DTC U0235: Lost Communication with Cruise Control Front Distance Range Sensor [12/2013 - 11/2016]: Procedure

1. Using the Techstream, check if the CAN communication system is functioning normally.

   Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2013 - 11/2016]

   Result

   Result	Proceed to
   CAN communication is normal	A
   CAN communication is malfunctioning	B

Result:  2

B 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2013 - 11/2016] 

Result:  1

A 

See step  2

1. Disconnect the A3 millimeter wave radar sensor assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Millimeter Wave Radar Sensor Assembly)

2. Turn the engine switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A3-5 (IGB) - Body ground	Engine switch on (IG)	11 to 14 V

4. Turn the engine switch off.
5. Reconnect the A3 millimeter wave radar sensor assembly connector.

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  1

OK 

See step  3

1. Disconnect the A3 millimeter wave radar sensor assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   A3-1 (SGND) - Body ground	Always	Below 1 Ω

3. Reconnect the A3 millimeter wave radar sensor assembly connector.

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - BODY GROUND) 

Result:  1

OK 

See step  4

1. Disconnect the F84 driving support ECU assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Driving Support ECU Assembly)

2. Turn the engine switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   F84-30 (B) - Body ground	Engine switch on (IG)	11 to 14 V

4. Turn the engine switch off.
5. Reconnect the F84 driving support ECU assembly connector.

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPAIR OR REPLACE POWER SOURCE CIRCUIT 

Result:  1

OK 

See step  5

1. Replace the millimeter wave radar sensor assembly.

   Refer to REMOVAL [12/2013 - 11/2016]

Result: 

NEXT 

1. Adjust the millimeter wave radar sensor assembly.

   Refer to ADJUSTMENT [12/2013 - 11/2016]

Result: 

NEXT 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [12/2013 - 11/2016]

4. Perform the following to make sure that the DTC detection conditions are met.

   HINT: 

   If the detection conditions are not met, the malfunction cannot be detected.

   1. Drive the vehicle at a speed for which cruise control operation is possible.
   2. Turn the dynamic radar cruise control system on using the cruise control main switch (ON-OFF button).
   3. Push the cruise control main switch to -SET to activate the dynamic radar cruise control system.
5. Enter the following menus: Powertrain / Radar Cruise / Trouble Codes.
6. Check for DTCs.

   Powertrain > Radar Cruise > Trouble Codes 

   Result

   Result	Proceed to
   DTCs are not output	A
   DTC U0235 is output	B

7. Turn the engine switch off.

Result:  1

A 

END 

Result:  2

B 

REPLACE DRIVING SUPPORT ECU ASSEMBLY. Refer to  COMPONENTS [12/2013 - ]