Dtc P0544 Exhaust Gas Temperature Sensor Circuit (Bank 1 Sensor 1)

Двигатель. Toyota Rav4. Aca30, 33, 38 Ala30
Система Управления Двигателем 2Ad-Fhv. Toyota Rav4. Aca30, 33, 38 Ala30

DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE OF EXHAUST GAS TEMPERATURE SENSOR

CHECK WIRE HARNESS (CHECK FOR OPEN IN WIRE HARNESS)

CHECK WIRE HARNESS (EXHAUST GAS TEMPERATURE SENSOR - ECM)

READ VALUE OF INTELLIGENT TESTER (CHECK FOR SHORT IN WIRE HARNESS)

CHECK WIRE HARNESS (EXHAUST GAS TEMPERATURE SENSOR - ECM)

DTC P0544 Exhaust GAS Temperature Sensor Circuit (Bank 1 Sensor 1)

DTC P0545 Exhaust Gas Temperature Sensor Circuit Low (Bank 1 Sensor 1)

DTC P0546 Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 1)

DTC P2031 Exhaust Gas Temperature Sensor Circuit (Bank 1 Sensor 2)

DTC P2032 Exhaust Gas Temperature Sensor Circuit Low (Bank 1 Sensor 2)

DTC P2033 Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 2)


DESCRIPTION


Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Fhv.Система Ecd. Dtc P0544 Exhaust Gas Temperature Sensor Circuit (Bank 1 Sensor 1)

The exhaust gas temperature sensors are installed before and after the DPNR* catalytic converter to sense the exhaust gas temperature.
A thermistor built into the sensor changes its resistance value according to the exhaust gas temperature. The lower the exhaust gas temperature, the greater the thermistor resistance value. The greater the exhaust gas temperature, the lower the thermistor resistance value.
The exhaust gas temperature sensor is connected to the ECM. The 5 V power source voltage in the ECM is applied to the exhaust gas temperature sensor from terminal THCI (upstream) and THCO (downstream) via resistor R.
The resistor R and the exhaust gas temperature sensor are connected in series. When the resistance value of the exhaust gas temperature sensor changes in accordance with changes in the exhaust gas temperature, the voltage at terminals THCI (upstream) and THCO (downstream) also change. Based on these signals, when DPNR catalyst regeneration is needed, the ECM operates the exhaust fuel addition injector to obtain target upstream temperature of the DPNR catalytic converter as mentioned through sensor 1. In addition, the ECM monitors the rate of DPNR catalytic converter temperature increase using sensor 2.
УКАЗАНИЕ:
*: Diesel Particulate-NOx Reduction system.

DTC No.
DTC Detection Condition
Trouble Area
P0544
Sensor 1 output is less than 0.2 V or more than 4.95 V for 3 seconds or more
(1 trip detection logic)
  1. Open or short in exhaust gas temperature sensor (on upstream) circuit
  2. Exhaust gas temperature sensor (on upstream)
  3. ECM
P0545
Sensor 1 output is less than 0.2 V for 3 seconds or more
(1 trip detection logic)
P0546
Sensor 1 output is more than 4.95 V for 3 seconds or more
(1 trip detection logic)
P2031
Sensor 2 output is less than 0.2 V or more than 4.95 V for 3 seconds or more
(1 trip detection logic)
  1. Open or short in exhaust gas temperature sensor (on downstream) circuit
  2. Exhaust gas temperature sensor (on downstream)
  3. ECM
P2032
Sensor 2 output is less than 0.2 V for 3 seconds or more
(1 trip detection logic)
P2033
Sensor 2 output is more than 4.95 V for 3 seconds or more
(1 trip detection logic)

УКАЗАНИЕ:
  1. DTC P1386 (Exhaust fuel addition injector malfunction) will be present if there is an open malfunction in an exhaust gas temperature sensor circuit.
  2. Sensor 1 represents a sensor located upstream on the DPNR catalytic converter.
  3. Sensor 2 represents a sensor located downstream on the DPNR catalytic converter.
  4. After confirming DTC P0544, P0545, P0546, P2031, P2032, and P2033, check the upstream and downstream exhaust gas temperature in the "Powertrain / Engine and ECT / Initial Exhaust Temp (IN) and Initial Exhaust Temp (OUT)" menu using the intelligent tester.

Reference:
Condition
Exhaust Gas Temperature
Exhaust Gas Temperature Sensor Condition
Idling after warm-up
Constant at 50 to 700°C (122 to 1,292°F)
Normal
0°C (32°F)
Short circuit
1,000°C (1,832°F)
Open circuit

MONITOR DESCRIPTION

The ECM constantly monitors the output voltages from the sensors in order to detect problems with the sensors. When the sensor output voltage deviates from the normal operating range (between 0.2 V and 4.95 V) for more than 3 seconds after the engine is warmed up, the ECM interprets this as malfunction of the sensor circuit, and illuminates the MIL.

