SFI SYSTEM(w/o Canister Pump Module), Diagnostic DTC:P1276, P1277, P1278, P1279, P127A, P127B, P127C, P127D
| DTC Code | DTC Name |
|---|---|
| P1276 | Port Injector Circuit #1 |
| P1277 | Port Injector Circuit #2 |
| P1278 | Port Injector Circuit #3 |
| P1279 | Port Injector Circuit #4 |
| P127A | Port Injector Circuit #5 |
| P127B | Port Injector Circuit #6 |
| P127C | Port Injector Circuit #7 |
| P127D | Port Injector Circuit #8 |
DESCRIPTION
The D-4S system has two injection systems. One is the in-cylinder direct injection system that directly injects pressurized fuel into the combustion chamber. The other is the intake port injection system. The ECM determines the percentage of in-cylinder direct injection to intake port injection in accordance with the engine speed and load.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
|---|---|---|---|---|---|
| P1276 | Port Injector Circuit #1 | Current is not applied to the injector 10 times or more with the engine running (1 trip detection logic). |
|
Comes on | DTC stored |
| P1277 | Port Injector Circuit #2 | Current is not applied to the injector 10 times or more with the engine running (1 trip detection logic). |
|
Comes on | DTC stored |
| P1278 | Port Injector Circuit #3 | Current is not applied to the injector 10 times or more with the engine running (1 trip detection logic). |
|
Comes on | DTC stored |
| P1279 | Port Injector Circuit #4 | Current is not applied to the injector 10 times or more with the engine running (1 trip detection logic). |
|
Comes on | DTC stored |
| P127A | Port Injector Circuit #5 | Current is not applied to the injector 10 times or more with the engine running (1 trip detection logic). |
|
Comes on | DTC stored |
| P127B | Port Injector Circuit #6 | Current is not applied to the injector 10 times or more with the engine running (1 trip detection logic). |
|
Comes on | DTC stored |
| P127C | Port Injector Circuit #7 | Current is not applied to the injector 10 times or more with the engine running (1 trip detection logic). |
|
Comes on | DTC stored |
| P127D | Port Injector Circuit #8 | Current is not applied to the injector 10 times or more with the engine running (1 trip detection logic). |
|
Comes on | DTC stored |
MONITOR DESCRIPTION
The ECM monitors the injection control of the port fuel injector assembly. If a malfunction is detected in the port fuel injector assembly circuit, the ECM cancels the injection control for the corresponding cylinder and illuminates the MIL.
MONITOR STRATEGY
| Required Sensors/Components | Port fuel injector assembly (cylinder 1 to 8) |
| Frequency of Operation | Continuous |
CONFIRMATION DRIVING PATTERN
-
Connect the GTS to the DLC3.
-
Turn the engine switch on (IG).
-
Turn the GTS on.
-
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
-
Turn the engine switch off and wait for at least 30 seconds.
-
Turn the engine switch on (IG).
-
Turn the GTS on.
-
Start the engine.
-
Idle the engine for 10 seconds [A].
-
Enter the following menus: Powertrain / Engine / Trouble Codes.
-
Read the DTCs [B].
Tech Tips
-
If a pending DTC is output, the system is malfunctioning.
-
If a pending DTC is not output, perform the following procedure.
-
-
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
-
Input the DTC: P1276, P1277, P1278, P1279, P127A, P127B, P127C or P127D.
-
Check the DTC judgment result.
GTS Display Description NORMAL
-
DTC judgment completed
-
System normal
ABNORMAL
-
DTC judgment completed
-
System abnormal
INCOMPLETE
-
DTC judgment not completed
-
Perform driving pattern after confirming DTC enabling conditions
N/A
-
Unable to perform DTC judgment
-
Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
Tech Tips
-
If the judgment result shows NORMAL, the system is normal.
-
If the judgment result shows ABNORMAL, the system has a malfunction.
-
If the judgment result shows INCOMPLETE or N/A, perform steps [A] and [B] again.
-
WIRING DIAGRAM
CAUTION / NOTICE / HINT
Note
Inspect the fuses for circuits related to this system before performing the following procedure.
Tech Tips
Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
PROCEDURE
-
READ OUTPUT DTCS (DTC P1276, P1277, P1278, P1279, P127A, P127B, P127C OR P127D)
-
Connect the GTS to the DLC3.
-
Turn the engine switch on (IG).
-
Turn the GTS on.
-
Enter the following menus: Powertrain / Engine / Trouble Codes.
Powertrain > Engine > Trouble Codes -
Read the DTCs.
Result Result Proceed to DTC P1276, P1277, P1278, P1279, P127A, P127B, P127C or P127D is output A DTC P1276, P1277, P1278, P1279, P127A, P127B, P127C and P127D are output B
B 
CHECK HARNESS AND CONNECTOR (PORT FUEL INJECTOR ASSEMBLY - NO. 1 INTEGRATION RELAY) Click here
A 
-
-
CHECK TERMINAL VOLTAGE (POWER SOURCE OF PORT FUEL INJECTOR ASSEMBLY)
*a Front view of wire harness connector
(to Port Fuel Injector Assembly)
-
Disconnect the port fuel injector assembly connector.
-
Turn the engine switch on (IG).
-
Measure the voltage according to the value(s) in the table below
Standard Voltage Tester Connection Switch Condition Specified Condition J1-2 - Body ground Engine switch on (IG) 11 to 14 V I1-2 - Body ground Engine switch on (IG) 11 to 14 V J2-2 - Body ground Engine switch on (IG) 11 to 14 V I2-2 - Body ground Engine switch on (IG) 11 to 14 V J3-2 - Body ground Engine switch on (IG) 11 to 14 V I3-2 - Body ground Engine switch on (IG) 11 to 14 V J4-2 - Body ground Engine switch on (IG) 11 to 14 V I4-2 - Body ground Engine switch on (IG) 11 to 14 V Result Proceed to OK NG
NG
GO TO STEP 5 Click here
OK
-
-
CHECK HARNESS AND CONNECTOR (PORT FUEL INJECTOR ASSEMBLY - ECM)
-
Disconnect the E4 or E2 ECM connector.
-
Disconnect the J1, I1, J2, I2, J3, I3, J4 or I4 port fuel injector assembly connector.
-
Measure the resistance according to the value(s) in the table below.
Standard Resistance Tester Connection Condition Specified Condition J1-1 - E4-17 (#10) Always Below 1 Ω I1-1 - E2-11 (#20) Always Below 1 Ω J2-1 - E4-16 (#30) Always Below 1 Ω I2-1 - E2-10 (#40) Always Below 1 Ω J3-1 - E4-15 (#50) Always Below 1 Ω I3-1 - E2-9 (#60) Always Below 1 Ω J4-1 - E4-14 (#70) Always Below 1 Ω I4-1 - E2-8 (#80) Always Below 1 Ω J1-1 or E4-17 (#10) - Body ground and other terminals Always 10 kΩ or higher I1-1 or E2-11 (#20) - Body ground and other terminals Always 10 kΩ or higher J2-1 or E4-16 (#30) - Body ground and other terminals Always 10 kΩ or higher I2-1 or E2-10 (#40) - Body ground and other terminals Always 10 kΩ or higher J3-1 or E4-15 (#50) - Body ground and other terminals Always 10 kΩ or higher I3-1 or E2-9 (#60) - Body ground and other terminals Always 10 kΩ or higher J4-1 or E4-14 (#70) - Body ground and other terminals Always 10 kΩ or higher I4-1 or E2-8 (#80) - Body ground and other terminals Always 10 kΩ or higher Result Proceed to OK NG
NG 
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
-
-
INSPECT PORT FUEL INJECTOR ASSEMBLY (RESISTANCE)
-
Inspect the port fuel injector assembly.
Tech Tips
Perform "Inspection After Repair" after replacing the port fuel injector assembly.
Result Proceed to OK NG
OK
REPLACE ECM Click here
NG
REPLACE PORT FUEL INJECTOR ASSEMBLY Click here
-
-
CHECK HARNESS AND CONNECTOR (PORT FUEL INJECTOR ASSEMBLY - NO. 1 INTEGRATION RELAY)
-
Remove the No. 1 integration relay from No. 2 engine room relay block.
-
Disconnect the J1, I1, J2, I2, J3, I3, J4 or I4 port fuel injector assembly connector.
-
Measure the resistance according to the value(s) in the table below.
Standard Resistance Tester Connection Condition Specified Condition J1-2 - 2E-2 Always Below 1 Ω I1-2 - 2E-2 Always Below 1 Ω J2-2 - 2E-2 Always Below 1 Ω I2-2 - 2E-2 Always Below 1 Ω J3-2 - 2E-2 Always Below 1 Ω I3-2 - 2E-2 Always Below 1 Ω J4-2 - 2E-2 Always Below 1 Ω I4-2 - 2E-2 Always Below 1 Ω J1-2 or 2E-2 - Body ground and other terminals Always 10 kΩ or higher I1-2 or 2E-2 - Body ground and other terminals Always 10 kΩ or higher J2-2 or 2E-2 - Body ground and other terminals Always 10 kΩ or higher I2-2 or 2E-2 - Body ground and other terminals Always 10 kΩ or higher J3-2 or 2E-2 - Body ground and other terminals Always 10 kΩ or higher I3-2 or 2E-2 - Body ground and other terminals Always 10 kΩ or higher J4-2 or 2E-2 - Body ground and other terminals Always 10 kΩ or higher I4-2 or 2E-2 - Body ground and other terminals Always 10 kΩ or higher Result Proceed to OK NG
OK
REPLACE NO.1 INTEGRATION RELAY Click here
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
-