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

1. Disconnect the distance control ECU connector.
2. Disconnect the millimeter wave radar sensor connector.
   Fig 1: Identifying Terminals Of Distance Control ECU And Millimeter Wave Radar Sensor Connectors

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   J17-22 (LRDD) - B9-3 (LRDD)	Always	Below 1 Ω
   J17-13 (IGB) - B9-5 (IGB)	Always	Below 1 Ω
   J17-22 (LRDD) - Body ground	Always	10 kΩ or higher
   J17-13 (IGB) - Body ground	Always	10 kΩ or higher

4. Reconnect the distance control ECU connector.
5. Reconnect the millimeter wave radar sensor connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Measure the voltage according to the value(s) in the table below.
   Fig 2: Identifying Terminals Of Distance Control ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   J17-13 (IGB) - J17-10 (SGND)	Engine switch on (IG)	11 to 14 V
   J17-22 (LRDD) - J17-10 (SGND)	Engine switch on (IG)	4.5 to 5.5 V

NG → See step   5 

OK: Go to next step 

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

NEXT: Go to next step 

1. Clear the DTCs. Refer to DTC CHECK / CLEAR .
2. Turn the cruise control main switch on.
3. Drive the vehicle at a speed for which cruise control operation is possible.
4. Check if the same DTC is recorded. Refer to DTC CHECK / CLEAR .

   Result

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

B → See step   5 

A → END