WIRING DIAGRAM


Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Fhv.Система Ecd. Dtc P0544 Exhaust Gas Temperature Sensor Circuit (Bank 1 Sensor 1)


INSPECTION PROCEDURE

ПРИМЕЧАНИЕ:
After replacing the ECM, the new ECM needs registration (see page RAV4_ACA30 RM000000TJ4007X.html) and initialization (see page RAV4_ACA30 RM000000TIN007X.html).
1.READ VALUE OF EXHAUST GAS TEMPERATURE SENSOR

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG) and turn the tester ON.

  1. Enter the following menus: Powertrain / Engine and ECT / Initial Exhaust Temp (IN) and Initial Exhaust Temp (OUT).

  1. Read the value.

    OK:
    Same as the actual exhaust gas temperature (50 to 700°C [122 to 1,292°F] during idling after warm-up), and varies after an engine speed of 3,000 rpm is maintained for 1 minute.
    Result:
    Temperature Displayed
    		Proceed to
    1,000°C (1,832°F)
    		A
    0°C (32°F) (After warming up the engine)
    		B
    Same as the actual exhaust gas temperature (50 to 700°C [122 to 1,292°F] during idling after warm-up), and varies after maintaining the engine speed of 3,000 rpm for 1 minute after accelerating the engine from idling to 3,000 rpm
    		C
    УКАЗАНИЕ:
    1. If there is a short circuit, the tester will indicate 0°C (32°F).
    2. If there is an open circuit, the tester will indicate 1,000°C (1,832°F).


B
Перейдите к шагу 4

C
CHECK FOR INTERMITTENT PROBLEMS
A


2.CHECK WIRE HARNESS (CHECK FOR OPEN IN WIRE HARNESS)


    Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Fhv.Система Ecd. Dtc P0544 Exhaust Gas Temperature Sensor Circuit (Bank 1 Sensor 1)

  1. Disconnect the B56 or B57 exhaust gas temperature sensor connector.

  1. Connect terminals 1 and 2 of the exhaust gas temperature sensor wire harness side connector.

  1. Connect the intelligent tester to the DLC 3.

  1. Turn the ignition switch on (IG) and turn the tester ON.

  1. Enter the following menus: Powertrain / Engine and ECT / Initial Exhaust Temp (IN) and Initial Exhaust Temp (OUT).

  1. Read the value.

    Standard value:
    0°C (32°F)

  1. Reconnect the exhaust gas temperature sensor connector.



OK
CONFIRM GOOD CONNECTION TO SENSOR. IF OK, REPLACE EXHAUST GAS TEMPERATURE SENSOR.
NG


3.CHECK WIRE HARNESS (EXHAUST GAS TEMPERATURE SENSOR - ECM)


    Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Fhv.Система Ecd. Dtc P0544 Exhaust Gas Temperature Sensor Circuit (Bank 1 Sensor 1)

  1. Disconnect the B56 or B57 exhaust gas temperature sensor connector.

  1. Disconnect the B32 ECM connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    B56-2 - B32-122 (THCI)
    or
    B57-2 - B32-121 (THCO)
    		Below 1 Ω
    B56-1 - B32-99 (ETCI)
    or
    B57-1 - B32-98 (ETCO)
    		Below 1 Ω

  1. Reconnect the exhaust gas temperature sensor.

  1. Reconnect the ECM connector.



OK
REPAIR OR REPLACE HARNESS AND CONNECTOR
NG

CONFIRM GOOD CONNECTION TO ECM. IF OK, REPLACE ECM.

4.READ VALUE OF INTELLIGENT TESTER (CHECK FOR SHORT IN WIRE HARNESS)


    Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Fhv.Система Ecd. Dtc P0544 Exhaust Gas Temperature Sensor Circuit (Bank 1 Sensor 1)

  1. Disconnect the B56 or B57 exhaust gas temperature sensor connector.

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG) and turn the tester ON.

  1. Enter the following menus: Powertrain / Engine and ECT / Initial Exhaust Temp (IN) and Initial Exhaust Temp (OUT).

  1. Read the value.

    Standard value:
    0°C (32°F)

  1. Reconnect the exhaust gas temperature sensor connector.



OK
REPLACE EXHAUST GAS TEMPERATURE SENSOR
NG


5.CHECK WIRE HARNESS (EXHAUST GAS TEMPERATURE SENSOR - ECM)


    Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Fhv.Система Ecd. Dtc P0544 Exhaust Gas Temperature Sensor Circuit (Bank 1 Sensor 1)

  1. Disconnect the B56 or B57 exhaust gas temperature sensor connector.

  1. Disconnect the B32 ECM connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    B56-2 or B32-122 (THCI) - Body ground
    B56-2 or B32-121 (THCO) - Body ground
    		10 kΩ or higher

  1. Reconnect the exhaust gas temperature sensor connector.

  1. Reconnect the ECM connector.



OK
REPAIR OR REPLACE HARNESS AND CONNECTOR
NG

REPLACE ECM