ECD SYSTEM, Diagnostic DTC:P0201, P0202, P0203, P0204, P1366, P1367, P1368, P1369

DTC Code DTC Name
P0201 Piezoelectric Injection Timing Cylinder 1
P0202 Piezoelectric Injection Timing Cylinder 2
P0203 Piezoelectric Injection Timing Cylinder 3
P0204 Piezoelectric Injection Timing Cylinder 4
P1366 Injector Piezoelectric Voltage / Current / Charge Cylinder 1
P1367 Injector Piezoelectric Voltage / Current / Charge Cylinder 2
P1368 Injector Piezoelectric Voltage / Current / Charge Cylinder 3
P1369 Injector Piezoelectric Voltage / Current / Charge Cylinder 4

DESCRIPTION

The injector injects the amount of the fuel calculated by the ECM into each cylinder.

A piezo-electric actuator, which is built into the injector, has characteristics that allow a fast response when voltage (70 V) is applied. Therefore, fuel injection can be performed quickly and accurately. (Refer to Fig. 1)

When no voltage is applied to the injector, the control piston is pressed to the top due to the force of the return spring. As a result, the fuel pressure values in the control chamber and the needle high pressure chamber become the same, and the needle control piston and injector needle are pressed downward due to the force of the return spring. Therefore, the injection needle is closed to stop fuel injection. (Refer to Fig. 2)

When voltage is applied to the injector, the piezo-electric actuator presses down the control piston. The pressure in the control chamber decreases because the high-pressure fuel in the control chamber is discharged. The fuel pressure in the needle high pressure chamber exceeds the force of the injection needle return spring, and the needle control piston and the injector needle are pressed upward to start fuel injection from the injection port. (Refer to Fig.3)

When voltage being applied to the injector is stopped, the needle control piston and the injector needle are pressed down again to close the injection port and stop fuel injection.

A0136FAE01
DTC No. DTC Detection Condition Trouble Area Possible to Detect
Ignition Switch Engine Run
P0201

Injector circuit fault (Cylinder 1)

(1 trip detection logic)

  • Injector

  • Injector circuit

  • ECM

 ON ON
P0202

Injector circuit fault (Cylinder 2)

(1 trip detection logic)

  • Injector

  • Injector circuit

  • ECM

 ON ON
P0203

Injector circuit fault (Cylinder 3)

(1 trip detection logic)

  • Injector

  • Injector circuit

  • ECM

 ON ON
P0204

Injector circuit fault (Cylinder 4)

(1 trip detection logic)

  • Injector

  • Injector circuit

  • ECM

 ON ON
P1366

Injector circuit fault (Cylinder 1)

(1 trip detection logic)

  • Injector

  • Injector circuit

  • ECM

 ON ON
P1367

Injector circuit fault (Cylinder 2)

(1 trip detection logic)

  • Injector

  • Injector circuit

  • ECM

 ON ON
P1368

Injector circuit fault (Cylinder 3)

(1 trip detection logic)

  • Injector

  • Injector circuit

  • ECM

 ON ON
P1369

Injector circuit fault (Cylinder 4)

(1 trip detection logic)

  • Injector

  • Injector circuit

  • ECM

 ON ON

CAUTION:


  • Do not reuse the injection pipe. Be sure to replace it with a new one.

  • Do not reuse the injection nozzle seat. If the injector has been removed, be sure to replace the injector nozzle seat with a new one.

  • The injector is controlled by a voltage of +/- 70 V.

  • Be sure to connect the injector connectors correctly to prevent malfunctions in the injector.

  • Do not use any power source other than the ECM for the injector.

  • Do not apply voltage to the injector while it is not grounded to body.

  • Do not disassemble the injector.

  • Do not use the ultrasonic cleaning tool to clean the injector.

FAIL-SAFE

DTC No. Trouble Area Possible to Detect
P0201 Stops the malfunctioning injector. Normal condition is restored at the next engine start.
P0202 Stops the malfunctioning injector. Normal condition is restored at the next engine start.
P0203 Stops the malfunctioning injector. Normal condition is restored at the next engine start.
P0204 Stops the malfunctioning injector. Normal condition is restored at the next engine start.
P1366 Stops the malfunctioning injector. Normal condition is restored at the next engine start.
P1367 Stops the malfunctioning injector. Normal condition is restored at the next engine start.
P1368 Stops the malfunctioning injector. Normal condition is restored at the next engine start.
P1369 Stops the malfunctioning injector. Normal condition is restored at the next engine start.

WIRING DIAGRAM

A0138SPE04

INSPECTION PROCEDURE

Tech Tips


  • When DTC P0201, P0202, P0203, P0204 P1366, P1367, P1368 or P1369 is detected, check the injector voltage by selecting the following menu items on the intelligent tester: Powertrain / Engine and ECT / Data List / Inj Volt.

  • If the ECM is replaced, variant coding (variant coding indicates the presence of vehicle accessory items, A/C, etc.) should always be performed Click here.

  • Before removing the ECM and the peripheral parts, wait at least 3 minute after turning the ignition switch off (If the cooling fan is operating, remove the ECM and the peripheral parts after the fan stops.).

PROCEDURE


  1. CHECK INJECTOR


    1. A0138ZUE01

      Disconnect the N1, N2, N3 and N4 injector connectors.

    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Specified Condition
      1 - 2 150 to 250 kΩ

    NG

    REPLACE INJECTOR (S)

    OK

  2. CHECK CONNECTORS (INSTALLATION)


    1. Check the installation condition the ECM and injector connector.

      OK
      The connectors all installed correctly.

    NG

    REPAIR OR REPLACE CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (INJECTOR - ECM)


    1. A0138J3E01

      Disconnect the B54 ECM connector.

    2. Disconnect the N1, N2, N3 and N4 injector connectors.

    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Check for open
      Tester Connection Specified Condition
      #10 (B54-28) - Injector (No.1) (N1-1) Below 1 Ω
      PINJ1 (B54-29) - Injector (No.1) (N1-2) Below 1 Ω
      #20 (B54-25) - Injector (No.2) (N2-1) Below 1 Ω
      PINJ2 (B54-30) - Injector (No.2) (N2-2) Below 1 Ω
      #30 (B54-26) - Injector (No.3) (N3-1) Below 1 Ω
      PINJ3 (B54-32) - Injector (No.3) (N3-2) Below 1 Ω
      #40 (B54-27) - Injector (No.4) (N4-1) Below 1 Ω
      PINJ4 (B54-31) - Injector (No.4) (N4-2) Below 1 Ω
      Check for short
      Tester Connection Specified Condition
      #10 (B54-28) or Injector (No.1) (N1-1) - Body ground 10 kΩ or higher
      PINJ1 (B54-29) or Injector (No.1) (N1-2) - Body ground 10 kΩ or higher
      #20 (B54-25) or Injector (No.2) (N2-1) - Body ground 10 kΩ or higher
      PINJ2 (B54-30) or Injector (No.2) (N2-2) - Body ground 10 kΩ or higher
      #30 (B54-26) or Injector (No.3) (N3-1) - Body ground 10 kΩ or higher
      PINJ3 (B54-32) or Injector (No.3) (N3-2) - Body ground 10 kΩ or higher
      #40 (B54-27) or Injector (No.4) (N4-1) - Body ground 10 kΩ or higher
      PINJ4 (B54-31) or Injector (No.4) (N4-2) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM