GSIC - Global Service Information Center

DTC P0200/97 Injector Circuit / Open

for Preparation Click here

DESCRIPTION

HINT:

For more information on the EDU, refer to the system description (Click here).
If P0200/97 is present, refer to the "Diagnostic Trouble Code (DTC) Table for Common Rail System" (Click here).

The EDU drives the injectors at high speeds. The EDU delivers high-speed driving under high pressure fuel conditions using the DC/DC converter that provides a high-voltage and quick-charging system.
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
P0200/97	Open or short in EDU or injector circuit After engine is started, there is no IJF signal from EDU to ECM, despite ECM sending IJT signal to EDU (1 trip detection logic)	Open or short in EDU circuit Injector EDU ECM

MONITOR DESCRIPTION

P0200/97 (Open or short in 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 (injector drive circuit), in relation to the current drawn by the injector. When the injector current becomes too high, the voltage drop over the resistor exceeds a specified level and no IJF signal for that cylinder is sent to the ECM.
P0200/97 refers to a malfunction in the EDU or injector circuit.
If this DTC is set, the ECM enters fail-safe mode and limits the engine power. The fail-safe mode continues until the ignition switch is turned OFF.

MONITOR STRATEGY

Required sensors	IJF signal from EDU
Frequency of operation	Continuous
Duration	10 seconds
MIL operation	1 driving cycle

TYPICAL ENABLING CONDITIONS

Item	Specification Minimum	Specification Maximum
Engine speed	500 rpm	-
Battery voltage	11 V	-
Ignition switch	ON	ON

TYPICAL MALFUNCTION THRESHOLDS

Threshold

The injection missing counter* for all the cylinders, or for one individual cylinder, reaches a specified number (taking approximately 1 second from starting the engine)
*: Increments when no IJF signal is received from the EDU despite the ECM sending IJT signals

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, and other data from the time the malfunction occurred.

NOTICE:

If the ECM is replaced, the new ECM needs initialization (Click here).

1.INSPECT INJECTOR ASSEMBLY

Disconnect the F5, F6, F7 and F8 injector connectors.

Measure the resistance of the injector.
Standard resistance:
Tester Connection
Specified Condition
1 - 2
0.85 to 1.05 Ω at 20°C (68°F)

REPLACE INJECTOR ASSEMBLY

OK

2.CHECK WIRE HARNESS (INJECTOR ASSEMBLY - EDU)

Check the wire harness between the injector and EDU (INJ terminal).

Disconnect the F5, F6, F7 and F8 connectors.
Disconnect the I1 EDU connector.

Measure the resistance of the wire harness side connectors.

Standard resistance:

Tester Connection	Specified Condition
F5-2 - I1-4 (INJ#1)	Below 1 Ω
F6-2 - I1-2 (INJ#2)	Below 1 Ω
F7-2 - I1-1 (INJ#3)	Below 1 Ω
F8-2 - I1-3 (INJ#4)	Below 1 Ω
F5-1 - I1-5 (COM1)	Below 1 Ω
F6-1 - I1-6 (COM2)	Below 1 Ω
F7-1 - I1-6 (COM2)	Below 1 Ω
F8-1 - I1-5 (COM1)	Below 1 Ω
F5-2 or I1-4 (INJ#1) - Body ground	10 kΩ or higher
F6-2 or I1-2 (INJ#2) - Body ground	10 kΩ or higher
F7-2 or I1-1 (INJ#3) - Body ground	10 kΩ or higher
F8-2 or I1-3 (INJ#4) - Body ground	10 kΩ or higher
F5-1 or I1-5 (COM1) - Body ground	10 kΩ or higher
F6-1 or I1-6 (COM2) - Body ground	10 kΩ or higher
F7-1 or I1-6 (COM2) - Body ground	10 kΩ or higher
F8-1 or I1-5 (COM1) - Body ground	10 kΩ or higher

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

3.CHECK WIRE HARNESS (EDU - ECM)

Disconnect the I2 EDU connector.

Disconnect the E8 ECM connector.

Measure the resistance of the wire harness side connectors.

Standard resistance:

Tester Connection	Specified Condition
I2-6 (IJt#1) - E8-24 (#1)	Below 1 Ω
I2-3 (IJt#2) - E8-23 (#2)	Below 1 Ω
I2-2 (IJt#3) - E8-22 (#3)	Below 1 Ω
I2-5 (IJt#4) - E8-21 (#4)	Below 1 Ω
I2-7 (IJf) - E8-25 (INJF)	Below 1 Ω
I2-6 (IJt#1) or E8-24 (#1) - Body ground	10 kΩ or higher
I2-3 (IJt#2) or E8-23 (#2) - Body ground	10 kΩ or higher
I2-2 (IJt#3) or E8-22 (#3) - Body ground	10 kΩ or higher
I2-5 (IJt#4) or E8-21 (#4) - Body ground	10 kΩ or higher
I2-7 (IJf) or E8-25 (INJF) - Body ground	10 kΩ or higher

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

4.CHECK INJECTOR DRIVER (BATTERY VOLTAGE)

Disconnect the I1 and I2 EDU connectors.

Turn the ignition switch ON.

Measure the voltage of the wire harness side connectors.
Standard voltage:
Tester Connection
Specified Condition
I1-8 (BATTERY) - I2-1 (GND)
9 to 14 V

CHECK INJECTOR DRIVER POWER SOURCE CIRCUIT (BATTERY - EDU)

OK

5.CHECK ECM (INJECTOR VOLTAGE)

While idling the engine, check the waveform of the ECM connectors using an oscilloscope.

Standard voltage:

Tester Connection	Specified Condition
E8-24 (#1) - E7-7 (E1)	Correct waveform is shown
E8-23 (#2) - E7-7 (E1)	Correct waveform is shown
E8-22 (#3) - E7-7 (E1)	Correct waveform is shown
E8-21 (#4) - E7-7 (E1)	Correct waveform is shown
E8-25 (INJF) - E7-7 (E1)	Correct waveform is shown

Tool Setting	Condition
(a) 5 V/DIV., 20 msec./DIV.	Idling with warm engine
(b) 2 V/DIV., 20 msec./DIV.	Idling with warm engine

HINT:

The waveform varies depending on the injector injection.

REPLACE ECM

OK

6.REPLACE INJECTOR DRIVER

CHECK IF DTC OUTPUT RECURS (DTC P0200/97)

Tester Connection	Specified Condition
1 - 2	0.85 to 1.05 Ω at 20°C (68°F)

Tester Connection	Specified Condition
I1-8 (BATTERY) - I2-1 (GND)	9 to 14 V