DTC U0235: Lost Communication with Cruise Control Front Distance Range Sensor [08/2017 - 08/2019]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: System Select / CAN Bus Check.

   Refer to DIAGNOSIS SYSTEM [08/2017 - 08/2018] , or refer to DIAGNOSIS SYSTEM [08/2018 - 08/2019]

   Result

   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

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2017 - 08/2019] 

Result: 

A 

See step  2

HINT: 

When pre-collision system DTC U1002 is output, check that the local bus is functioning normally by performing the diagnostic procedure for U1002.

1. Check for DTCs.

   Refer to DTC CHECK / CLEAR [08/2017 - 08/2019]

   Result

   Result	Proceed to
   DTC U1002 is not output	A
   DTC U1002 is output	B

Result: 

B 

GO TO PRE-COLLISION SYSTEM. Refer to  DTC U1002: Lost Communication with Gateway Module [08/2017 - 08/2019] 

Result: 

A 

See step  3

1. Turn the ignition switch off.
2. Disconnect the cable from the negative (-) battery terminal.
3. Disconnect the forward recognition camera connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Forward Recognition Camera)

4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   U22-6 (CANH) - U22-12 (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.

5. Connect the forward recognition camera connector.
6. Connect the cable to the negative (-) battery terminal.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (CAN BUS LINE) 

Result: 

OK 

See step  4

1. Disconnect the forward recognition camera connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Forward Recognition Camera)

2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   U22-7 (IGB) - Body ground	Ignition switch ON	11 to 14 V

3. Connect the forward recognition camera connector.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

Result: 

OK 

See step  5

1. Disconnect the forward recognition camera connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Forward Recognition Camera)

2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   U22-10 (GND) - Body ground	Always	Below 1 Ω

3. Connect the forward recognition camera connector.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

1. Disconnect the 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. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A66-8 (IGB) - Body ground	Ignition switch ON	11 to 14 V

3. Connect the millimeter wave radar sensor assembly connector.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

Result: 

OK 

See step  7

1. Disconnect the 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. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A66-1 (SGND) - Body ground	Always	Below 1 Ω

3. Connect the millimeter wave radar sensor assembly connector.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  8

1. Replace the millimeter wave radar sensor assembly.

   Refer to REMOVAL [08/2017 - ]

2. Adjust the millimeter wave radar sensor assembly.

   Refer to ADJUSTMENT [08/2017 - 08/2018] , or refer to ADJUSTMENT [08/2018 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  9

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [08/2017 - 08/2019]

2. Make sure that the DTC detection conditions are met.

   HINT: 

   If the conditions are not met, the system cannot detect the malfunction.

3. Check for DTCs.

   Refer to DTC CHECK / CLEAR [08/2017 - 08/2019]

   Result

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

Result: 

A 

END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE) 

Result: 

B 

See step  10

1. Replace the forward recognition camera.

   Refer to REMOVAL [08/2017 - ]

2. Perform forward recognition camera axis adjustment.

   Refer to ADJUSTMENT (SEQUENTIAL RECOGNITION) [08/2017 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

END