DTC P0200 2AD-FHV

DTC P0200 Injector Circuit / Open

 

Description

The EDU drives the injectors at high speeds. The EDU delivers high-speed drive signals under high-pressure fuel conditions using the DC/DC converter, which provides a high-voltage and quick-charging system.
Soon after the EDU receives an injection command (#) signal from the ECM, the EDU responds to the command with an injector injection confirmation (INJF) signal when the current is applied to the injector.


Description DTC P0200

Toyota fault code list DTC P0200  2AD-FHV

DTC No. DTC Detection Condition Trouble Area
P0200 Open or short in EDU or injector circuit
After engine is started, there is no INJF signal from EDU to ECM, despite ECM sending # signals to EDU
(1 trip detection logic)
  1. Open or short in EDU circuit
  2. Injector
  3. EDU
  4. ECM

 

HINT:

DTC P0200 is detected when starting the engine and letting it idle for 30 seconds.

 

Monitor description

  1. P0200 (Open or short in EDU or injector circuit):
    The ECM continuously monitors both injection command (#) signals and injection confirmation (INJF) signals. This DTC will be set if the ECM determines that the number of # signals and INJF 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 INJF signal for that cylinder is sent to the ECM.
    P0200 refers to a malfunction in the EDU or injector circuit.
    If this DTC is set, the ECM enters fail-safe mode and limits engine power or stops the engine. The fail-safe mode continues until the ignition switch is turned off.

    Monitor description DTC P0200

Monitor strategy

 

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

Typical enabling conditions

 

Item Specification Specification
Minimum Maximum
Engine speed 500 rpm -
Battery voltage 11 V -
Ignition switch on (IG) on (IG)

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 after starting the engine)
*: Increments when no INJF signal is received from the EDU despite the ECM sending # signals

Wiring diagram


Wiring diagram DTC P0200

 


Wiring diagram DTC P0200

Inspection procedure

 

NOTICE:

  1. After replacing the ECM, the new ECM needs registration .
  2. After replacing an injector, the ECM needs registration .

 

1.INSPECT INJECTOR ASSEMBLY
Disconnect the B36, B37, B38, and B39 injector connectors.
  1. Disconnect the B36, B37, B38, and B39 injector connectors.

  2. Measure the resistance of the injector.

     

    Standard resistance:

    Tester Connection Condition Specified Condition
    1 - 2 20°C (68°F) 0.9 to 1.1 M?
  3. Reconnect the injector connectors.

 

  NG  
REPLACE INJECTOR ASSEMBLY
 
OK  
   
2.CHECK WIRE HARNESS (INJECTOR - EDU)
A128634E01
  1. Disconnect the B36, B37, B38, and B39 injector connectors.

  2. Disconnect the B50 and B58 EDU connectors.

  3. Measure the resistance of the wire harness side connectors.

     

    Standard resistance:

    Tester Connection Specified Condition
    B36-1 - B58-2 (IJ1+) Below 1 ?
    B37-1 - B58-5 (IJ2+) Below 1 ?
    B38-1 - B58-4 (IJ3+) Below 1 ?
    B39-1 - B58-1 (IJ4+) Below 1 ?
    B36-2 - B50-4 (IJ1-) Below 1 ?
    B37-2 - B50-5 (IJ2-) Below 1 ?
    B38-2 - B50-6 (IJ3-) Below 1 ?
    B39-2 - B50-1 (IJ4-) Below 1 ?
    B36-1 or B58-2 (IJ1+) - Body ground 10 k? or higher
    B37-1 or B58-5 (IJ2+) - Body ground 10 k? or higher
    B38-1 or B58-4 (IJ3+) - Body ground 10 k? or higher
    B39-1 or B58-1 (IJ4+) - Body ground 10 k? or higher
    B36-2 or B50-4 (IJ1-) - Body ground 10 k? or higher
    B37-2 or B50-5 (IJ2-) - Body ground 10 k? or higher
    B38-2 or B50-6 (IJ3-) - Body ground 10 k? or higher
    B39-2 or B50-1 (IJ4-) - Body ground 10 k? or higher
  4. Reconnect the injector connectors.

  5. Reconnect the EDU connectors.

 

  NG  
REPAIR OR REPLACE HARNESS AND CONNECTOR
 
OK  
   
3.CHECK WIRE HARNESS (EDU - ECM)
Disconnect the B51 EDU connector.
  1. Disconnect the B51 EDU connector.

  2. Disconnect the B32 ECM connector.

  3. Measure the resistance of the wire harness side connectors.

     

    Standard resistance:

    Tester Connection Specified Condition
    B51-12 (#10) - B32-50 (#1) Below 1 ?
    B51-10 (#20) - B32-49 (#2) Below 1 ?
    B51-9 (#30) - B32-48 (#3) Below 1 ?
    B51-11 (#40) - B32-47 (#4) Below 1 ?
    B51-6 (INJF) - B32-51 (INJF) Below 1 ?
    B51-12 (#10) or B32-50 (#1) - Body ground 10 k? or higher
    B51-10 (#20) or B32-49 (#2) - Body ground 10 k? or higher
    B51-9 (#30) or B32-48 (#3) - Body ground 10 k? or higher
    B51-11 (#40) or B32-47 (#4) - Body ground 10 k? or higher
    B51-6 (INJF) or B32-51 (INJF) - Body ground 10 k? or higher
  4. Reconnect the EDU connector.

  5. Reconnect the ECM connector.

 

  NG  
REPAIR OR REPLACE HARNESS AND CONNECTOR
 
OK  
   
4.CHECK EDU
Disconnect the B50 EDU connector.
  1. Disconnect the B50 EDU connector.

  2. Turn the ignition switch on (IG).

  3. Measure the voltage of the wire harness side connector.

     

    Standard voltage:

    Tester Connection Specified Condition
    B50-3 (+B) - B50-2 (GND) 9 to 14 V
  4. Reconnect the EDU connector.

 

  NG  
CHECK EDU POWER SOURCE CIRCUIT
 
OK  
   
5.REPLACE EDU
  1. Replace the EDU.

 

NEXT  
   
6.CHECK WHETHER DTC OUTPUT RECURS
  1. Connect the intelligent tester to the DLC3.

  2. Turn the ignition switch on (IG) and turn the tester ON.

  3. Clear DTCs

  4. Start the engine and drive the vehicle for approximately 15 minutes.

  5. Enter the following menus: Powertrain / Engine and ECT / DTC.

  6. Read the DTCs.

     

    Result:
    Display (DTC Output) Proceed to
    P0200 A
    No output B

 

  B  
SYSTEM IS OK
 
A  
   
REPLACE ECM