- Short to GND
- ECM
- Airbag sensor assembly
- Power management control ECU*1
- Certification ECU (smart key ECU assembly)*1
- Air conditioning amplifier assembly*2
- Network gateway ECU*2
- Main body ECU (multiplex network body ECU)
- Combination meter assembly
- 4WD ECU assembly*3*2
- Yaw rate sensor*4
- Brake actuator assembly (skid control ECU)
- Steering angle sensor
- Steering column assembly (power steering ECU)
- Radio and display receiver assembly*5
- Navigation receiver assembly*6
- No. 1 junction connector
- No. 2 junction connector
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000Z14X |
| Model Year Start: 2017 | Model: Sienna | Prod Date Range: [08/2016 - 11/2017] |
| Title: NETWORKING: CAN COMMUNICATION SYSTEM: Check CAN Bus Line for Short to GND; 2017 MY Sienna [08/2016 - 11/2017] | ||
|
Check CAN Bus Line for Short to GND |
DESCRIPTION
There may be a short circuit between the CAN bus line and GND when there is resistance between terminals 6 (CANH) and 4 (CG) or terminals 14 (CANL) and 4 (CG) of the DLC3.
|
Symptom |
Trouble Area |
|---|---|
|
There is resistance between terminals 6 (CANH) and 4 (CG) or terminals 14 (CANL) and 4 (CG) of the DLC3. |
|
- *1: w/ Smart Key System
- *2: w/o Smart Key System
- *3: for AWD
- *4: w/ VDIM
- *5: for Radio and Display Type
- *6: for Navigation Receiver Type
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 FOR SHORT TO GND IN CAN BUS WIRE (DLC3 BRANCH WIRE) |
|
(a) Disconnect the D180 No. 1 junction connector connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D16-6 (CANH) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
D16-14 (CANL) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DLC3 (CAN-H, CAN-L) |
|
|
4. |
CONNECT CONNECTOR |
(a) Reconnect the D180 No. 1 junction connector connector.
|
|
5. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR SIDE) |
|
(a) Disconnect the D179 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 |
|---|---|---|
|
D16-6 (CANH) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
D16-14 (CANL) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
| NG |
|
|
|
6. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)) |
HINT:
For vehicle without smart key system, go to step 7.
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG |
|
|
|
7. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY) |
HINT:
For vehicle with smart key system, go to step 8.
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG |
|
|
|
8. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)) |
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG |
|
|
|
9. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - RADIO AND DISPLAY RECEIVER ASSEMBLY) |
HINT:
Except radio and display type, go to step 10.
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG |
|
|
|
10. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - NAVIGATION RECEIVER ASSEMBLY) |
HINT:
Except navigation receiver type, go to step 11.
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG |
|
|
|
11. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - POWER MANAGEMENT CONTROL ECU) |
HINT:
For vehicle without smart key system, go to step 12.
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG |
|
|
|
12. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - NETWORK GATEWAY ECU) |
HINT:
For vehicle with smart key system, go to step 13.
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG |
|
|
|
13. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY) |
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| OK |
|
REPAIR OR REPLACE NO. 2 JUNCTION CONNECTOR |
| NG |
|
|
14. |
CONNECT CONNECTOR |
(a) Reconnect the D179 No. 2 junction connector connector.
|
|
15. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR) |
|
(a) Disconnect the No. 1 junction connector connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D180-1 (CANH) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
D180-12 (CANL) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 1 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR) |
|
|
16. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - STEERING ANGLE SENSOR) |
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG |
|
|
|
17. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - STEERING COLUMN ASSEMBLY (POWER STEERING ECU)) |
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG |
|
|
|
18. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) |
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG |
|
|
|
19. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - YAW RATE SENSOR) |
HINT:
For vehicle without VDIM, go to step 20.
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG |
|
|
|
20. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - AIRBAG SENSOR ASSEMBLY) |
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG |
|
|
|
21. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - 4WD ECU ASSEMBLY) |
HINT:
Except AWD with smart key system, go to step 22.
