Toyota RAV4 manuals

Toyota RAV4 Service Manual: System voltage

Toyota RAV4. System voltage


Description

The battery supplies electricity to the ecm even when the ignition switch is in the off position. This power allows the ecm to store data such as dtc history, freeze frame data and fuel trim values. If the battery voltage falls below a minimum level, the memory is cleared and the ecm determines that there is a malfunction in the power supply circuit. When the engine is next started, the ecm illuminates the mil and sets the dtc.

Toyota RAV4. System voltage


Hint:

If dtc p0560 is set, the ecm does not store other dtcs or the data stored in the ecm are partly erased.

Monitor strategy

Toyota RAV4. Monitor strategy


Typical enabling conditions

Toyota RAV4. Typical enabling conditions


Typical malfunction thresholds

Toyota RAV4. Typical malfunction thresholds


Wiring diagram

Toyota RAV4. Wiring diagram


Inspection procedure

Hint:

Read freeze frame data using the 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 fuse (efi main and p/i)

  1. Remove the efi main fuse and p/i fuse from the engine room no. 1 Relay block.
  2. Measure the resistance of the efi main fuse and p/i fuse.

Standard resistance: below 1 


  1. Reinstall the efi main fuse and p/i fuse.



  1. Check harness and connector (ecm - efi main fuse, efi main fuse - battery)

  1. Check the harness and the connector between the efi main fuse and ecm.
  1. Remove the efi main fuse from the engine no. 1 Room relay block.
  2. Disconnect the a9 ecm connector.
  3. Measure the resistance.

Standard resistance (check for open)


Standard resistance (check for short)


  1. Reconnect the ecm connector.
  2. Reinstall the efi main fuse.
  1. Check the harness and the connector between the efi main fuse and battery.
  1. Remove the efi main fuse from the engine room no. 1 Relay block.
  2. Disconnect the positive battery terminal.
  3. Check the resistance.

Toyota RAV4. Check harness and connector (ecm - efi main fuse, efi main fuse - battery)


Standard resistance (check for open)


Standard resistance (check for short)


  1. Reconnect the positive battery terminal.
  2. Reinstall the efi main fuse.



  1. Inspect battery

  1. Check that the battery is not depleted.

Ok: battery is not depleted



  1. Check battery terminal

  1. Check that the battery terminals are not loose or corroded.

Ok: battery terminals are not loose or corroded



  1. Check whether dtc output recurs

  1. Connect the intelligent tester to the dlc3.
  2. Turn the ignition switch on and turn the tester on.
  3. Clear dtcs (see page es-35).
  4. turn the ignition switch off and turn the tester off.
  5. Start the engine and turn the tester on.
  6. Select the following menu items: diagnosis / enhanced obd ii / dtc info / current codes.
  7. Read dtcs.

Toyota RAV4. Check whether dtc output recurs




Battery temperature sensor circuit
Description The battery temperature sensor installed on the battery current sensor detects battery temperature. A thermistor is integrated into the battery temperature sensor, and the ...

Internal control module random access memory (ram) error
Description The ecm continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check ensures that the ecm is ...

Other materials:

Center airbag sensor communication stop mode
Description Wiring diagram Inspection procedure Notice: Turn the ignition switch off before measuring the resistances of the main wire and the branch wire. After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system ...

Diagnostic trouble code chart
Hint: Parameters listed in the chart may be different than your readings depending on the type of instrument and other factors. If any dtcs are displayed during a check mode dtc check, check the circuit for the dtcs listed in the table below. For details of each dtc, refer to the page indica ...

Problem symptoms table (2006/01- )
Hint: Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "suspected area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. R ...

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