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"Panoramic View Monitor" is indicated on the "Bus Check" screen (See page
![2018 MY Sienna [11/2017 - 08/2018]; NETWORKING: CAN COMMUNICATION SYSTEM: PROBLEM SYMPTOMS TABLE](/t3Portal/stylegraphics/info.gif)
)
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Communication system DTCs (DTCs that start with U) that are output correspond to "Parking Assist ECU Communication Stop Mode" in "DTC Combination Table" (See page
)
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM1000000018DN2 |
| Model Year Start: 2018 | Model: Sienna | Prod Date Range: [11/2017 - 08/2018] |
| Title: NETWORKING: CAN COMMUNICATION SYSTEM: Parking Assist ECU Communication Stop Mode; 2018 MY Sienna [11/2017 - 08/2018] | ||
|
Parking Assist ECU Communication Stop Mode |
DESCRIPTION
|
Detection Item |
Symptom |
Trouble Area |
|---|---|---|
|
Parking Assist ECU Communication Stop Mode |
Either Condition is met: |
|
HINT:
For vehicle with panoramic view monitor system only.
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 (See page
).
- 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, 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.
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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.
Click here
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Some parts must be initialized and set when replacing or removing and installing parts (See page
).
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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.
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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 (See page
).
- Inspect the fuses for circuits related to this system before performing the following procedure.
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 (PARKING ASSIST ECU CAN BRANCH WIRE) |
(a) Disconnect the cable from the negative (-) battery terminal.
|
(b) Disconnect the parking assist ECU connector. |
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D163-11 (CANH) - D163-12 (CANL) |
Cable disconnected from negative (-) battery terminal |
54 to 69 Ω |
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO PARKING ASSIST ECU |
|
|
2. |
CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - POWER SOURCE) |
|
(a) Disconnect the parking assist ECU connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D163-4 (GND1) - Body ground |
Cable disconnected from negative (-) battery terminal |
Below 1 Ω |
(c) Reconnect the cable to the negative (-) battery terminal.
NOTICE:
When connecting the cable, some systems need to be initialized after the cable is reconnected (See page
).
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D163-1 (+B) - Body ground |
Always |
11 to 14 V |
|
D163-3 (IG) - Body ground |
Ignition switch ON |
11 to 14 V |
|
D163-2 (ACC) - Body ground |
Ignition switch ACC |
11 to 14 V |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|