GSIC - Global Service Information Center

### DTC P0200/97 Injector Circuit / Open

## for Preparation Click here

## DESCRIPTION

HINT:

1. For more information on the EDU, refer to the system description (Click here).
2. 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)

1. Open or short in EDU circuit
2. Injector
3. EDU
4. ECM

## MONITOR DESCRIPTION

P0200/97 (Open or short in EDU or injector circuit):

1. 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

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

1. 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)

| NG |

REPLACE INJECTOR ASSEMBLY

OK |

2.CHECK WIRE HARNESS (INJECTOR ASSEMBLY - EDU)

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

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

   2. Disconnect the I1 EDU connector.

   3. 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

| NG |

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK |

3.CHECK WIRE HARNESS (EDU - ECM)

1. Disconnect the I2 EDU connector.

1. Disconnect the E8 ECM connector.

1. 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

| NG |

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK |

4.CHECK INJECTOR DRIVER (BATTERY VOLTAGE)

1. Disconnect the I1 and I2 EDU connectors.

1. Turn the ignition switch ON.

1. 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

| NG |

CHECK INJECTOR DRIVER POWER SOURCE CIRCUIT (BATTERY - EDU)

OK |

5.CHECK ECM (INJECTOR VOLTAGE)

1. 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.

   HINT:
     The waveform varies depending on the injector injection.

| NG |

REPLACE ECM

OK |

6.REPLACE INJECTOR DRIVER

NEXT |

CHECK IF DTC OUTPUT RECURS (DTC P0200/97)