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG |
|
|
|
22. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - ECM) |
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| OK |
|
REPAIR OR REPLACE NO. 1 JUNCTION CONNECTOR |
| NG |
|
|
23. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)) |
|
(a) Disconnect the D88 certification ECU (smart key ECU assembly) connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D179-3 (CANH) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
D179-14 (CANL) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (CAN-H, CAN-L) |
|
24. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (AIR CONDITIONING AMPLIFIER ASSEMBLY) |
|
*a |
Rear view of wire harness connector (to No. 2 Junction Connector) |
|
*b |
Front view of DLC3 |
(a) Disconnect the D75 air conditioning amplifier assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D179-2 (CANH) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
D179-13 (CANL) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO AIR CONDITIONING AMPLIFIER ASSEMBLY (CAN-H, CAN-L) |
|
25. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)) |
|
(a) Disconnect the A4 brake actuator assembly (skid control ECU) connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D179-1 (CANH) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
D179-12 (CANL) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) (CAN-H, CAN-L) |
|
26. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (RADIO AND DISPLAY RECEIVER ASSEMBLY) |
|
*a |
Rear view of wire harness connector (to No. 2 Junction Connector) |
|
*b |
Front view of DLC3 |
(a) Disconnect the D155 radio and display receiver assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D179-6 (CANH) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
D179-17 (CANL) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO RADIO AND DISPLAY RECEIVER ASSEMBLY (CAN-H, CAN-L) |
|
27. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NAVIGATION RECEIVER ASSEMBLY) |
|
(a) Disconnect the D153 navigation receiver assembly connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D179-6 (CANH) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
D179-17 (CANL) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO NAVIGATION RECEIVER ASSEMBLY (CAN-H, CAN-L) |
|
28. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (POWER MANAGEMENT CONTROL ECU) |
|
(a) Disconnect the D89 power management control ECU connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D179-5 (CANH) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
D179-16 (CANL) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO POWER MANAGEMENT CONTROL ECU (CAN-H, CAN-L) |
|
29. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NETWORK GATEWAY ECU) |
|
(a) Disconnect the D90 network gateway ECU connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D179-5 (CANH) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
D179-16 (CANL) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO NETWORK GATEWAY ECU (CAN-H, CAN-L) |
|
30. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (COMBINATION METER ASSEMBLY) |
|
(a) Disconnect the D18 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 |
|---|---|---|
|
D179-7 (CANH) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
D179-18 (CANL) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO COMBINATION METER ASSEMBLY (CAN-H, CAN-L) |
|
31. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (STEERING ANGLE SENSOR) |
(a) Disconnect the D22 steering angle sensor connector.
|
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO STEERING ANGLE SENSOR (CAN-H, CAN-L) |
|
32. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (STEERING COLUMN ASSEMBLY (POWER STEERING ECU)) |
|
(a) Disconnect the D35 steering column assembly (power steering ECU) connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D180-3 (CANH) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
D180-14 (CANL) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO STEERING COLUMN ASSEMBLY (POWER STEERING ECU) (CAN-H, CAN-L) |
|
33. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) |
|
(a) Disconnect the D13 main body ECU (multiplex network body ECU) connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D180-4 (CANH) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
D180-15 (CANL) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (CAN-H, CAN-L) |
|
34. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (YAW RATE SENSOR) |
|
(a) Disconnect the L6 yaw rate sensor connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D180-8 (CANH) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
D180-19 (CANL) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO YAW RATE SENSOR (CAN-H, CAN-L) |
|
35. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (AIRBAG SENSOR ASSEMBLY) |
|
(a) Disconnect the D150 airbag sensor assembly connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D180-9 (CANH) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
D180-20 (CANL) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO AIRBAG SENSOR ASSEMBLY (CAN-H, CAN-L) |
|
36. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (4WD ECU ASSEMBLY) |
|
(a) Disconnect the K1 4WD ECU assembly connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D180-5 (CANH) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
D180-16 (CANL) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO 4WD ECU ASSEMBLY (CAN-H, CAN-L) |
|
37. |
CHECK CAN BUS LINE FOR DISCONNECTION (ECM MAIN WIRE) |
|
(a) Disconnect the A39 ECM connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D180-7 (CANH) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
D180-18 (CANL) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (CAN-H, CAN-L) |
|
|