Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM1000000018K2R
Model Year Start: 2018 Model: Sienna Prod Date Range: [11/2017 -           ]
Title: CRUISE CONTROL: FORWARD RECOGNITION CAMERA SYSTEM: 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.

  • CAN communication system
  • Millimeter wave radar sensor assembly
  • Forward recognition camera

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.

  • CAN communication system
  • Driving support ECU assembly
  • Forward recognition camera

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

  • 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 2018 - 2020 MY Sienna [11/2017 -        ]; CRUISE CONTROL: FRONT CAMERA: ADJUSTMENT (SEQUENTIAL RECOGNITION)

  • 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 2017 - 2020 MY Sienna [08/2016 -        ]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION

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 2018 MY Sienna [11/2017 - 08/2018]; NETWORKING: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM 2019 - 2020 MY Sienna [08/2018 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM

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

GO TO CAN COMMUNICATION SYSTEM

A

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 2018 - 2020 MY Sienna [11/2017 -        ]; PRE-COLLISION: PRE-COLLISION SYSTEM: DTC CHECK / CLEAR

Result

Proceed to

DTC U1002 is not output

A

DTC U1002 is output

B

B

GO TO PRE-COLLISION SYSTEM

A

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.

*a

Front view of wire harness connector

(to Forward Recognition Camera)

(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)

OK

4.

CHECK FOR DTCs (FORWARD RECOGNITION CAMERA SYSTEM)

(a) Check for DTCs.

Click here 2018 - 2020 MY Sienna [11/2017 -        ]; CRUISE CONTROL: FORWARD RECOGNITION CAMERA SYSTEM: DTC CHECK / CLEAR

Result

Proceed to

DTC U0235 and U1104 are output

A

Only DTC U1104 is output

B

Only DTC U0235 is output

C

B

GO TO STEP 7

C

GO TO STEP 10

A

5.

CHECK POWER SOURCE CIRCUIT (DRIVING SUPPORT ECU ASSEMBLY)

(a) Disconnect the driving support ECU assembly connector.

*a

Front view of wire harness connector

(to Driving Support ECU Assembly)

(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)

OK

6.

CHECK POWER SOURCE CIRCUIT (MILLIMETER WAVE RADAR SENSOR ASSEMBLY)

(a) Disconnect the millimeter wave radar sensor assembly connector.

*a

Front view of wire harness connector

(to Millimeter Wave Radar Sensor Assembly)

(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

REPLACE FORWARD RECOGNITION CAMERA

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.

*a

Front view of wire harness connector

(to Driving Support ECU Assembly)

(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)

OK

8.

REPLACE DRIVING SUPPORT ECU ASSEMBLY

(a) Replace the driving support ECU assembly.

Click here 2018 - 2020 MY Sienna [11/2017 -        ]; CRUISE CONTROL: DRIVING SUPPORT ECU: REMOVAL

NEXT

9.

CHECK FOR DTCs (FORWARD RECOGNITION CAMERA SYSTEM)

(a) Clear the DTCs.

Click here 2018 - 2020 MY Sienna [11/2017 -        ]; CRUISE CONTROL: FORWARD RECOGNITION CAMERA SYSTEM: DTC CHECK / CLEAR

(b) Perform the following procedure.

HINT:

If the following procedure is not performed, the previously output DTC cannot be detected.

  1. Turn the ignition switch to ON and wait 7 seconds or more.

(c) Check for DTCs.

Click here 2018 - 2020 MY Sienna [11/2017 -        ]; CRUISE CONTROL: FORWARD RECOGNITION CAMERA SYSTEM: DTC CHECK / CLEAR

Result

Proceed to

DTC U1104 is not output

A

DTC U1104 is output

B

A

END (DRIVING SUPPORT ECU ASSEMBLY WAS DEFECTIVE)

B

REPLACE FORWARD RECOGNITION CAMERA

10.

CHECK POWER SOURCE CIRCUIT (MILLIMETER WAVE RADAR SENSOR ASSEMBLY)

(a) Disconnect the millimeter wave radar sensor assembly connector.

*a

Front view of wire harness connector

(to Millimeter Wave Radar Sensor Assembly)

(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)

OK

11.

REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

(a) Replace the millimeter wave radar sensor assembly.

Click here 2018 - 2020 MY Sienna [11/2017 -        ]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: REMOVAL

(b) Adjust the millimeter wave radar sensor assembly.

Click here 2018 - 2020 MY Sienna [11/2017 -        ]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: ADJUSTMENT

NEXT

12.

CHECK FOR DTCs (FORWARD RECOGNITION CAMERA SYSTEM)

(a) Clear the DTCs.

Click here 2018 - 2020 MY Sienna [11/2017 -        ]; CRUISE CONTROL: FORWARD RECOGNITION CAMERA SYSTEM: DTC CHECK / CLEAR

(b) Perform the following procedure.

HINT:

If the following procedure is not performed, the previously output DTC cannot be detected.

  1. Turn the ignition switch to ON and wait 7 seconds or more.

(c) Check for DTCs.

Click here 2018 - 2020 MY Sienna [11/2017 -        ]; CRUISE CONTROL: FORWARD RECOGNITION CAMERA SYSTEM: DTC CHECK / CLEAR

Result

Proceed to

DTC U0235 is not output

A

DTC U0235 is output

B

A

END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE)

B

REPLACE FORWARD RECOGNITION CAMERA