- CAN main wire and connector
- No. 1 junction connector
- No. 2 junction connector
- ECM
- Combination meter assembly
- DLC3 branch wire or connector
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000Z14R |
| Model Year Start: 2017 | Model: Sienna | Prod Date Range: [08/2016 - 11/2017] |
| Title: NETWORKING: CAN COMMUNICATION SYSTEM: Open in CAN Main Bus Line; 2017 MY Sienna [08/2016 - 11/2017] | ||
|
Open in CAN Main Bus Line |
DESCRIPTION
There may be an open circuit in the CAN main wire and/or DLC3 branch wire when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is 70 Ω or higher.
|
Symptom |
Trouble Area |
|---|---|
|
Resistance between terminals 6 (CANH) and 14 (CANL) of DLC3 is 70 Ω or higher. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Turn the ignition switch off before measuring the resistances between CAN bus main wires and between CAN bus branch wires.
- Turn the ignition switch off before inspecting CAN bus wires for a ground short.
- After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not operating.
- Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors. If any doors need to be opened in order to check connectors, open the doors and leave them open.
HINT:
- Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
- 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. |
PRECAUTION |
NOTICE:
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work (See page
![2017 - 2020 MY Sienna [08/2016 - ]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION](/t3Portal/stylegraphics/info.gif)
).
|
|
2. |
DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL |
(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and the branch wire.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected (See page
).
|
|
3. |
CHECK DLC3 |
(a) Disconnect the No. 1 junction connector connector.
|
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DLC3 (CAN-H, CAN-L) |
|
|
4. |
CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 JUNCTION CONNECTOR - ECM) |
|
*a |
Rear view of wire harness connector (to No. 1 Junction Connector) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D180-7 (CANH) - D180-18 (CANL) |
Ignition switch off |
108 to 132 Ω |
| NG |
|
|
|
5. |
CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY) |
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| OK |
|
REPLACE NO. 1 JUNCTION CONNECTOR |
| NG |
|
|
6. |
CONNECT CONNECTOR |
(a) Reconnect the D180 No. 1 junction connector connector.
|
|
7. |
CHECK FOR OPEN IN CAN BUS MAIN WIRE (ECM - NO. 1 JUNCTION CONNECTOR) |
|
(a) Disconnect the ECM connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
A69-13 (CANH) - A69-26 (CANL) |
Ignition switch off |
108 to 132 Ω |
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (ECM - NO. 1 JUNCTION CONNECTOR) |
|
8. |
CONNECT CONNECTOR |
(a) Reconnect the D180 No. 1 junction connector connector.
|
|
9. |
CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 2 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY) |
|
(a) Disconnect the No. 2 junction connector connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D179-7 (CANH) - D179-18 (CANL) |
Ignition switch off |
108 to 132 Ω |
| NG |
|
|
|
10. |
CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR) |
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| OK |
|
REPLACE NO. 2 JUNCTION CONNECTOR |
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 1 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR) |
|
11. |
CONNECT CONNECTOR |
(a) Reconnect the D179 No. 2 junction connector connector.
|
|
12. |
CHECK FOR OPEN IN CAN BUS MAIN WIRE (COMBINATION METER ASSEMBLY - NO. 2 JUNCTION CONNECTOR) |
|
(a) Disconnect the combination meter assembly connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D145-17 (CANH) - D145-16 (CANL) |
Ignition switch off |
108 to 132 Ω |
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO COMBINATION METER ASSEMBLY (COMBINATION METER ASSEMBLY - NO. 2 JUNCTION CONNECTOR) |
|
|