Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Cylinder 1 Injector "B" Circuit Open (P21CF13,P21D013-P21D413)

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual / Engine & Hybrid System / 2gr-fks (engine Control) / Sfi System / Cylinder 1 Injector "B" Circuit Open (P21CF13,P21D013-P21D413)

DESCRIPTION

The D-4S system has two injection systems. One is an in-cylinder direct injection system that directly injects pressurized fuel into the combustion chamber. The other is an intake port injection system. The ECM determines the percentage of direct injection and port injection necessary in accordance with the engine speed and load.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P21CF13

Cylinder 1 Injector "B" Circuit Open

Current is not applied to the injector 10 times or more with the engine running (1 trip detection logic).
  • Open or short in fuel injector assembly (for port injection) circuit
  • Fuel injector assembly (for port injection)
  • Semiconductor pwr integration ECU
  • ECM

Comes on

DTC stored

SAE Code: P21CF

P21D013

Cylinder 2 Injector "B" Circuit Open

Current is not applied to the injector 10 times or more with the engine running (1 trip detection logic).
  • Open or short in fuel injector assembly (for port injection) circuit
  • Fuel injector assembly (for port injection)
  • Semiconductor pwr integration ECU
  • ECM

Comes on

DTC stored

SAE Code: P21D0

P21D113

Cylinder 3 Injector "B" Circuit Open

Current is not applied to the injector 10 times or more with the engine running (1 trip detection logic).
  • Open or short in fuel injector assembly (for port injection) circuit
  • Fuel injector assembly (for port injection)
  • Semiconductor pwr integration ECU
  • ECM

Comes on

DTC stored

SAE Code: P21D1

P21D213

Cylinder 4 Injector "B" Circuit Open

Current is not applied to the injector 10 times or more with the engine running (1 trip detection logic).
  • Open or short in fuel injector assembly (for port injection) circuit
  • Fuel injector assembly (for port injection)
  • Semiconductor pwr integration ECU
  • ECM

Comes on

DTC stored

SAE Code: P21D2

P21D313

Cylinder 5 Injector "B" Circuit Open

Current is not applied to the injector 10 times or more with the engine running (1 trip detection logic).
  • Open or short in fuel injector assembly (for port injection) circuit
  • Fuel injector assembly (for port injection)
  • Semiconductor pwr integration ECU
  • ECM

Comes on

DTC stored

SAE Code: P21D3

P21D413

Cylinder 6 Injector "B" Circuit Open

Current is not applied to the injector 10 times or more with the engine running (1 trip detection logic).
  • Open or short in fuel injector assembly (for port injection) circuit
  • Fuel injector assembly (for port injection)
  • Semiconductor pwr integration ECU
  • ECM

Comes on

DTC stored

SAE Code: P21D4

MONITOR DESCRIPTION

The ECM monitors the injection control of the fuel injector assemblies (for port injection). If a malfunction is detected in a fuel injector assembly (for port injection) circuit, the ECM cancels the injection control for the corresponding cylinder, illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Related DTCs

P21CF: Port injector (cylinder 1) circuit/open

P21D0: Port injector (cylinder 2) circuit/open

P21D1: Port injector (cylinder 3) circuit/open

P21D2: Port injector (cylinder 4) circuit/open

P21D3: Port injector (cylinder 5) circuit/open

P21D4: Port injector (cylinder 6) circuit/open

Required Sensors/Components (Main)

Port injector (cylinder 1 to 6)

Required Sensors/Components (Related)

-

Frequency of Operation

Continuous

Duration

10 times

MIL Operation

Immediate

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever the following DTCs are not stored

None

All of the following conditions are met

-

Battery voltage

8 V or higher

Fuel cut

Off

Synchronous injection

Operating

Engine switch

On (IG)

Either of the following conditions is met

Condition A or B

A. Engine

Running

B. Starter

On

Injection time

Higher than 0 second

TYPICAL MALFUNCTION THRESHOLDS

Confirmed injection signal

No signal

CONFIRMATION DRIVING PATTERN

HINT:

  • After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

    Click here

  • When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

    Click here

  1. Connect the Techstream to the DLC3.
  2. Turn the engine switch on (IG).
  3. Turn the Techstream on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the engine switch off and wait for at least 30 seconds.
  6. Start the engine [A].
  7. Idle the engine for 3 minutes or more [B].
  8. Turn the Techstream on.
  9. Enter the following menus: Powertrain / Engine / Trouble Codes [C].
  10. Read the DTCs [B].

    HINT:

    • If a pending DTC is output, the system is malfunctioning.
    • If a pending DTC is not output, perform the following procedure.
  11. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  12. Input the DTC: P21CF13, P21D013, P21D113, P21D213, P212313 or P212413.
  13. Check the DTC judgment result.

