Dtc P2237 Oxygen (A/F) Sensor Pumping Current Circuit / Open (Bank 1 Sensor 1)

Engine Hybrid System. Land Cruiser. Urj200, 202 Grj200 Vdj200
1Vd-Ftv Engine Control. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - ECM)

REPLACE AIR FUEL RATIO SENSOR

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

REPLACE ECM

REPAIR OR REPLACE HARNESS OR CONNECTOR

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

DTC P2237 Oxygen (A/F) Sensor Pumping Current Circuit / Open (Bank 1 Sensor 1)

DTC P2238 Oxygen (A/F) Sensor Pumping Current Circuit Low (Bank 1 Sensor 1)

DTC P2239 Oxygen (A/F) Sensor Pumping Current Circuit High (Bank 1 Sensor 1)

DTC P2240 Oxygen (A/F) Sensor Pumping Current Circuit / Open (Bank 2 Sensor 1)

DTC P2241 Oxygen (A/F) Sensor Pumping Current Circuit Low (Bank 2 Sensor 1)

DTC P2242 Oxygen (A/F) Sensor Pumping Current Circuit High (Bank 2 Sensor 1)

DTC P2252 Oxygen (A/F) Sensor Reference Ground Circuit Low (Bank 1 Sensor 1)

DTC P2253 Oxygen (A/F) Sensor Reference Ground Circuit High (Bank 1 Sensor 1)

DTC P2255 Oxygen (A/F) Sensor Reference Ground Circuit Low (Bank 2 Sensor 1)

DTC P2256 Oxygen (A/F) Sensor Reference Ground Circuit High (Bank 2 Sensor 1)


DESCRIPTION

HINT:
  1. For more information on the air fuel ratio sensor and Diesel Particulate Filter (DPF), refer to the following procedures (Click here).
  2. If P2237, P2238, P2239, P2240, P2441 or P2442 is present, refer to the DTC table for DPF system (Click here).
  3. These DTCs are recorded when the air fuel ratio sensor has a malfunction, although the title says oxygen sensor.
The air fuel ratio sensor has the characteristic of providing output voltage which is proportional to the air-fuel ratio. The air fuel ratio sensor output voltage* is used by the ECM to control the air-fuel ratio.
The air fuel ratio sensor is located after the DPF catalytic converter. This sensor has been developed based on the structure and technology of a sensor that is used for gasoline engines. The cover portion of the sensor has been changed for use in the diesel engine with DPF in order to eliminate the influence of the sensor temperature and particulate matter (PM).
In order to reduce PM, the ECM adjusts the air-fuel ratio to a slightly rich value (but it is lean compared with the stoichiometric air-fuel ratio) based on signals from the air fuel ratio sensor. When the ECM performs PM forced regeneration using adding fuel by the exhaust fuel addition injector, the air-fuel ratio is also properly adjusted using the sensor.
*: The voltage value changes inside the ECM only.

Land Cruiser. Urj200, 202 Grj200 Vdj200.1Vd-Ftv Engine Control.Ecd System (W/ Dpf). Dtc P2237 Oxygen (A/F) Sensor Pumping Current Circuit / Open (Bank 1 Sensor 1)

HINT:
The ECM provides a pulse width modulated control circuit to adjust current through the heater. The air fuel ratio sensor heater circuit uses a relay on the +B side of the circuit.

Land Cruiser. Urj200, 202 Grj200 Vdj200.1Vd-Ftv Engine Control.Ecd System (W/ Dpf). Dtc P2237 Oxygen (A/F) Sensor Pumping Current Circuit / Open (Bank 1 Sensor 1)


P2237 (Bank 1), P2240 (Bank 2)
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
  1. Drive the vehicle at 50 km/h (30 mph) or more for a total of 300 seconds or more.
  2. Check that "Exhaust Temperature B1S1" displays 200°C (392°F) or higher using the GTS.
When either of the following conditions is met (1 trip detection logic):
  1. Air fuel ratio sensor circuit malfunction
  2. The resistance of the air fuel ratio sensor element is 250 Ω or higher for 5 seconds or more.
Main trouble area: Open in air fuel ratio sensor circuit
  1. Open or short in air fuel ratio sensor circuit
  2. Air fuel ratio sensor
  3. ECM

P2238 (Bank 1), P2241 (Bank 2)
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Engine switch on (IG) for 7 seconds
Air fuel ratio sensor (for bank 1, 2) circuit low
(1 trip detection logic)
Main trouble area: Open in air fuel ratio sensor circuit
  1. Open or short in air fuel ratio sensor circuit
  2. Air fuel ratio sensor
  3. ECM

P2239 (Bank 1), P2242 (Bank 2)
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Engine switch on (IG) for 7 seconds
Air fuel ratio sensor (for bank 1, 2) circuit high
(1 trip detection logic)
Main trouble area: Short in air fuel ratio sensor circuit
  1. Open or short in air fuel ratio sensor circuit
  2. Air fuel ratio sensor
  3. ECM

