P127A

2GR-FSE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1276: Port Injector Circuit No. 1

DTC P1276 - Port Injector Circuit No. 1

DTC 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

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 the intake port injection systems in accordance with the engine speed and load.






MONITOR DESCRIPTION

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 check engine warning light.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





WIRING DIAGRAM









INSPECTION PROCEDURE

PROCEDURE

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P1276, P1277,P1278,P1279, P127A,OR P127B)
(a) Connect Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the tester on.
(d) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(e) Read DTCs.
Result:






C -- GO TO DTC CHART
B -- CHECK AND REPLACE IG2 FUSE
A -- Continue to next step.
2. CHECK ECM TERMINAL VOLTAGE (#1P, #2P, #3P, #4P, #5P OR #6P TERMINAL)




(a) Inspect using an oscilloscope.
(b) While idling, check the waveform of the ECM connectors.
Standard:






OK -- CHECK FOR INTERMITTENT PROBLEMS
NG -- Continue to next step.
3. CHECK INJECTOR CONNECTOR TERMINAL VOLTAGE




(a) Disconnect the fuel injector for port injection connector.
(b) Turn the engine switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- CHECK AND REPAIR HARNESS OR CONNECTOR (IG2 RELAY - INJECTOR FOR PORT INJECTION)
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (ECM - FUEL INJECTOR FOR PORT INJECTION)




(a) Disconnect the ECM connector.
(b) Disconnect the injector connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for short):






Standard resistance (Check for short):





(d) Reconnect the injector connector.
(e) Reconnect the ECM connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. CHECK FUEL INJECTOR FOR PORT INJECTION (RESISTANCE)
(a) Check the fuel injector for port injection resistance Fuel Injector (for Port Injection).
NG -- REPLACE FUEL INJECTOR FOR PORT INJECTION
OK -- REPLACE ECM