- Bus 5 CAN main wire or connector
- Central gateway ECU (network gateway ECU)
- No. 2 CAN junction connector
- No. 3 CAN junction connector
- No. 2 CAN junction terminal
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM1000000018DNF |
| Model Year Start: 2018 | Model: Sienna | Prod Date Range: [11/2017 - 08/2018] |
| Title: NETWORKING: CAN COMMUNICATION SYSTEM: Open in Bus 5 Main Bus Line; 2018 MY Sienna [11/2017 - 08/2018] | ||
|
Open in Bus 5 Main Bus Line |
DESCRIPTION
There may be an open circuit in one of the bus 5 main lines when the resistance between terminals 15 (CA5H) and 16 (CA5L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher.
|
Detection Item |
Trouble Area |
|---|---|
|
Resistance between terminals 15 (CA5H) and 16 (CA5L) of central gateway ECU (network gateway ECU) is 70 Ω or higher. |
|
This malfunction is not related to the lines of a bus 5 branch or to ECUs or sensors connected a bus 5 branch.
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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![2018 - 2020 MY Sienna [11/2017 - ]; NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING](/t3Portal/stylegraphics/info.gif)
- Before measuring the resistance of the CAN bus, turn the engine 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 OPEN IN CAN BUS WIRE (NO. 2 CAN JUNCTION CONNECTOR) |
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the D205 and D206 No. 2 CAN junction connectors.
|
*1 |
No. 2 CAN Junction Connector |
- |
- |
|
*a |
Rear view of wire harness connector (to No. 3 CAN Junction Connector) |
- |
- |
Wiring Color:
|
Code |
Color (CANH Side) |
Color (CANL Side) |
Connected to |
|---|---|---|---|
|
D205 |
B |
W |
No. 3 CAN junction connector |
|
D206 |
V |
W |
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 |
|---|---|---|---|
|
D205-1 (CANH) - D205-2 (CANL) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
No. 3 CAN junction connector |
|
D206-1 (CANH) - D206-2 (CANL) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
Central gateway ECU (network gateway ECU) |
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (Central gateway ECU (network gateway ECU) CAN main wire) |
B |
|
NG (No. 3 CAN junction connector CAN main wire) |
C |
| A |
|
REPLACE NO. 2 CAN JUNCTION CONNECTOR |
| C |
|
|
|
2. |
CHECK FOR OPEN IN CAN BUS WIRE (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
(a) Reconnect the D205 and D206 No. 2 CAN junction connectors.
|
(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 |
|---|---|---|
|
D202-15 (CA5H) - D202-16 (CA5L) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN MAIN BUS WIRE OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 2 CAN JUNCTION CONNECTOR) |
|
3. |
CHECK FOR OPEN IN CAN BUS WIRE (NO. 3 CAN JUNCTION CONNECTOR) |
(a) Reconnect the D205 and D206 No. 2 CAN junction connectors.
(b) Disconnect the K46 and K47 No. 3 CAN junction connectors.
|
*1 |
No. 3 CAN Junction Terminal |
- |
- |
|
*a |
Rear view of wire harness connector (to No. 2 CAN Junction Connector) |
- |
- |
Wiring Color:
|
Code |
Color (CANH Side) |
Color (CANL Side) |
Connected to |
|---|---|---|---|
|
K46 |
B |
W |
No. 2 CAN junction connector |
|
K47 |
L |
W |
No. 2 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 |
|---|---|---|---|
|
K46-1 (CANH) - K46-2 (CANL) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
No. 2 CAN junction connector |
|
K47-1 (CANH) - K47-2 (CANL) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
No. 2 CAN junction terminal |
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (No. 2 CAN junction connector CAN main wire) |
B |
|
NG (No. 2 CAN junction terminal CAN main wire) |
C |
| A |
|
REPLACE NO. 3 CAN JUNCTION CONNECTOR |
| B |
|
REPAIR OR REPLACE CAN MAIN BUS WIRE OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - NO. 3 CAN JUNCTION CONNECTOR) |
|
|
4. |
CHECK FOR OPEN IN CAN BUS WIRE (NO. 2 CAN JUNCTION TERMINAL) |
(a) Reconnect the K46 and K47 No. 3 CAN junction connectors.
(b) Disconnect the No. 2 CAN junction terminal connector.
|
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| OK |
|
REPLACE NO. 2 CAN JUNCTION TERMINAL |
| NG |
|
REPAIR OR REPLACE CAN MAIN BUS WIRE OR CONNECTOR (NO. 2 CAN JUNCTION TERMINAL - NO. 3 CAN JUNCTION CONNECTOR) |
|
|