Dtc P0037 Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 2). 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

INSPECT HEATED OXYGEN SENSOR (HEATER RESISTANCE)

CHECK HEATED OXYGEN SENSOR (POWER SOURCE)

CHECK HARNESS AND CONNECTOR (HEATED OXYGEN SENSOR - ECM)

INSPECT FUSE (EFI NO. 2 FUSE)

DTC P0037 Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 2)

DTC P0038 Oxygen Sensor Heater Control Circuit High (Bank 1 Sensor 2)


DESCRIPTION

  1. Refer to DTC P0136 (See page Нажмите здесь).

УКАЗАНИЕ:
  1. Sensor 2 refers to the sensor mounted behind the three way catalytic converter and located far from the engine assembly.

  2. When any of these DTCs are set, the ECM enters fail-safe mode. The ECM turns off the heated oxygen sensor heater in fail-safe mode. Fail-safe mode continues until the ignition switch is turned off.


    COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Система Управления Двигателем 2Zr-Fe.Система Sfi. Dtc P0037 Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 2)


DTC No.
DTC Detection Condition
Trouble Area
P0037
Heated oxygen sensor heater current is below 0.3 A when heater operates with +B greater than 11.5 V
(1-trip detection logic)
  1. Open in heated oxygen sensor heater circuit
  2. Heated oxygen sensor heater (sensor 2)
  3. Integration relay (EFI MAIN relay)
  4. ECM
P0038
Heated oxygen sensor heater current exceeds 2 A when heater operates
(1-trip detection logic)
  1. Short in heated oxygen sensor heater circuit
  2. Heated oxygen sensor heater (sensor 2)
  3. Integration relay (EFI MAIN relay)
  4. ECM

WIRING DIAGRAM

Refer to DTC P2195 (See page Нажмите здесь).

INSPECTION PROCEDURE

УКАЗАНИЕ:
Read freeze frame data using the intelligent tester. 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.
1.INSPECT HEATED OXYGEN SENSOR (HEATER RESISTANCE)


    COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Система Управления Двигателем 2Zr-Fe.Система Sfi. Dtc P0037 Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 2)

  1. Disconnect the heated oxygen sensor connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    B24-1 (HT1B) - B24-2 (+B)
    		20°C (68°F)
    		11 to 16 Ω
    B24-1 (HT1B) - B24-4 (E2)
    		Always
    		10 kΩ or higher

  1. Reconnect the heated oxygen sensor connector.



NG
REPLACE HEATED OXYGEN SENSOR (Нажмите здесь)
OK


2.CHECK HEATED OXYGEN SENSOR (POWER SOURCE)


    COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Система Управления Двигателем 2Zr-Fe.Система Sfi. Dtc P0037 Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 2)

  1. Disconnect the heated oxygen sensor connector.

  1. Turn the ignition switch on (IG).

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

    Standard voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    B24-2 (+B) - Body ground
    		Ignition switch on (IG)
    		9 to 14 V

  1. Reconnect the heated oxygen sensor connector.



NG
Перейдите к шагу 4
OK


3.CHECK HARNESS AND CONNECTOR (HEATED OXYGEN SENSOR - ECM)


    COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Система Управления Двигателем 2Zr-Fe.Система Sfi. Dtc P0037 Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 2)

  1. Disconnect the heated oxygen 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
    B24-1 (HT1B) - B31-47 (HT1B)
    		Always
    		Below 1 Ω
    Standard resistance (Check for short):
    Tester Connection
    		Condition
    		Specified Condition
    B24-1 (HT1B) or B31-47 (HT1B) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the heated oxygen sensor connector.

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (HEATED OXYGEN SENSOR - ECM)
OK

REPLACE ECM (Нажмите здесь)

4.INSPECT FUSE (EFI NO. 2 FUSE)


    COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Система Управления Двигателем 2Zr-Fe.Система Sfi. Dtc P0037 Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 2)

  1. Remove the EFI No. 2 fuse from the engine room relay block.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    EFI No. 2 fuse
    		Always
    		Below 1 Ω

  1. Reinstall the EFI No. 2 fuse.



NG
REPLACE FUSE (EFI NO. 2 FUSE)
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (HEATED OXYGEN SENSOR - INTEGRATION RELAY (EFI MAIN RELAY))