    Techstream Display

    Description

    NORMAL
    • DTC judgment completed
    • System normal

    ABNORMAL
    • DTC judgment completed
    • System abnormal

    INCOMPLETE
    • DTC judgment not completed
    • Perform driving pattern after confirming DTC enabling conditions

    HINT:

    • If the judgment result is NORMAL, the system is normal.
    • If the judgment result is ABNORMAL, the system has a malfunction.
    • If the judgment result is INCOMPLETE, perform steps [B] through [C] again.
    • [A] to [C]: Normal judgment procedure.

      The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

    • When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

HINT:

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE

1.

CHECK DTCS OUTPUT (IN ADDITION TO DTC P21CF13, P21D013, P21D113, P21D213, P21D313 OR P21D413)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Trouble Codes.

(e) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

P21CF13, P21D013, P21D113, P21D213, P21D313 or P21D413 is output

A

P21CF13, P21D013, P21D113, P22D213, P21D313 and P21D413 are output

B
B

GO TO STEP 5

A

2.

CHECK TERMINAL VOLTAGE (POWER SOURCE OF FUEL INJECTOR ASSEMBLY (FOR PORT INJECTION))

*a

Front view of wire harness connector

(to Fuel Injector Assembly (for Port Injection))

(a) Disconnect the fuel injector assembly (for port injection) connector.

(b) Turn the engine switch on (IG).

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

F1-1 - Body ground

Engine switch on (IG)

11 to 14 V

F2-1 - Body ground

Engine switch on (IG)

11 to 14 V

F3-1 - Body ground

Engine switch on (IG)

11 to 14 V

F4-1 - Body ground

Engine switch on (IG)

11 to 14 V

F5-1 - Body ground

Engine switch on (IG)

11 to 14 V

F6-1 - Body ground

Engine switch on (IG)

11 to 14 V
NG

GO TO STEP 5

OK

3.

CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY (FOR PORT INJECTION) - ECM)

(a) Disconnect the ECM connector.

(b) Disconnect the fuel injector assembly (for port injection) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F1-2 - D2-45 (#10)

Always

Below 1 Ω

F2-2 - D2-40 (#60)

Always

Below 1 Ω

F3-2 - D2-41 (#30)

Always

Below 1 Ω

F4-2 - D2-44 (#40)

Always

Below 1 Ω

F5-2 - D2-42 (#50)

Always

Below 1 Ω

F6-2 - D2-43 (#20)

Always

Below 1 Ω

F1-2 or D2-45 (#10) - Body ground and other terminals

Always

10 kΩ or higher

F2-2 or D2-40 (#60) - Body ground and other terminals

Always

10 kΩ or higher

F3-2 or D2-41 (#30) - Body ground and other terminals

Always

10 kΩ or higher

F4-2 or D2-44 (#40) - Body ground and other terminals

Always

10 kΩ or higher

F5-2 or D2-42 (#50) - Body ground and other terminals

Always

10 kΩ or higher

F6-2 or D2-43 (#20) - Body ground and other terminals

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

INSPECT FUEL INJECTOR ASSEMBLY (FOR PORT INJECTION (RESISTANCE))

(a) Inspect the fuel injector assembly (for port injection).

Click here

HINT:

Perform "Inspection After Repair" after replacing the fuel injector assembly (for port injection).

Click here

OK

REPLACE ECM

NG

REPLACE FUEL INJECTOR ASSEMBLY (FOR PORT INJECTION)

5.

CHECK HARNESS AND CONNECTOR (SEMICONDUCTOR PWR INTEGRATION ECU - FUEL INJECTOR ASSEMBLY (FOR PORT INJECTION))

(a) Disconnect the fuel injector assembly (for port injection) connector.

(b) Disconnect the semiconductor pwr integration ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1G-3 - F1-1

Always

Below 1 Ω

1G-3 - F2-1

Always

Below 1 Ω

1G-3 - F3-1

Always

Below 1 Ω

1G-3 - F4-1

Always

Below 1 Ω

1G-3 - F5-1

Always

Below 1 Ω

1G-3 - F6-1

Always

Below 1 Ω

1G-3 or F1-1 - Body ground and other terminals

Always

10 kΩ or higher

1G-3 or F2-1 - Body ground and other terminals

Always

10 kΩ or higher

1G-3 or F3-1 - Body ground and other terminals

Always

10 kΩ or higher

1G-3 or F4-1 - Body ground and other terminals

Always

10 kΩ or higher

1G-3 or F5-1 - Body ground and other terminals

Always

10 kΩ or higher

1G-3 or F6-1 - Body ground and other terminals

Always

10 kΩ or higher
OK

REPLACE SEMICONDUCTOR POWER INTEGRATION ECU

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
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