Dtc P0200 Injector Circuit / Open
DESCRIPTION
MONITOR DESCRIPTION
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
WIRING DIAGRAM
INSPECTION PROCEDURE
INSPECT INJECTOR ASSEMBLY
CHECK HARNESS AND CONNECTOR (INJECTOR DRIVER [EDU] - INJECTOR ASSEMBLY)
CHECK HARNESS AND CONNECTOR (INJECTOR DRIVER [EDU] - ECM)
INSPECT INJECTOR DRIVER (EDU) (BATTERY VOLTAGE)
REPLACE INJECTOR DRIVER (EDU)
CHECK WHETHER DTC OUTPUT RECURS
DTC P0200 Injector Circuit / Open |
DESCRIPTION
- HINT:
- For more information on the injector driver (EDU) (Toyota Fortuner RM0000012WW024X.html).
- If DTC P0200 is present, refer to the "Diagnostic Trouble Code (DTC) Table for Common Rail System" (Toyota Fortuner RM0000012WW024X.html).
The EDU drives the injectors at high speed. The EDU has realized high-speed driving under high-pressure fuel conditions using the DC/DC converter, which provides a high voltage and the quick-charging system. Soon after the EDU receives an injection command (IJT) signal from the ECM, the EDU responds to the command with an injector injection confirmation (IJF) signal when the current is applied to the injector.DTC No.
| DTC Detection Condition
| Trouble Area
|
P0200
| - Open or short in injector driver (EDU) or injector circuit
After engine is started, there is no IJF signal from EDU to ECM, despite ECM sending IJT signals to EDU
(1 trip detection logic)
| - Open or short in injector driver (EDU) circuit
- Injector
- EDU
- ECM
|
MONITOR DESCRIPTION
- P0200 (Open or short in injector driver (EDU) or injector circuit):
The ECM continuously monitors both injection command (IJT) signals and injection confirmation (IJF) signal. This DTC will be set if the ECM judges that the number of IJT signals and IJF signals are inconsistent.
The injectors are grounded over a Field Effect Transistor (FET) and a serial resistor. This resistor creates a voltage drop, which is monitored by the EDU, in relation to the current drawn by the injector. When the injector current becomes too high, the voltage drop over the resistor becomes higher than a specified level and for that injector no IJF signal is sent to the ECM.
P0200 refers to a malfunction of injector drive circuit or injector circuit.
If this DTC is set, the ECM enters the fail-safe mode and limits engine power. The fail-safe mode continues until the ignition switch is turned OFF.
- PULSE GENERATION INSPECTION
- HINT:
- The problem area can be identified by checking the waveform at the following terminals.
- HINT:
- A and D are on the ECM side, and B and C are on the EDU side.
Malfunction Point
| Trouble Area
|
A
| - ECM
|
B (If A is normal)
| - Open or short in "#1 to #4 (ECM)" - "#10 to #40 (EDU)" harness or connector
|
C (If A and B are normal)
| - Open or short in "IJ1+ to IJ4+ (EDU)" - "IJ1- to IJ4- (EDU)" circuit
- Injector
- EDU
|
D (If A, B and C are normal)
| - Open or short in "INJF (EDU)" - "INJF (ECM)" circuit (P1271 is set simultaneously)
|
- Reference: Inspection using the oscilloscope.
During idling, the correct waveform is as shown in the diagram.
Inspection Point
| Specified Condition
|
A and B
| Correct waveform is as shown
|
- Reference: Inspection using the oscilloscope.
During idling, the correct waveform is as shown in the diagram.
Inspection Point
| Specified Condition
|
C and D
| Correct waveform is as shown
|
MONITOR STRATEGY
Required sensor
| INJF signal from EDU
|
Frequency of operation
| Continuous
|
Duration
| 10 seconds
|
MIL operation
| 1 driving cycle
|
TYPICAL ENABLING CONDITIONS
Item
| Specification
|
Minimum
| Maximum
|
Engine speed
| 500 rpm
| -
|
Battery voltage
| 11 V
| -
|
Ignition switch
| ON
| ON
|
TYPICAL MALFUNCTION THRESHOLDS
Threshold
|
Injection missing counter* for all cylinders, or for one individual cylinder, reaches specified number (taking approximately 1 second from starting engine)
*: Increases when no IJF signal is received from the EDU despite the ECM sending the IJT signals.
|
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- After replacing the ECM, the new ECM needs registration (Toyota Fortuner RM0000012XK030X.html) and initialization (Toyota Fortuner RM0000012X2005X.html).
