P0204

4GR-FSE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0200-P0206, P12FF: Injector Circuit / Open
P12FF - Electric Driver Unit

DESCRIPTION

The high speed activation of the high pressure fuel injector is possible through the high-voltage, rapid-recharge DC/DC converter. Using high pressure fuel, the atomized fuel's injection timing can be accurately controlled, which decreases emissions and fuel consumption. The steady ECM checks the injector driver movement. When the injector driver or injector has a malfunction, the injection control of the relevant cylinder is stopped or power to the injector relay is cut. Then the ECM illuminates the check engine warning light.





MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS

P0200





P0201, P0202, P0203, P0204, P0205 and P0206





CONFIRMATION DRIVING PATTERN

1. Connect the Techstream to the DLC3.

2. Turn the engine switch on (IG) and turn the Techstream on.

3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure) Reading and Clearing Diagnostic Trouble Codes.

4. Turn the engine switch off and wait for at least 30 seconds.

5. Turn the engine switch on (IG) and turn the Techstream on.

6. Start the engine.

7. Idle the engine for 15 seconds or more [A].

8. Enter the following menus: Powertrain / Engine / Trouble Codes.

9. Read the pending DTC [B].

HINT
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.

10. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

11. Input the DTC: P0200, P0201, P0202, P0203, P0204, P0205, P0206 or P12FF.

12. Check the DTC judgment result.





HINT
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows INCOMPLETE or N/A, perform steps [A] and [B] again.

13. If 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

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT
Read freeze frame data using 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 be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction Freeze Frame Data.

PROCEDURE

1. CHECK DTC OUTPUT

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Trouble Codes.

(e) Read the DTCs.

Result:





B -- CHECK HARNESS AND CONNECTOR (ECM - INJECTOR DRIVER)
A -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR

(a) Disconnect the H1 and I1 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):





(c) Reconnect the injector driver (EDU) connectors.

NG -- INSPECT FUEL INJECTOR ASSEMBLY (RESISTANCE)
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (ECM - INJECTOR DRIVER)

(a) Disconnect the E5 and E3 ECM connectors.

(b) Disconnect the E26 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):





(d) Reconnect the ECM connectors.

(e) Reconnect the injector driver (EDU) connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. CHECK ECM (#10, #20, #30, #40, #50 AND #60 VOLTAGE)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(e) Disconnect the E26 injector driver (EDU) connector.

(f) 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 Removal

5. CHECK HARNESS AND CONNECTOR (ECM - INJECTOR DRIVER)

(a) Disconnect the E6 ECM connector.

(b) Disconnect the E26 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):





(d) Reconnect the injector driver (EDU) connector.

(e) Reconnect the ECM connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

6. CHECK TERMINAL VOLTAGE (ECM OUTPUT VOLTAGE)

(a) Disconnect the E26 injector driver (EDU) connector.





(b) Turn the engine switch on (IG).

(c) Measure the voltage according to the value(s) in the table below.

Standard voltage:





(d) Reconnect the injector driver (EDU) connector.

NG -- REPLACE ECM Removal

OK -- REPLACE INJECTOR DRIVER Removal

7. INSPECT FUEL INJECTOR ASSEMBLY (RESISTANCE)

(a) Check the resistance of the fuel injector Testing and Inspection.

NG -- REPLACE FUEL INJECTOR Removal

OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (INJECTOR DRIVER - FUEL INJECTOR)