P1279
DTC P1276 Port Injector Circuit No. 1DTC P1277 Port Injector Circuit No. 2
DTC P1278 Port Injector Circuit No. 3
DTC P1279 Port Injector Circuit No. 4
DTC P127A Port Injector Circuit No. 5
DTC P127B Port Injector Circuit No. 6
DTC P127C Port Injector Circuit #7
DTC P127D Port Injector Circuit #8
DESCRIPTION
DTC Detection Condition:
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 the intake port injection systems in accordance with the engine speed and load.
MONITOR DESCRIPTION
Monitor Strategy:
Typical Enabling Conditions:
Typical Malfunction Thresholds:
The ECM monitors the injection control of the port injector. If a malfunction is detected in the port injector circuit, the ECM cancels the injection control for the corresponding cylinder and turns on the MIL.
Wiring Diagram (Part 1):
Wiring Diagram (Part 2):
Step 1:
Step 1(Continued)-2:
Step 3-4:
INSPECTION PROCEDURE
HINT: Read freeze frame data using the intelligent tester or Techstream. Freeze frame data records the engine condition when malfunctions are detected. 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.