DTC P1283-00: Cold Start Fuel Injection Control Performance #1; DTC P1284-00: Cold Start Fuel Injection Control Performance #2; DTC P1285-00: Cold Start Fuel Injection Control Performance #3; DTC P1286-00: Cold Start Fuel Injection Control Performance #4 [08/2021 - ]: 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. Read the DTCs.

   Powertrain > Engine > Trouble Codes 

   Result

   Result	Proceed to
   DTC P1283-00, P1284-00, P1285-00 and/or P1286-00 is output	A
   DTC P1283-00, P1284-00, P1285-00 and/or P1286-00 and other DTCs are output	B

   HINT: 

   If any DTCs other than P1283-00, P1284-00, P1285-00 and/or P1286-00 are output, troubleshoot those DTCs first.

Result: 

B 

GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2021 - 09/2022]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2022 - ] 

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. Enter the following menus: Powertrain / Engine / Trouble Codes.
5. Read the DTCs.

   Powertrain > Engine > Trouble Codes 

   Result

   Result	Proceed to
   Only 1 DTC among DTC P1283-00, P1284-00, P1285-00 and P1286-00 is output	A
   2 or more DTCs among DTC P1283-00, P1284-00, P1285-00 and P1286-00 are output	B

   HINT: 

   If the malfunction occurred for one cylinder or multiple cylinders can be determined based on the stored DTCs.

Result: 

B 

See step  6

Result: 

A 

See step  3

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C77-16 (#1D+) - C77-17 (#1D-)	20°C (68°F)	1.34 to 1.64 Ω
   C77-11 (#2D+) - C77-10 (#2D-)	20°C (68°F)	1.34 to 1.64 Ω
   C77-12 (#3D+) - C77-13 (#3D-)	20°C (68°F)	1.34 to 1.64 Ω
   C77-15 (#4D+) - C77-14 (#4D-)	20°C (68°F)	1.34 to 1.64 Ω
   C77-16 (#1D+) or C77-17 (#1D-) - Body ground and other terminals	Always	1 MΩ or higher
   C77-11 (#2D+) or C77-10 (#2D-) - Body ground and other terminals	Always	1 MΩ or higher
   C77-12 (#3D+) or C77-13 (#3D-) - Body ground and other terminals	Always	1 MΩ or higher
   C77-15 (#4D+) or C77-14 (#4D-) - Body ground and other terminals	Always	1 MΩ or higher

   HINT: 

   • The standard values shown are direct fuel injector assembly resistance values.
   • If the measured resistance value differs from the other cylinders and the injector resistance is normal, check the related cylinder as a poorly connected connector is suspected.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

See step  5

Result: 

NG 

See step  4

1. Check the resistance of the direct fuel injector assembly.

   Refer to INSPECTION [08/2020 - ]

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPAIR OR REPLACE HARNESS OR CONNECTOR (DIRECT FUEL INJECTOR ASSEMBLY - ECM) 

Result: 

NG 

See step  5

1. Replace the direct fuel injector assembly.

   Refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]

   HINT: 

   Perform "Inspection After Repair" after replacing the direct fuel injector assembly.

   Refer to INITIALIZATION [08/2020 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  7

1. Replace the ECM.

   Refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  7

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Clear the DTCs.

   Powertrain > Engine > Clear DTCs 

5. Turn the engine switch off and wait for at least 30 seconds.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  8

1. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
2. Enter the following menus: Powertrain / Engine / Trouble Codes.
3. Read the DTCs.

   Powertrain > Engine > Trouble Codes 

   OK

   DTCs are not output.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

END