |
108 to 132 Ω |
Airbag ECU assembly |
|
G104-3 (CANH) - G104-9 (CANL) |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
Hybrid vehicle control ECU assembly |
|
G104-4 (CANH) - G104-10 (CANL) |
Cable disconnected from negative (-) auxiliary battery terminal |
108 to 132 Ω |
No. 1 CAN junction connector |
|
G104-5 (CANH) - G104-11 (CANL) |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
Rack and pinion power steering gear assembly |
|
G104-6 (CANH) - G104-12 (CANL) |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
ECM |
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (Airbag ECU assembly CAN main wire) |
B |
|
NG (No. 1 CAN junction connector CAN main wire) |
C |
|
NG (Wire to ECU or sensor) |
D |
| A |
|
REPLACE NO. 4 CAN JUNCTION CONNECTOR |
| B |
|
| C |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION CONNECTOR) |
| D |
|
|
4. |
CHECK FOR SHORT IN CAN BUS WIRES (CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU] - NO. 6 CAN JUNCTION CONNECTOR) |
(a) Reconnect the M31 No. 6 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 |
|---|---|---|
|
G72-22 (CA2H) - G72-7 (CA2L) |
Cable disconnected from negative (-) auxiliary battery terminal |
108 to 132 Ω |
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU] - NO. 6 CAN JUNCTION CONNECTOR) |
|
5. |
CHECK FOR SHORT IN CAN BUS WIRES (AIRBAG ECU ASSEMBLY - NO. 4 CAN JUNCTION CONNECTOR) |
(a) Reconnect the G104 No. 4 CAN junction connector.
|
(b) Disconnect the airbag ECU assembly connector. Click here
|
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
G70-26 (CANH) - G70-27 (CANL) |
Cable disconnected from negative (-) auxiliary battery terminal |
108 to 132 Ω |
| OK |
|
| NG |
|
REPLACE CAN MAIN WIRE AND CONNECTOR (AIRBAG ECU ASSEMBLY - NO. 4 CAN JUNCTION CONNECTOR) |
|
6. |
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 |
|
|