| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM1000000018K3W |
| Model Year Start: 2018 | Model: Sienna | Prod Date Range: [11/2017 - ] |
| Title: CRUISE CONTROL: LANE DEPARTURE ALERT SYSTEM(w/ Steering Control): U0235,U1104; Lost Communication with Cruise Control Front Distance Range Sensor; 2018 - 2020 MY Sienna [11/2017 - ] | ||
|
DTC |
U0235 |
Lost Communication with Cruise Control Front Distance Range Sensor |
|
DTC |
U1104 |
Lost Communication with Driving Support ECU |
DESCRIPTION
The forward recognition camera communicates with the driving support ECU assembly and millimeter wave radar sensor assembly via CAN communication. If there is a communication error with the driving support ECU assembly or millimeter wave radar sensor assembly, the forward recognition camera stores DTC U0235 or U1104.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
U0235 |
Lost Communication with Cruise Control Front Distance Range Sensor |
2 seconds after the ignition switch is turned to ON, a communication error between the millimeter wave radar sensor assembly and the forward recognition camera is detected for approximately 5 seconds. |
|
|
U1104 |
Lost Communication with Driving Support ECU |
2 seconds after the ignition switch is turned to ON, a communication error between the driving support ECU assembly and the forward recognition camera is detected for approximately 5 seconds. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following inspection procedure.
- When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.
- When replacing the millimeter wave radar sensor assembly, always replace it with a new one. If a millimeter wave radar sensor assembly which was installed to another vehicle is used, the information stored in the millimeter wave radar sensor assembly will not match the information from the vehicle. As a result, a DTC may be stored.
-
When the millimeter wave radar sensor assembly is replaced with a new one, adjustment of the radar sensor beam axis must be performed.
Click here
![2018 - 2020 MY Sienna [11/2017 - ]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: ADJUSTMENT](/t3Portal/stylegraphics/info.gif)
- When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle. As a result, a DTC may be stored.
-
If the forward recognition camera has been replaced with a new one, be sure to perform forward recognition camera adjustment.
Click here
-
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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PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM (CAN BUS CHECK) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: System Select / CAN Bus Check.
Click here
|
Result |
Proceed to |
|---|---|
|
All of the ECUs and sensors that are currently connected to the CAN communication system are displayed |
A |
|
None of the ECUs and sensors that are currently connected to the CAN communication system are displayed, or some of them are not displayed |
B |
| B |
|
|
|
2. |
CHECK FOR DTCs (CAN COMMUNICATION DTC OUTPUT) |
HINT:
When pre-collision system DTC U1002 is output, check that the local bus is functioning normally by performing the diagnostic procedure for U1002.
(a) Check for DTCs.
Click here
|
Result |
Proceed to |
|---|---|
|
DTC U1002 is not output |
A |
|
DTC U1002 is output |
B |
| B |
|
|
|
3. |
CHECK CAN BUS LINE |
(a) Turn the ignition switch off.
(b) Disconnect the cable from the negative (-) battery terminal.
|
(c) Disconnect the forward recognition camera connector. |
|
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
T32-6 (CANH) - T32-12 (CANL) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
HINT:
If the result is not as specified, a malfunction in a CAN communication line is suspected.
(e) Connect the forward recognition camera connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (CAN BUS LINE) |
|
|
4. |
CHECK FOR DTCs (LANE DEPARTURE ALERT SYSTEM) |
(a) Check for DTCs.
Click here
|
Result |
Proceed to |
|---|---|
|
DTC U0235 and U1104 are output |
A |
|
Only DTC U1104 is output |
B |
|
Only DTC U0235 is output |
C |
| B |
|
| C |
|
|
|
5. |
CHECK POWER SOURCE CIRCUIT (DRIVING SUPPORT ECU ASSEMBLY) |
|
(a) Disconnect the driving support ECU assembly connector. |
|
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
A80-7 (B) - Body ground |
Ignition switch ON |
11 to 14 V |
(d) Turn the ignition switch off.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A80-28 (GND) - Body ground |
Always |
Below 1 Ω |
(f) Reconnect the driving support ECU assembly connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
|
|
6. |
CHECK POWER SOURCE CIRCUIT (MILLIMETER WAVE RADAR SENSOR ASSEMBLY) |
|
(a) Disconnect the millimeter wave radar sensor assembly connector. |
|
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
A77-8 (IGB) - Body ground |
Ignition switch ON |
11 to 14 V |
(d) Turn the ignition switch off.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A77-1 (SGND) - Body ground |
Always |
Below 1 Ω |
(f) Reconnect the millimeter wave radar sensor assembly connector.
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
|
7. |
CHECK POWER SOURCE CIRCUIT (DRIVING SUPPORT ECU ASSEMBLY) |
|
(a) Disconnect the driving support ECU assembly connector. |
|
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
A80-7 (B) - Body ground |
Ignition switch ON |
11 to 14 V |
(d) Turn the ignition switch off.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A80-28 (GND) - Body ground |
Always |
Below 1 Ω |
(f) Reconnect the driving support ECU assembly connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
|
|
8. |
REPLACE DRIVING SUPPORT ECU ASSEMBLY |
(a) Replace the driving support ECU assembly.
Click here
|
|
9. |
CHECK FOR DTCs (LANE DEPARTURE ALERT SYSTEM) |
(a) Clear the DTCs.
Click here
(b) Perform the following procedure.
HINT:
If the following procedure is not performed, the previously output DTC cannot be detected.
- Turn the ignition switch to ON and wait 7 seconds or more.
(c) Check for DTCs.
Click here
|
Result |
Proceed to |
|---|---|
|
DTC U1104 is not output |
A |
|
DTC U1104 is output |
B |
| A |
|
END (DRIVING SUPPORT ECU ASSEMBLY WAS DEFECTIVE) |
| B |
|
|
10. |
CHECK POWER SOURCE CIRCUIT (MILLIMETER WAVE RADAR SENSOR ASSEMBLY) |
|
(a) Disconnect the millimeter wave radar sensor assembly connector. |
|
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
A77-8 (IGB) - Body ground |
Ignition switch ON |
11 to 14 V |
(d) Turn the ignition switch off.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A77-1 (SGND) - Body ground |
Always |
Below 1 Ω |
(f) Reconnect the millimeter wave radar sensor assembly connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
|
|
11. |
REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY |
(a) Replace the millimeter wave radar sensor assembly.
Click here
(b) Adjust the millimeter wave radar sensor assembly.
Click here
|
|
12. |
CHECK FOR DTCs (LANE DEPARTURE ALERT SYSTEM) |
(a) Clear the DTCs.
Click here
(b) Perform the following procedure.
HINT:
If the following procedure is not performed, the previously output DTC cannot be detected.
- Turn the ignition switch to ON and wait 7 seconds or more.
(c) Check for DTCs.
Click here
|
Result |
Proceed to |
|---|---|
|
DTC U0235 is not output |
A |
|
DTC U0235 is output |
B |
| A |
|
END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE) |
| B |
|
|
|