Dtc P0201 Injector Circuit / Open - (Cylinder 1)

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DTC OUTPUT

INSPECT ECM (+BD1, +BD2 VOLTAGE)

REPLACE ECM

INSPECT NO. 1 INTEGRATION RELAY (EDU)

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE NO. 1 INTEGRATION RELAY

CHECK WHETHER DTC OUTPUT RECURS

INSPECT ECM (INJECTION SIGNAL)

INSPECT INJECTOR ASSEMBLY (RESISTANCE)

REPLACE INJECTOR ASSEMBLY (RELEVANT CYLINDER)

BLEED AIR FROM FUEL SYSTEM

REGISTER INJECTOR COMPENSATION CODE AND PERFORM PILOT QUANTITY LEARNING

INSPECT ECM (INJECTION SIGNAL)

REPLACE ECM

REPAIR OR REPLACE HARNESS OR CONNECTOR

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

1. Inspect the fuses of circuits related to this system before performing the following inspection procedure.
   
2. After replacing the ECM, the new ECM needs registration (LandCruiser RM0000012XK0AVX.html) and initialization (LandCruiser RM000000TIN08IX.html).
   
3. After replacing an injector assembly, the ECM needs registration (LandCruiser RM0000012XK0AVX.html).
   

HINT:

Read freeze frame data using the GTS. 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. Connect the GTS to the DLC3.
   

2. Turn the engine switch on (IG) and turn the GTS on.
   

3. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
   

4. Read the DTCs.
   
   

   Result:

   
   

   Result	Proceed to
   DTC P0201, P0202, P0203 or P0204 is output	A
   DTC P062D is output	B

1. Measure the voltage according to the value(s) in the table below.
   

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   C151-5 (+BD1) - C152-1 (E1)	Engine switch on (IG)	11 to 14 V
   C151-4 (+BD2) - C152-1 (E1)	Engine switch on (IG)	11 to 14 V

   Text in Illustration

   *a	Component with harness connected (ECD)

1. Replace the ECM (LandCruiser RM0000013Z002DX.html).
   

1. Inspect the No. 1 integration relay (EDU) (LandCruiser RM00000469101AX_01_0006.html).
   

1. Repair or replace the harness or connector.
   

1. Replace the No. 1 integration relay.
   

1. Connect the GTS to the DLC3.
   

2. Turn the engine switch on (IG) and turn the GTS on.
   

3. Clear the DTCs (LandCruiser RM000000PDK1ENX.html).
   

4. Turn the engine switch off for 30 seconds.
   

5. Start the engine and idle it for 30 seconds.
   

6. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
   

7. Check the DTCs output on the GTS.
   

   HINT:

   1. The cylinder with the malfunctioning injector assembly can be determined based on the output DTCs.
      
   2. If the DTC P0201 is output, check the No. 1 injector assembly circuit.
      
   3. If the DTC P0202 is output, check the No. 2 injector assembly circuit.
      
   4. If the DTC P0203 is output, check the No. 3 injector assembly circuit.
      
   5. If the DTC P0204 is output, check the No. 4 injector assembly circuit.
      

1. Disconnect the injector assembly connectors for all cylinders.
   

   NOTICE:

   If only the injector assembly connector of the malfunctioning cylinder is disconnected, the engine will start and there will be rough idling. Therefore, disconnect all injector assembly connectors before inspecting the waveform.

2. Start the engine.
   

3. Check the waveform of the injector assembly connectors using an oscilloscope.
   

   
   
   
   
   

   Text in Illustration

   *a	Front view of wire harness connector (Injector Assembly)	*b	No. 1 injector assembly connector
   *c	No. 2 injector assembly connector	*d	No. 3 injector assembly connector
   *e	No. 4 injector assembly connector	-	-

   
   

   OK:

   
   

   Tester Connection	Condition	Specified Condition
   C115-1 - C115-2	Cranking	Correct waveform is as shown
   C116-1 - C116-2	Cranking	Correct waveform is as shown
   C117-1 - C117-2	Cranking	Correct waveform is as shown
   C118-1 - C118-2	Cranking	Correct waveform is as shown

4. Reconnect the injector assembly connectors for all cylinders.
   

1. Inspect the injector assembly of the cylinder relevant to the DTC (LandCruiser RM000005UHQ000X.html).
   

1. Replace the injector assembly of the cylinder relevant to the DTC (LandCruiser RM000005UHS000X.html).
   

   NOTICE:

   1. When replacing the injector assembly for a cylinder, always be sure to use a new No. 1 injection pipe sub-assembly and a new No. 2 injection pipe sub-assembly.
      
   2. Follow the procedure in the repair manual and temporarily install the No. 1 injection pipe sub-assembly, No. 2 injection pipe sub-assembly and No. 1 nozzle leakage pipe assembly pipe, and then correctly position the injector assemblies. After that, tighten parts according to the torque specifications.
      
   3. If the installation procedure is not performed correctly, injector assemblies may become out of position, which may cause the injector assemblies to deteriorate, resulting in malfunctions.
      
   4. If an injector assembly deteriorates and malfunctions, other problems such as knocking, rough idle, etc. may occur.
      
   5. If an injector assembly becomes out of position, it is possible that the seal between the injector assembly and injection pipe sub-assembly may become incomplete, resulting in a fuel leak.
      

1. Bleed the air from the fuel system (LandCruiser RM000002SY803FX_01_0002.html).
   

1. Register the injector compensation code (LandCruiser RM0000012XK0AVX_02_0003.html).
   

2. Perform the fuel injector pilot quantity learning (LandCruiser RM0000012XK0AVX_02_0009.html).
   

1. Disconnect the injector assembly connectors for all cylinders.
   

   NOTICE:

   If only the injector assembly connector of the malfunctioning cylinder is disconnected, the engine will start and there will be rough idling. Therefore, disconnect all injector assembly connectors before inspecting the waveform.

2. Start the engine.
   

3. Check the waveform of the injector assembly connectors using an oscilloscope.
   

   
   
   
   
   

   Text in Illustration

   *a

   Component with harness connected (ECM)

   -

   -

   
   

   OK:

   
   

   Tester Connection	Condition	Specified Condition
   C149-6 (#1D+) - C149-7 (#1D-)	Cranking	Correct waveform is as shown
   C149-1 (#2D+) - C149-2 (#2D-)	Cranking	Correct waveform is as shown
   C150-7 (#3D+) - C150-6 (#3D-)	Cranking	Correct waveform is as shown
   C150-5 (#4D+) - C150-4 (#4D-)	Cranking	Correct waveform is as shown

4. Reconnect the injector assembly connectors for all cylinders.
   

1. Replace the ECM (LandCruiser RM0000013Z002DX.html).
   

1. Repair or replace the harness or connector.
   

1. Connect the GTS to the DLC3.
   

2. Clear the DTCs (LandCruiser RM000000PDK1ENX.html).
   

3. Turn the engine switch off for 30 seconds or more.
   

4. Start the engine and idle it for 10 seconds.
   

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

6. Confirm that the DTC is not output again.