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 [10/2022 - ]: Procedure

1. 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 [10/2022 - 11/2023]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2023 - ] 

Result: 

A 

See step  2

1. 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
   C88-35 (#1D+) - C88-16 (#1D-)	20°C (68°F)	1.34 to 1.64 Ω
   C88-32 (#2D+) - C88-13 (#2D-)	20°C (68°F)	1.34 to 1.64 Ω
   C88-31 (#3D+) - C88-12 (#3D-)	20°C (68°F)	1.34 to 1.64 Ω
   C88-34 (#4D+) - C88-15 (#4D-)	20°C (68°F)	1.34 to 1.64 Ω
   C88-35 (#1D+) or C88-16 (#1D-) - Body ground and other terminals	Always	1 MΩ or higher
   C88-32 (#2D+) or C88-13 (#2D-) - Body ground and other terminals	Always	1 MΩ or higher
   C88-31 (#3D+) or C88-12 (#3D-) - Body ground and other terminals	Always	1 MΩ or higher
   C88-34 (#4D+) or C88-15 (#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 [10/2022 - ]

   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 [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

   HINT: 

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

   Refer to INITIALIZATION [10/2022 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  7

1. Replace the ECM.

   Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  7

1. Clear the DTCs.

   Powertrain > Engine > Clear DTCs 

2. Turn the ignition 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. Read the DTCs.

   Powertrain > Engine > Trouble Codes 

   OK

   DTCs are not output.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

END