DTC U0235: Lost Communication with Cruise Control Front Distance Range Sensor: Procedure

1. Select "CAN Bus Check" from the "System Selection Menu" screen on the Techstream.
2. Select "Communication Malfunction DTC" from the "CAN Bus Check" screen, and then select "Enter".

   OK

   Communication system is normal.

NG → See step   7 

OK: Go to next step 

1. Disconnect the millimeter wave radar sensor assembly connector.
   Fig 1: View Of Wire Harness Connector To Millimeter Wave Radar Sensor Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the power switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A2-5 (IGB) - Body ground	Power switch on (IG)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

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

4. Reconnect the millimeter wave radar sensor assembly connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - IG1 NO. 1 RELAY) 

OK: Go to next step 

1. Disconnect the millimeter wave radar sensor assembly connector.
   Fig 2: View Of Wire Harness Connector To Millimeter Wave Radar Sensor Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   A2-2 (SGND) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

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

3. Reconnect the millimeter wave radar sensor assembly connector.

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

OK: Go to next step 

1. Replace the millimeter wave radar sensor assembly. Refer to REMOVAL .
2. Adjust the millimeter wave radar sensor assembly. Refer to ADJUSTMENT .

NEXT: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Clear the DTCs. Refer to DTC CHECK / CLEAR .
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 cruise control main switch on.
   3. Push the -SET switch to activate the cruise control.
5. Enter the following menus: Powertrain / Radar Cruise / Trouble Codes.
6. Read the DTCs.

   Result

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

B → See step   6 

A → END