DTC C1A40: ENG / EHV Device [09/2014 - 11/2017]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Trouble Codes.
5. Check for DTCs.

   Refer to DTC CHECK / CLEAR [09/2014 - ]

   Powertrain > Engine > Trouble Codes 

   Result

   Result	Proceed to
   SFI system DTCs are not output	A
   SFI system DTCs are output	B

Result: 

B 

GO TO SFI SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2014 - 10/2015]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2015 - 08/2016]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2016 - 11/2017] 

Result: 

A 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. for A760H: Enter the following menus: Powertrain / Engine / Trouble Codes.
5. for AA81E: Enter the following menus: Powertrain / ECT / Trouble Codes.
6. Check for DTCs.

   for A760H: Refer to DTC CHECK / CLEAR [09/2014 - ]

   for AA81E: Refer to DTC CHECK / CLEAR [09/2014 - ]

   Powertrain > Engine > Trouble Codes 

   Powertrain > ECT > Trouble Codes 

   Result

   Result	Proceed to
   Automatic transmission system DTCs are not output	A
   Automatic transmission system DTCs are output	B

Result: 

B 

GO TO AUTOMATIC TRANSMISSION SYSTEM 

for A760H: Refer to DIAGNOSTIC TROUBLE CODE CHART [09/2014 - 10/2015] , or refer to DIAGNOSTIC TROUBLE CODE CHART [10/2015 - 08/2016] , or refer to DIAGNOSTIC TROUBLE CODE CHART [08/2016 - 11/2017]

for AA81E: Refer to DIAGNOSTIC TROUBLE CODE CHART [09/2014 - 10/2015] , or refer to DIAGNOSTIC TROUBLE CODE CHART [10/2015 - 08/2016] , or refer to DIAGNOSTIC TROUBLE CODE CHART [08/2016 - 11/2017]

Result: 

A 

See step  3

1. Replace the driving support ECU assembly.

   Refer to REMOVAL [09/2014 - 01/2023]

   NOTE:

   When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [09/2014 - 11/2017]

   Body Electrical > Pre-Collision 2 > Clear DTCs 

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

   HINT: 

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

3. Check for DTCs.

   Refer to DTC CHECK / CLEAR [09/2014 - 11/2017]

   Body Electrical > Pre-Collision 2 > Trouble Codes 

   Result

   Result	Proceed to
   DTC C1A40 is not output	A
   DTC C1A40 is output	B

Result: 

A 

END (DRIVING SUPPORT ECU ASSEMBLY WAS DEFECTIVE) 

Result: 

B 

REPLACE ECM. Refer to  REMOVAL [09/2014 - ]