P0202

4GR-FSE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0200: Injector Circuit / Open

DTC P0200 - Injector Circuit / Open

DTC P0201 - Injector Circuit / Open - (Cylinder 1)

DTC P0202 - Injector Circuit / Open - (Cylinder 2)

DTC P0203 - Injector Circuit / Open - (Cylinder 3)

DTC P0204 - Injector Circuit / Open - (Cylinder 4)

DTC P0205 - Injector Circuit / Open - (Cylinder 5)

DTC P0206 - Injector Circuit / Open - (Cylinder 6)

DTC 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





WIRING DIAGRAM









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. INSPECT INJECTOR DRIVER (POWER SOURCE OF EDU)




(a) Disconnect the E58 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 -- CHECK EDU (POWER SOURCE CIRCUIT)
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (EDU - FUEL INJECTOR)




(a) Disconnect the H1 and I1 connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





(c) Reconnect the injector driver (EDU) connector.
NG -- INSPECT FUEL INJECTOR ASSEMBLY (RESISTANCE)
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (ECM - EDU)




(a) Disconnect the E5, E3 and E6 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 connector.
(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 an oscilloscope to terminals #10 to #60 and E1 of the E5, E4 and E3 ECM harness side connectors.
(b) With the engine cranking or idling, check the signal waveform.
Standard:
Signal waveform appears as shown in the illustration.





HINT:
Check the waveform before the ECM detects the DTC(s) and enters the fail-safe mode, because the ECM will not indicate the output voltage any more once it enters the fail-safe mode.

NG -- REPLACE ECM
OK -- Continue to next step.
5. CHECK ECM (INJF VOLTAGE)




(a) Connect an oscilloscope to terminals INJF and E1 of the E4 and E6 ECM harness side connectors.
(b) With the engine cranking or idling, check the signal waveform.
Standard:
Signal waveform appears as shown in the illustration.





HINT:
Check the waveform before the ECM detects the DTC(s) and enters the fail-safe mode, because the injector driver (EDU) will not indicate the output voltage any more once it enters the fail-safe mode.

NG -- REPLACE INJECTOR DRIVER
OK -- CHECK FOR INTERMITTENT PROBLEMS
6. INSPECT FUEL INJECTOR ASSEMBLY (RESISTANCE)
(a) Check the resistance of the fuel injector Testing and Inspection.
NG -- REPLACE FUEL INJECTOR
OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR