DTC U1119: Lost Communication with Object Recognition ECU (CAN): Procedure

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 U1119 is output	A
   DTC other than U1119 is output	B

B → See step   9 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Pre-Collision 2/ Data List / Recog ECU H Temp Hist.
5. Confirm the judgment history.
   PRE-COLLISION 2
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Recog ECU H Temp Hist	Lane-recognition ECU temperature condition history/ ON or OFF	ON: No history of excessive temperature OFF: History of excessive temperature	-

   Result

   Result	Proceed to
   ON is displayed	A
   OFF is displayed	B

B → See step   6 

A: Go to next step 

1. Disconnect the driving support ECU connector and lane recognition camera sensor connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Condition	Condition	Specified Condition
   U4-5 (HITP) - L60-24 (HITP)	Always	Below 1 Ω
   U4-5 (HITP) or L60-24 (HITP) - Body ground	Always	10 kΩ or higher

3. Reconnect the connectors.

NG → See step   4 

OK → See step   11 

1. Repair or replace harness or connector.

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 U1119 is not output	A
   DTC U1119 is output	B

B → See step   9 

A → END 

1. Check CAN communication system. Refer to HOW TO PROCEED WITH TROUBLESHOOTING .

NG → See step   9 

OK: Go to next step 

1. Replace the lane recognition camera sensor assembly. Refer to REMOVAL .
2. Adjust the lane recognition camera sensor. 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 of 40 km/h (25 mph) or more.
   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 U1119 is not output	A
   DTC U1119 is output	B

B → See step   10 

A → END