Toyota RAV4 manuals

Toyota RAV4 Service Manual: Engine coolant temperature circuit range / performance problem

Toyota RAV4 Service Manual / 2Az-fe engine mechanical / Sfi system / Diagnostic trouble code chart / Engine coolant temperature circuit range / performance problem

Toyota RAV4. Engine coolant temperature circuit range / performance problem


Description

Refer to dtc p0115 (see page es-105).

Toyota RAV4. Engine coolant temperature circuit range / performance problem


Monitor description

Engine coolant temperature (ect) sensor cold start monitor

When a cold engine start is performed and then the engine is warmed up, if the ect sensor value does not change, it is determined that a malfunction has occurred. If this is detected in 2 consecutive driving cycles, the mil is illuminated and a dtc is set.

Ect sensor soak monitor

After a warmed up engine is started, if the ect sensor value does not change when the engine is stopped and then the next cold engine start is performed, it is determined that a malfunction has occurred. If this is detected in 2 consecutive driving cycles, the mil is illuminated and a dtc is set.

Monitor strategy

Toyota RAV4. Monitor strategy


Typical enabling conditions

Toyota RAV4. Typical enabling conditions


Toyota RAV4. Typical enabling conditions


typical malfunction thresholds

Toyota RAV4. typical malfunction thresholds


Component operating range

Toyota RAV4. Component operating range


Inspection procedure

Hint:

  1. Check any other dtcs output (in addition to dtc p0116)

  1. Connect the intelligent tester to the dlc3.
  2. Turn the ignition switch on.
  3. Turn the tester on.
  4. Select the following menu items: diagnosis / enhanced ii / dtc info / current codes.
  5. Read the dtc.

Toyota RAV4. Check any other dtcs output (in addition to dtc p0116)


  1. Inspect thermostat

  1. Remove the thermostat (see page co-15).
  2. Measure the valve opening temperature of the thermostat.

Standard value: 80°c to 84°c (176°f to 183°f)

Hint:

In addition to the above check, confirm that the valve is completely closed when the temperature is below the standard.

  1. Reinstall the thermostat (see page co-15).

 


Engine coolant temperature circuit
Description A thermistor, whose resistance value varies according to the ect, is built into the engine coolant temperature (ect) sensor. The structure of the sensor and its connection to th ...

Throttle / pedal position sensor / switch "A"
Hint: These dtcs relate to the throttle position (tp) sensor. Description The tp sensor is mounted on the throttle body, and detects the opening angle of the throttle valve. This sensor is a ...

Other materials:

Operation check
Check key reminder warning system Check that the key reminder warning buzzer sounds. With the driver side door closed, insert the key into the ignition key cylinder and then turn the ignition switch to lock or acc. Check that the buzzer sounds intermittently when the driver ...

Fail-safe chart
Fail-safe chart This function minimizes the loss of the ect functions when a malfunction occurs in a sensor or solenoid. Automatic transmission fluid (atf) temperature sensor: when the atf temperature sensor has a malfunction, o/d up-shift is prohibited Counter gear speed sensor n ...

Removal
Drain engine coolant (see page co-6) Disconnect cable from negative battery terminal Caution: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation. Remove no. 1 Engine cover Remove ...

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