DTC C1A52: Driving Support ECU Communication Abnormal [08/2015 - ]: Procedure

CHECK FOR DTC (PRE-COLLISION 2)
1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Clear the DTCs. Refer to DTC CHECK / CLEAR [08/2015 - ] .
4. Make sure that the DTC detection conditions are met.
  HINT:
  
  If the detection conditions are not met, the system cannot detect the malfunction.
5. Enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes.
6. Check for DTCs.
  OK
  
  DTC C1A52 is not output
NG → See step 2

OK → See step 4
REPLACE ECM
1. Replace the ECM with a new one. Refer to REMOVAL [08/2015 - ] for 2GR-FE. Refer to REMOVAL [08/2015 - ] 2AR-FE).
NEXT: Go to next step
CHECK FOR DTC (PRE-COLLISION 2)
1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Clear the DTCs. Refer to DTC CHECK / CLEAR [08/2015 - ] .
4. Make sure that the DTC detection conditions are met.
  HINT:
  
  If the detection conditions are not met, the system cannot detect the malfunction.
5. Enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes.
6. Check for DTCs.
  OK
  
  DTC C1A52 is not output
NG → See step 5

OK → END (ECM WAS DEFECTIVE)
USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - ]
REPLACE DRIVING SUPPORT ECU ASSEMBLY. Refer to REMOVAL [08/2015 - ]