Toyota Avalon Service & Repair Manual: Lost Communication with Cruise Control Front Distance Range Sensor (U0235)

Toyota Avalon Service & Repair Manual / Engine / Cruise Control / Front Camera System(for Hv Model) / Lost Communication with Cruise Control Front Distance Range Sensor (U0235)

DESCRIPTION

The forward recognition camera communicates with the millimeter wave radar sensor assembly via CAN communication. If there is a communication error with the millimeter wave radar sensor assembly, the forward recognition camera stores DTC U0235.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U0235

Lost Communication with Cruise Control Front Distance Range Sensor

2 seconds after the power switch is turned on (IG), a communication error between the millimeter wave radar sensor assembly and the forward recognition camera is detected for approximately 5 seconds.

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

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • 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

  • 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

PROCEDURE

1.

READ VALUE USING TECHSTREAM (CAN BUS CHECK)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: System Select / Can Bus Check.

Click here

CAN Bus Check

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

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.

Body Electrical > Pre-Collision 2 > Trouble Codes

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 power switch off.

(b) Disconnect the cable from the negative (-) auxiliary battery terminal.

(c) Disconnect the O5 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

O5-6 (CANH) - O5-12 (CANL)

Cable disconnected from negative (-) auxiliary 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 O5 forward recognition camera connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (CAN BUS LINE)

OK

4.

CHECK FOR DTCs

(a) Check for DTCs.

Chassis > Front Recognition Camera > Trouble Codes

Result

Proceed to

Only DTC U0235 is output

A

DTC U0235 and U1104 are output

B

B

REPLACE FORWARD RECOGNITION CAMERA

A

5.

CHECK FOR DTCs

(a) Check for DTCs.

HINT:

The malfunction area can be determined by the combination of DTCs output at the same time.

Body Electrical > Pre-Collision 2 > Trouble Codes Chassis > Front Recognition Camera > Trouble Codes

Result

Proceed to

Front camera system (Front Recognition Camera) DTC U0235 and pre-collision system (Pre-Collision 2) DTC U1104 are output.

A

Front camera system (Front Recognition Camera) DTC U0235 and pre-collision system (Pre-Collision 2) DTC U0235 are output.

Only front camera system (Front Recognition Camera) DTC U0235 is output.

B

A

REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

B

REPLACE FORWARD RECOGNITION CAMERA

    Lost Communication with TCM (U0101,U0123,U0129,U0142,U0293)

    Lost Communication with Driving Support ECU (U1104)

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