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:

Input speed sensor circuit no signal
Description This sensor detects the rotation speed of the turbine, which shows the input revolution of the transaxle. By comparing the input speed signal (nt) with the counter gear speed sensor signal (nc), the ecm detects the shift timing of the gears and controls the engine torque and ...

Second brake piston
Components Disassembly Remove 2nd brake piston return spring sub-assembly Place sst on the return spring and compress. Using a screwdriver, pry out the snap ring. Remove the piston return spring. Inspect 2nd brake piston return spring sub-assembly (see page ax-223) ...

Data list / active tes
Read data list Hint: Using the intelligent tester's data list allows switch, sensor, actuator and other item values to be read without removing any parts. Reading the data list early in troubleshooting is one way to save time. Connect the intelligent tester (with can vim) to the dlc3 ...

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