Dtc P2431 Secondary Air Injection System Air Flow / Pressure Sensor Circuit Range / Performance Bank1

Engine Hybrid System. Land Cruiser. Urj200, 202 Grj200 Vdj200
1Gr-Fe Engine Control. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (EMISSION CONTROL VALVE SET - ECM)

CHECK TERMINAL VOLTAGE (VC OF EMISSION CONTROL VALVE SET)

REPLACE EMISSION CONTROL VALVE SET

CHECK WHETHER DTC OUTPUT RECURS

DTC P2431 Secondary Air Injection System Air Flow / Pressure Sensor Circuit Range / Performance Bank1

DTC P2432 Secondary Air Injection System Air Flow / Pressure Sensor Circuit Low Bank1

DTC P2433 Secondary Air Injection System Air Flow / Pressure Sensor Circuit High Bank1

DTC P2436 Secondary Air Injection System Air Flow / Pressure Sensor Circuit Range / Performance Bank 2

DTC P2437 Secondary Air Injection System Air Flow / Pressure Sensor Circuit Low Bank 2

DTC P2438 Secondary Air Injection System Air Flow / Pressure Sensor Circuit High Bank 2


DESCRIPTION

Refer to DTC P0412 (Click here).
Refer to DTC P0416 (Click here).

DTC No.
DTC Detection Condition
Trouble Area
P2431
P2436
Pressure sensor indicates a value below 45.6 kPa (342 mmHg), or higher than 135 kPa (1013 mmHg) (2 trip detection logic).
  1. Emission control valve set
  2. Open or short in pressure sensor circuit
  3. ECM
P2432
P2437
While the engine is running, the voltage output of the pressure sensor is below 0.5 V (1 trip detection logic).
  1. Emission control valve set
  2. Open or short in pressure sensor circuit
  3. ECM
P2433
P2438
While the engine is running, the voltage output of the pressure sensor is higher than 4.5 V (1 trip detection logic).
  1. Emission control valve set
  2. Open or short in pressure sensor circuit
  3. ECM

MONITOR DESCRIPTION

Land Cruiser. Urj200, 202 Grj200 Vdj200.1Gr-Fe Engine Control.Sfi System. Dtc P2431 Secondary Air Injection System Air Flow / Pressure Sensor Circuit Range / Performance Bank1
The ECM monitors the pressure in the secondary air passage using the pressure sensor located on the emission control valve set in the secondary air injection system. Using this pressure value, the ECM determines whether the secondary air injection system is malfunctioning or not.
If there is a defect in the sensor or the sensor circuit, the voltage level deviates from the normal operating range. The ECM interprets this deviation as a malfunction in the pressure sensor or circuit and stores a DTC.

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.1Gr-Fe Engine Control.Sfi System. Dtc P2431 Secondary Air Injection System Air Flow / Pressure Sensor Circuit Range / Performance Bank1


INSPECTION PROCEDURE

HINT:
  1. Refer to "Data List / Active Test" [Air Pump Pressure (Absolute) and Air Pump2 Pressure (Absolute)] (Click here).
  2. 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, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
  3. Bank 1 refers to the bank that includes the No. 1 cylinder*.
    *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
  4. Bank 2 refers to the bank that does not include the No. 1 cylinder.
1.CHECK HARNESS AND CONNECTOR (EMISSION CONTROL VALVE SET - ECM)

  1. Disconnect the emission control valve set connector.

  1. Disconnect the ECM connectors.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    C137-3 (AIP) - A38-54 (AIP)
    		Always
    		Below 1 Ω
    C137-2 (VC) - C45-66 (VCV2)
    		Always
    		Below 1 Ω
    C137-4 (E2) - C45-98 (ETHA)
    		Always
    		Below 1 Ω
    C138-3 (AIP2) - A38-53 (AIP2)
    		Always
    		Below 1 Ω
    C138-2 (VC2) - C45-66 (VCV2)
    		Always
    		Below 1 Ω
    C138-4 (E22) - C45-98 (ETHA)
    		Always
    		Below 1 Ω
    C137-3 (AIP) or A38-54 (AIP) - Body ground
    		Always
    		10 kΩ or higher
    C137-2 (VC) or C45-66 (VCV2) - Body ground
    		Always
    		10 kΩ or higher
    C138-3 (AIP2) or A38-53 (AIP2) - Body ground
    		Always
    		10 kΩ or higher
    C138-2 (VC2) or C45-66 (VCV2) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.CHECK TERMINAL VOLTAGE (VC OF EMISSION CONTROL VALVE SET)
Land Cruiser. Urj200, 202 Grj200 Vdj200.1Gr-Fe Engine Control.Sfi System. Dtc P2431 Secondary Air Injection System Air Flow / Pressure Sensor Circuit Range / Performance Bank1

  1. Disconnect the emission control valve set connector.

  1. Turn the ignition switch to ON.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    C137-2 (VC) - C137-4 (E2)
    		Ignition switch ON
    		4.5 to 5.5 V
    C138-2 (VC2) - C138-4 (E22)
    		Ignition switch ON
    		4.5 to 5.5 V
    Text in Illustration
    *A
    		for Bank 1
    *B
    		for Bank 2
    *a
    		Front view of wire harness connector
    (to Emission Control Valve Set)


NG
REPLACE ECM (Click here)
OK


3.REPLACE EMISSION CONTROL VALVE SET

  1. Replace the emission control valve set.

    HINT:
    1. Replace the No. 1 emission control valve set (Click here).
    2. Replace the No. 2 emission control valve set (Click here).

NEXT


4.CHECK WHETHER DTC OUTPUT RECURS

  1. Start the engine and warm it up.

  1. Turn the ignition switch off.

  1. Connect the GTS to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the GTS on.

  1. Clear the DTCs (if stored) (Click here).

  1. Enter the following menus: Powertrain / Engine and ECT / Utility / Secondary Air Injection Check / Automatic Mode.

  1. Start the engine after the GTS initialization is finished.

  1. Perform the System Check operation by pressing ENTER (Next).

  1. Perform the following to confirm the secondary air injection system pending codes: Press the Exit button.

  1. Check for pending DTCs.

    OK:
    No pending DTC is output.

  1. Turn the ignition switch off.

    NOTICE:
    1. When performing the Secondary Air Injection Check operation after the battery cable has been reconnected, wait for 7 minutes with the ignition switch turned to ON or the engine running.
    2. Turn the ignition switch off when the Secondary Air Injection Check operation finishes.


NG
REPLACE ECM (Click here)
OK

END