P062D
FA20 ENGINE CONTROL: SFI SYSTEM: P062D, P1261-P1264; No. 1 Fuel Injector Driver Circuit Performance; 2013 MY FR-S [03/2012 -]
P062D - No. 1 Fuel Injector Driver Circuit Performance
P1261 - DI Injector Circuit / Open - (Cylinder 1)
P1262 - DI Injector Circuit / Open - (Cylinder 2)
P1263 - DI Injector Circuit / Open - (Cylinder 3)
P1264 - DI Injector Circuit / Open - (Cylinder 4)
DESCRIPTION
The D-4S system has two fuel injection methods. One is the in-cylinder direct injection method that directly injects pressurized fuel into the combustion chamber. The other is the intake port injection method. The ECM determines which fuel injection method to use in accordance with the engine conditions. For the in-cylinder direction injection method, the injector driver (EDU) in the engine room operates the fuel injectors (for direction injection) at high speeds. The EDU receives fuel injection request signals from the ECM and converts the signals to high voltage / high current injector operation signals to operate the fuel injectors (for direction injection).
The fuel injection sequence occurs in numerical order from No. 1 to No. 4.
The ECM monitors the EDU at all times. If drivers or fuel injectors are malfunctioning, the EDU sends fuel injector operation condition signals (fail signals IJF1 to IJF2) to the ECM. When the ECM receives the signals, the ECM stops the fuel injection control of the appropriate cylinders, cuts voltage to the appropriate injector relay, and illuminates the MIL.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
P062D
P1261, P1262, P1263, P1264
CONFIRMATION DRIVING PATTERN
1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON and turn the Techstream on.
3. Record the Freeze Frame Data.
4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure) Reading and Clearing Diagnostic Trouble Codes.
5. Turn the ignition switch off and wait for at least 30 seconds.
6. Turn the ignition switch to ON and turn the Techstream on.
7. Based on engine speed, engine load and other freeze frame data stored in the ECM, reproduce the conditions present when the DTC was stored.
8. Enter the following menus: Powertrain / Engine / Trouble Codes.
9. Read the DTC.
HINT
* If a DTC is output, the system is malfunctioning.
* If a DTC is not output, perform the following procedure.
10. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
11. Input the DTC: P062D, P1261, P1262, P1263 or P1264.
12. Check the DTC judgment result.
HINT
* If the judgment result shown ABNORMAL, the system has a malfunction.
* If the judgment result shows NORMAL, the system is normal.
13. If the test result is INCOMPLETE or N/A and no DTC is output, perform a universal trip and check for permanent DTCs Reading and Clearing Diagnostic Trouble Codes.
HINT
* If a permanent DTC is output, the system is malfunctioning.
* If no permanent DTC is output, the system is normal.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT
* If DTC P1261 is output, check the No. 1 fuel injector (for direct injection) (No. 1 cylinder) circuit.
* If DTC P1262 is output, check the No. 2 fuel injector (for direct injection) (No. 2 cylinder) circuit.
* If DTC P1263 is output, check the No. 3 fuel injector (for direct injection) (No. 3 cylinder) circuit.
* If DTC P1264 is output, check the No. 4 fuel injector (for direct injection) (No. 4 cylinder) circuit.
* If the current from the INJ relay is cut because DTC P062D is stored, DTC P1235 will be stored even if the fuel pump assembly (for high pressure) is normal.
* Read freeze frame data using the Techstream. 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
1. CHECK DTC OUTPUT
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Trouble Codes.
(e) Read the DTCs.
Result:
B -- CHECK HARNESS OR CONNECTOR (ECM - INJECTOR DRIVER (EDU))
A -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR
(a) Disconnect the injector driver (EDU) connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for open):
HINT
The standard values shown are fuel injector assembly resistance values.
Standard Resistance (Check for short):
NG -- INSPECT FUEL INJECTOR ASSEMBLY (FOR DIRECT INJECTION)
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (ECM - INJECTOR DRIVER (EDU))
(a) Disconnect the ECM connectors.
(b) Disconnect the injector driver (EDU) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for open):
Standard Resistance (Check for short):
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. CLEAR DTC
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
(e) Turn the ignition switch off and wait for at least 30 seconds.
NEXT -- Continue to next step.
5. CHECK ECM (ECM OUTPUT VOLTAGE)
(a) Disconnect the injector driver (EDU) connector.
(b) Inspect the ECM using an oscilloscope.
(1) While cranking the engine, check waveform the terminals of the ECM connector.
Standard:
Signal waveform appears as shown in the illustration.
NG -- REPLACE ECM Removal
OK -- REPLACE INJECTOR DRIVER (EDU) Removal
6. CHECK HARNESS OR CONNECTOR (ECM - INJECTOR DRIVER (EDU))
(a) Disconnect the ECM connector.
(b) Disconnect the injector driver (EDU) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for open):
Standard Resistance (Check for short):
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
7. CHECK TERMINAL VOLTAGE (ECM OUTPUT VOLTAGE)
(a) Disconnect the injector driver (EDU) connector.
(b) Inspect the ECM using an oscilloscope.
(1) While start the engine, check waveform the terminals of the ECM connector.
Standard:
Signal waveform appears as shown in the illustration.
NG -- REPLACE ECM Removal
OK -- REPLACE INJECTOR DRIVER (EDU) Removal
8. INSPECT FUEL INJECTOR ASSEMBLY (FOR DIRECT INJECTION)
(a) Inspect the resistance of the fuel injector (for direct injection) Fuel Injector (For Direct Injection).
NG -- REPLACE FUEL INJECTOR ASSEMBLY (FOR DIRECT INJECTION) Removal
OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR