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

Двигатель. COROLLA, AURIS. ZZE150 ZRE151,152 NDE150
Система Управления Двигателем 2Zr-Fe. COROLLA, AURIS. ZZE150 ZRE151,152 NDE150

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

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

REPLACE AIR FUEL RATIO SENSOR

PERFORM CONFIRMATION DRIVING PATTERN

CHECK WHETHER DTC OUTPUT RECURS (DTC P2237, P2238, P2239, P2252 OR P2253)

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 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)


DESCRIPTION

УКАЗАНИЕ:
  1. Although the DTC titles say oxygen sensor, these DTCs relate to the air fuel ratio sensor.
  2. Sensor 1 refers to the sensor mounted in front of the three way catalytic converter and located near the engine assembly.
These DTCs are set when there is an open or short in the air fuel ratio sensor circuit, or if the air fuel ratio sensor output drops. To detect these problems, the voltage of the air fuel ratio sensor is monitored when the ignition switch is turned on (IG), and the admittance (admittance is an electrical term that indicates the ease of flow of current) is checked while driving. If the voltage of the air fuel ratio sensor is between 0.6 V and 4.5 V, it is considered normal. If the voltage is out of the specified range, or the admittance is less than the standard value, the ECM will determine that there is a malfunction in the air fuel ratio sensor. If the same malfunction is detected in next driving cycle, the MIL will be illuminated and a DTC will be stored.
The air fuel ratio sensor, which is located between the exhaust manifold and catalyst, consists of alloyed metal elements and a heater.
Depending on the engine operating conditions, the heater heats the sensor elements to activate them. Battery voltage is applied to the heater, the sensor ground is controlled by the ECM using a duty ratio.
The sensor elements convert the oxygen concentration in the exhaust gas into voltage values to output. Based on the voltage, the ECM determines the air fuel ratio and regulates the fuel injection volume depending on the air fuel ratio and engine operating conditions. The voltage changes between 0.6 V and 4.5 V while the engine is running. If the air fuel ratio is lean, which means the oxygen concentration in the exhaust gas is high, the voltage is high. If the air fuel ratio is rich, which means the oxygen concentration in the exhaust gas is low, the voltage is low.

COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Система Управления Двигателем 2Zr-Fe.Система Sfi. Dtc P2237 Oxygen (A/F) Sensor Pumping Current Circuit / Open (Bank 1 Sensor 1)


COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Система Управления Двигателем 2Zr-Fe.Система Sfi. Dtc P2237 Oxygen (A/F) Sensor Pumping Current Circuit / Open (Bank 1 Sensor 1)


DTC No.
DTC Detection Condition
Trouble Area
P2237
Open in circuit between terminals A1A+ and A1A- of air fuel ratio sensor while engine running
(2 trip detection logic)
  1. Open or short in air fuel ratio sensor (sensor 1) circuit
  2. Air fuel ratio sensor (sensor 1)
  3. ECM
P2238
Any of following conditions met
(2 trip detection logic):
  1. Air fuel ratio sensor output drops while engine running
  1. Voltage at terminal A1A+ 0.5 V or less
  1. Voltage difference between terminals A1A+ and A1A- 0.1 V or less
  1. Open or short in air fuel ratio sensor (sensor 1) circuit
  2. Air fuel ratio sensor (sensor 1)
  3. ECM
P2239
A1A+ voltage more than 4.5 V
(2 trip detection logic)
  1. Open or short in air fuel ratio sensor (sensor 1) circuit
  2. Air fuel ratio sensor (sensor 1)
  3. ECM
P2252
A1A- voltage 0.5 V or less
(2 trip detection logic)
  1. Open or short in air fuel ratio sensor (sensor 1) circuit
  2. Air fuel ratio sensor (sensor 1)
  3. ECM
P2253
A1A- voltage more than 4.5 V
(2 trip detection logic)
  1. Open or short in air fuel ratio sensor (sensor 1) circuit
  2. Air fuel ratio sensor (sensor 1)
  3. ECM

WIRING DIAGRAM

Refer to DTC P2195 (See page Нажмите здесь).

INSPECTION PROCEDURE

УКАЗАНИЕ:
Intelligent tester only:
Malfunctioning areas can be identified by performing the Control the Injection Volume for A/F sensor function provided in the Active Test. The Control the Injection Volume for A/F sensor function can help to determine whether the Air Fuel Ratio (A/F) sensor, Heated Oxygen (HO2) sensor and other potential trouble areas are malfunctioning.
The following instructions describe how to conduct the Control the Injection Volume for A/F sensor operation using the intelligent tester.
  1. Connect the intelligent tester to the DLC3.
  2. Start the engine and turn the tester on.
  3. Warm up the engine at an engine speed of 2500 rpm for approximately 90 seconds.
  4. On the tester, enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F sensor.
  5. Perform the Active Test operation with the engine in an idling condition (press the RIGHT or LEFT button to change the fuel injection volume.)
  6. Monitor the output voltages of the A/F and HO2 sensors (AFS B1 S1 and O2S B1 S2) displayed on the tester.
УКАЗАНИЕ:
  1. The Control the Injection Volume for A/F sensor operation lowers the fuel injection volume by 12.5% or increases the injection volume by 25%.
  2. Each sensor reacts in accordance with increases and decreases in the fuel injection volume.

Tester Display (Sensor)
Injection Volume
Status
Voltage
AFS B1 S1
(A/F)
+25%
Rich
Less than 3.0 V
AFS B1 S1
(A/F)
-12.5%
Lean
More than 3.35 V
O2S B1 S2
(HO2)
+25%
Rich
 More than 0.55 V
O2S B1 S2
(HO2)
-12.5%
Lean
Less than 0.4 V
ПРИМЕЧАНИЕ:
The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds.

Case
A/F Sensor (Sensor 1)
Output Voltage
HO2 Sensor (Sensor 2)
Output Voltage
Main Suspected Trouble Area
1
COROLLA, AURIS. ZZE150 ZRE151,152 NDE150
COROLLA, AURIS. ZZE150 ZRE151,152 NDE150
-
2
COROLLA, AURIS. ZZE150 ZRE151,152 NDE150
COROLLA, AURIS. ZZE150 ZRE151,152 NDE150
  1. Air fuel ratio sensor
  2. Air fuel ratio sensor heater
  3. Air fuel ratio sensor circuit
3
COROLLA, AURIS. ZZE150 ZRE151,152 NDE150
COROLLA, AURIS. ZZE150 ZRE151,152 NDE150
  1. Heated oxygen sensor
  2. Heated oxygen sensor heater
  3. Heated oxygen sensor circuit
  4. Exhaust gas leakage
4
COROLLA, AURIS. ZZE150 ZRE151,152 NDE150
COROLLA, AURIS. ZZE150 ZRE151,152 NDE150
  1. Fuel pressure
  2. Exhaust gas leakage
    (Air fuel ratio extremely lean or rich)
  1. Following the Control the Injection Volume for A/F sensor procedure enables technicians to check and graph the voltage outputs of both the A/F and HO2 sensors.
  2. To display the graph, enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor / A/F Control System / AFS B1 S1 and O2S B1 S2.
УКАЗАНИЕ:
  1. Read freeze frame data using an intelligent tester. 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.
1.CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - ECM)


    COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Система Управления Двигателем 2Zr-Fe.Система Sfi. Dtc P2237 Oxygen (A/F) Sensor Pumping Current Circuit / Open (Bank 1 Sensor 1)

  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 (Check for open):
    Tester Connection
    		Condition
    		Specified Condition
    B89-3 (A1A+) - B31-112 (A1A+)
    		Always
    		Below 1 Ω
    B89-4 (A1A-) - B31-113 (A1A-)
    		Always
    		Below 1 Ω
    Standard resistance (Check for short):
    Tester Connection
    		Condition
    		Specified Condition
    B89-3 (A1A+) or B31-112 (A1A+) - Body ground
    		Always
    		10 kΩ or higher
    B89-4 (A1A-) or B31-113 (A1A-) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the ECM connector.



  1. Reconnect the air fuel ratio sensor connector.


    COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Система Управления Двигателем 2Zr-Fe.Система Sfi. Dtc P2237 Oxygen (A/F) Sensor Pumping Current Circuit / Open (Bank 1 Sensor 1)



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.REPLACE AIR FUEL RATIO SENSOR

  1. Replace air fuel ratio sensor (See page Нажмите здесь).


NEXT


3.PERFORM CONFIRMATION DRIVING PATTERN

  1. Connect an intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG).

  1. Turn the tester on.

  1. Switch the ECM from normal mode to check mode (See page Нажмите здесь).

  1. Drive the vehicle referring the Confirmation Driving Pattern (See page Нажмите здесь).


NEXT


4.CHECK WHETHER DTC OUTPUT RECURS (DTC P2237, P2238, P2239, P2252 OR P2253)

  1. Connect an intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG).

  1. Turn the tester on.

  1. Select the following menu items: Powertrain / Engine and ECT / DTC.

  1. Read DTCs (Pending DTCs).

    Result:
    Result
    		Proceed to
    No output
    		A
    P2237, P2238, P2239, P2252 or P2253
    		B


B
REPLACE ECM (Нажмите здесь)
A

END