- HINT:
- If P0200 and P1271 are present simultaneously, there is an open in the INJF wire harness between the EDU and ECM, or there is an open in the wire harness for both the injectors and pressure discharge valve.
- Read freeze frame data using the intelligent tester. 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, and other data from the time the malfunction occurred.
| 1.INSPECT INJECTOR ASSEMBLY |
Disconnect the F4, F5, F6 and F7 injector connectors.
Measure the resistance of the injection assembly.
- Standard resistance:
Tester Connection
| Condition
| Specified Condition
|
1 - 2
| 20°C (68°F)
| 0.42 to 0.52 Ω
|
| 2.CHECK HARNESS AND CONNECTOR (INJECTOR DRIVER [EDU] - INJECTOR ASSEMBLY) |
Check the harness and connector between the injector and EDU (INJ terminal).
Disconnect the F4, F5, F6 and/or F7 injector connectors.
Disconnect the I14 and/or I15 EDU connectors.
Measure the resistance of the wire harness side connector.
- Standard resistance (Check for open):
Tester Connection
| Specified Condition
|
F4-1 - IJ1+ (I14-1)
| Below 1 Ω
|
F5-1 - IJ2+ (I14-6)
|
F6-1 - IJ3+ (I14-5)
|
F7-1 - IJ4+ (I15-3)
|
F4-2 - IJ1- (I15-6)
|
F5-2 - IJ2- (I15-4)
|
F6-2 - IJ3- (I15-2)
|
F7-2 - IJ4- (I15-5)
|
- Standard resistance (Check for short):
Tester Connection
| Specified Condition
|
F4-1 or IJ1+ (I14-1) - Body ground
| 10 kΩ or higher
|
F5-1 or IJ2+ (I14-6) - Body ground
|
F6-1 or IJ3+ (I14-5) - Body ground
|
F7-1 or IJ4+ (I15-3) - Body ground
|
F4-2 or IJ1- (I15-6) - Body ground
|
F5-2 or IJ2- (I15-4) - Body ground
|
F6-2 or IJ3- (I15-2) - Body ground
|
F7-2 or IJ4- (I15-5) - Body ground
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 3.CHECK HARNESS AND CONNECTOR (INJECTOR DRIVER [EDU] - ECM) |
Disconnect the I16 EDU connector.
Disconnect the E7 ECM connector.
Measure the resistance of the wire harness side connector.
- Standard resistance (Check for open):
Tester Connection
| Specified Condition
|
#10 (I16-4) - #1 (E7-24)
| Below 1 Ω
|
#20 (I16-8) - #2 (E7-23)
|
#30 (I16-7) - #3 (E7-22)
|
#40 (I16-3) - #4 (E7-21)
|
INJF (I16-5) - INJF (E7-25)
|
- Standard resistance (Check for short):
Tester Connection
| Specified Condition
|
#10 (I16-4) or #1 (E7-24) - Body ground
| 10 kΩ or higher
|
#20 (I16-8) or #2 (E7-23) - Body ground
|
#30 (I16-7) or #3 (E7-22) - Body ground
|
#40 (I16-3) or #4 (E7-21) - Body ground
|
INJF (I16-5) or INJF (E7-25) - Body ground
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 4.INSPECT INJECTOR DRIVER (EDU) (BATTERY VOLTAGE) |
Disconnect the I14 EDU connector.
Turn the ignition switch ON.
Measure the voltage of the EDU connector.
- Standard voltage:
Tester Connection
| Specified Condition
|
+B (I14-2) - GND (I14-3)
| 11 to 14 V
|
| | CHECK INJECTOR DRIVER POWER SOURCE CIRCUIT (BATTERY - EDU) |
|
|
| 5.REPLACE INJECTOR DRIVER (EDU) |
Replace injector driver (Toyota Fortuner RM0000046WO00GX.html).
| 6.CHECK WHETHER DTC OUTPUT RECURS |
Connect the intelligent tester to the DLC3.
Turn the ignition switch ON.
Turn the tester ON.
Clear DTCs (Toyota Fortuner RM0000012WY00LX.html).
Start the engine.
Allow the engine to idle for 30 seconds or more.
Enter the following menus: Powertrain / Engine and ECT / DTC.
Read the DTCs.
- Result:
Display (DTC Output)
| Proceed to
|
No output
| A
|
P0200
| B
|
- HINT:
- If the engine does not stat, replace the ECM.
