- Short to GND in bus 5 CAN main wires
- Short to GND in bus 5 CAN branch wires
- Central gateway ECU (network gateway ECU)
- Driving support ECU assembly*1
- Millimeter wave radar sensor assembly*1
- Clearance warning ECU assembly*2
- Parking assist ECU*3
- Forward recognition camera*1
- Rear television camera assembly*3
- Blind Spot Monitor Sensor RH*4
- 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: RM100000001DJC4 |
| Model Year Start: 2019 | Model: Sienna | Prod Date Range: [08/2018 - ] |
| Title: NETWORKING: CAN COMMUNICATION SYSTEM: Check Bus 5 Line for Short to GND; 2019 - 2020 MY Sienna [08/2018 - ] | ||
|
Check Bus 5 Line for Short to GND |
DESCRIPTION
There may be a short circuit between one of the CAN bus wires and GND when no resistance exists between terminal 15 (CA5H) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) of the DLC3, or terminal 16 (CA5L) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) of the DLC3.
|
Detection Item |
Trouble Area |
|---|---|
|
No resistance exists between terminal 15 (CA5H) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) of the DLC3, or terminal 16 (CA5L) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) of the DLC3. |
|
- *1: w/ Toyota Safety Sense P
- *3: w/ Intuitive Parking Assist System
- *3: w/ Panoramic View Monitor System
- *4: w/ Blind Spot Monitor System
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 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 engine 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 SHORT TO GND IN CAN BUS WIRE (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 3 CAN JUNCTION CONNECTOR) |
|
(a) Disconnect the cable from the negative (-) battery terminal. |
|
(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) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
D202-21 (CA3L) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
| OK |
|
|
|
2. |
CONNECT CONNECTOR |
(a) Reconnect the D202 central gateway ECU (network gateway ECU) connector.
|
|
3. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 CAN JUNCTION TERMINAL - NO. 3 CAN JUNCTION CONNECTOR) |
|
(a) Disconnect the No. 2 CAN junction terminal connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
K45-3 (CANH) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
K45-2 (CANL) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
| OK |
|
REPLACE NO. 2 CAN JUNCTION TERMINAL |
|
|
4. |
CONNECT CONNECTOR |
(a) Reconnect the K45 No. 2 CAN junction terminal connector.
|
|
5. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 CAN JUNCTION CONNECTOR) |
(a) Disconnect the No. 2 CAN junction connector.
|
*1 |
DLC3 |
- |
- |
|
*a |
Front view of wire harness connector (to No. 2 CAN Junction Connector) |
*b |
to No. 3 CAN junction connector |
|
*c |
to Central Gateway ECU (Network Gateway ECU) |
*d |
to Millimeter Wave Radar Sensor Assembly (w/ Toyota Safety Sense P) |
|
*e |
to Forward Recognition Camera (w/ Toyota Safety Sense P) |
*f |
to Blind Spot Monitor Sensor RH (w/ Blind Spot Monitor System) |
|
*g |
to Clearance Warning ECU Assembly (w/ Intuitive Parking Assist System) |
*h |
to Parking Assist ECU (w/ Panoramic View Monitor System) |
|
*i |
to Driving Support ECU Assembly (w/ Toyota Safety Sense P) |
- |
- |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
Connect to |
|---|---|---|---|
|
D217-1 (CANH) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
No. 3 CAN junction connector |
|
D217-11 (CANL) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
|
D217-2 (CANH) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Central gateway ECU (network gateway ECU) |
|
D217-12 (CANL) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
|
D217-3 (CANH) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Millimeter wave radar sensor assembly*1 |
|
D217-13 (CANL) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
|
D217-4 (CANH) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Forward recognition camera*1 |
|
D217-14 (CANL) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
|
D217-5 (CANH) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Blind spot monitor sensor RH*2 |
|
D217-15 (CANL) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
|
D217-6 (CANH) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Clearance warning ECU assembly*3 |
|
D217-16 (CANL) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
|
D217-7 (CANH) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Parking assist ECU*4 |
|
D217-17 (CANL) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
|
D217-8 (CANH) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Driving support ECU assembly*1 |
|
D217-18 (CANL) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
- *1: w/ Toyota Safety Sense P
- *2: w/ Blind Spot Monitor System
- *3: w/ Intuitive Parking Assist System
- *4: w/ Panoramic View Monitor System
Result
|
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 |
|
NG (ECU or sensor CAN branch wires) |
D |
| A |
|
REPLACE NO. 2 CAN JUNCTION CONNECTOR |
| B |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
| D |
|
|
|
6. |
CONNECT CONNECTOR |
(a) Reconnect the No. 2 CAN junction connector.
|
|
7. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 3 CAN JUNCTION CONNECTOR) |
(a) Disconnect the No. 3 CAN junction connectors.
|
*1 |
No. 3 CAN Junction Connector |
*2 |
DLC3 |
|
*a |
Rear view of wire harness connector (to No. 2 CAN Junction Connector) |
- |
- |
|
Code |
Color (CANH Side) |
Color (CANL Side) |
Connect to |
|---|---|---|---|
|
K46 |
B |
W |
No. 2 CAN Junction Connector |
|
K47 |
L |
W |
No. 2 CAN Junction Terminal |
|
K48 |
P |
W |
Rear Television Camera Assembly* |
- *: w/ Panoramic View Monitor System
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
Connect to |
|---|---|---|---|
|
K46-1 (CANH) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
No. 2 CAN junction connector |
|
K46-2 (CANL) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
|
K47-1 (CANH) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
No. 2 CAN junction terminal |
|
K47-2 (CANL) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
|
K48-1 (CANH) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Rear television camera assembly* |
|
K48-2 (CANL) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
- *: w/ Panoramic View Monitor System
Result
|
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 |
|
NG (ECU or sensor CAN branch wires) |
D |
| A |
|
REPLACE NO. 3 CAN JUNCTION CONNECTOR |
| B |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - NO. 2 CAN JUNCTION CONNECTOR) |
| C |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - NO. 2 CAN JUNCTION TERMINAL) |
|
|
8. |
CHECK FOR SHORT TO GND IN CAN BUS WIRE (ECU, SENSOR) |
|
(a) Reconnect the CAN junction connector. |
|
(b) Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the bus line shorted to GND is connected.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D202-15 (CA5H) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
D202-16 (CA5L) - D16-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
HINT:
If the resistance changes to 200 Ω or higher when the connector is disconnected from the ECU or sensor, there may be a short in the ECU or sensor.
| OK |
|
REPLACE CORRESPONDING ECU OR SENSOR |
| NG |
|
REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR CAN BRANCH WIRES OR CONNECTOR |
|
|