P2252 (Bank 1), P2255 (Bank 2)
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Engine switch on (IG) for 7 seconds
Air fuel ratio sensor (for bank 1, 2) circuit low
(1 trip detection logic)
Main trouble area: Open in air fuel ratio sensor circuit
  1. Open or short in air fuel ratio sensor circuit
  2. Air fuel ratio sensor
  3. ECM

P2253 (Bank 1), P2256 (Bank 2)
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Engine switch on (IG) for 7 seconds
Air fuel ratio sensor (for bank 1, 2) circuit high
(1 trip detection logic)
Main trouble area: Short in air fuel ratio sensor circuit
  1. Open or short in air fuel ratio sensor circuit
  2. Air fuel ratio sensor
  3. ECM

Related Data List
DTC No.
Data List
P2237
P2238
P2239
P2252
P2253
  1. AFS Voltage B1S1
  2. Exhaust Temperature B1S1
P2240
P2241
P2242
P2255
P2256
  1. AFS Voltage B2S1
  2. Exhaust Temperature B2S1

MONITOR DESCRIPTION

The air fuel ratio sensor outputs a voltage in proportion to the air-fuel ratio. If impedance (alternating current resistance) or voltage output of the sensor deviates greatly from the standard range, the ECM interprets this as an open or short malfunction of the air fuel ratio sensor circuit.

WIRING DIAGRAM

Refer to DTC P0031 (Click here).

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 (Click here) and initialization (Click here).
  3. After replacing the fuel supply pump assembly, the ECM needs initialization (Click here).
  4. After replacing an injector assembly, the ECM needs registration (Click here).
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.CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - ECM)

  1. Disconnect the air fuel ratio sensor connector.

  1. Disconnect the ECM connector.

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

    Standard Resistance:

    for LHD
    Tester Connection
    		Condition
    		Specified Condition
    C159-3 (AF1+) - C45-102 (A1A+)
    		Always
    		Below 1 Ω
    C159-4 (AF1-) - C45-103 (A1A-)
    		Always
    		Below 1 Ω
    C158-3 (AF2+) - C45-125 (A2A+)
    		Always
    		Below 1 Ω
    C158-4 (AF2-) - C45-126 (A2A-)
    		Always
    		Below 1 Ω
    C159-3 (AF1+) or C45-102 (A1A+) - Body ground
    		Always
    		10 kΩ or higher
    C159-4 (AF1-) or C45-103 (A1A-) - Body ground
    		Always
    		10 kΩ or higher
    C158-3 (AF2+) or C45-125 (A2A+) - Body ground
    		Always
    		10 kΩ or higher
    C158-4 (AF2-) or C45-126 (A2A-) - Body ground
    		Always
    		10 kΩ or higher

    for RHD
    Tester Connection
    		Condition
    		Specified Condition
    C159-3 (AF1+) - C46-102 (A1A+)
    		Always
    		Below 1 Ω
    C159-4 (AF1-) - C46-103 (A1A-)
    		Always
    		Below 1 Ω
    C158-3 (AF2+) - C46-125 (A2A+)
    		Always
    		Below 1 Ω
    C158-4 (AF2-) - C46-126 (A2A-)
    		Always
    		Below 1 Ω
    C159-3 (AF1+) or C46-102 (A1A+) - Body ground
    		Always
    		10 kΩ or higher
    C159-4 (AF1-) or C46-103 (A1A-) - Body ground
    		Always
    		10 kΩ or higher
    C158-3 (AF2+) or C46-125 (A2A+) - Body ground
    		Always
    		10 kΩ or higher
    C158-4 (AF2-) or C46-126 (A2A-) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the air fuel ratio sensor connector.

  1. Reconnect the ECM connector.



NG
Go to step 5
OK


2.REPLACE AIR FUEL RATIO SENSOR
When DTC P2237, P2238, P2239, P2252 or P2253 is output:
  1. Replace the air fuel ratio sensor (for bank 1) (Click here).
When DTC P2240, P2241, P2242, P2255 or P2256 is output:
  1. Replace the air fuel ratio sensor (for bank 2) (Click here).

NEXT


3.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

  1. Warm up the engine.

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the GTS on.

  1. Clear the DTCs (Click here).

  1. Drive the vehicle at 50 km/h (30 mph) or more for a total of 300 seconds or more.

    HINT:
    Make sure that the exhaust gas temperatures (Exhaust Temperature B1S1 and Exhaust Temperature B2S1) are 200°C (392°F) or higher.

  1. Confirm that the DTC is not output again.



NG
Go to step 4
OK

END

4.REPLACE ECM

  1. Replace the ECM (Click here).



NEXT
Go to step 6

5.REPAIR OR REPLACE HARNESS OR CONNECTOR

  1. Repair or replace the harness or connector.


NEXT


6.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

  1. Warm up the engine.

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the GTS on.

  1. Clear the DTCs (Click here).

  1. Drive the vehicle at 50 km/h (30 mph) or more for a total of 300 seconds or more.

    HINT:
    Make sure that the exhaust gas temperatures (Exhaust Temperature B1S1 and Exhaust Temperature B2S1) are 200°C (392°F) or higher.

  1. Confirm that the DTC is not output again.


NEXT

END