Toyota RAV4 manuals

Toyota RAV4 (XA40) 2013-2018 Service Manual: Communication malfunction no. 1

Toyota RAV4. Communication malfunction no. 1


Description

This dtc is output when a communication error occurs between the transponder key amplifier and transponder key ecu. Some possible reasons for the communication error are: 1) 2 or more ignition keys are positioned too close together, or 2) noise is occurring in the communication line.

Toyota RAV4. Communication malfunction no. 1


Wiring diagram

Toyota RAV4. Communication malfunction no. 1


Inspection procedure

  1. Check key

Toyota RAV4. Check key


  1. Check if the ignition key being used is near other ignition keys. Also, check if the key ring is in contact with the key grip.

Result:




  1. Check for dtc

  1. Separate the keys from each other and / or remove the key ring.
  2. Clear the dtc (see page ei-18).
  3. Insert a key into the ignition key cylinder. Remove it.

    Repeat for all other keys.

  4. Check that no dtc is output.

Ok: no dtc is output.



  1. Check transponder key ecu (noise)

Toyota RAV4. Check transponder key ecu (noise)


  1. Using an oscilloscope or the intelligent tester, check for noise in the waveform between the terminals of the e5 amplifier connector and e46 ecu connector.

Ok: no noise is present (see illustration).




  1. Check wire harness (transponder key ecu - transponder key amplifier)

Toyota RAV4. Check wire harness (transponder key ecu - transponder key amplifier)


  1. Disconnect the e46 ecu connector.
  2. Disconnect the e5 amplifier connector.
  3. Measure the resistance of the wire harness side connectors.

Standard resistance




  1. Check transponder key amplifier (operation)

  1. Temporarily replacing the transponder key amplifier with a new or normally functioning one.
  2. Check that the engine starts normally.

Ok: engine starts.



End (transponder key amplifier is defective)

Communication
Description When a key is inserted into the ignition key cylinder but no communication occurs between the key and transponder key ecu, dtc b2796 is output. When a key is inserted into the ig ...

Engine immobiliser system malfunction
Description This dtc is output when one of the following occurs: 1) the ecm detects errors in its own communications with the transponder key ecu; 2) the ecm detects errors in the communicat ...

Other materials:

Repair
Repair valve seats If the seating is too high on the valve face, use 30° and 45° cutters to correct the seat. If the seating is too low on the valve face, use 75° and 45° cutters to correct the seat. Standard width Lap the valve and valve seat by hand with an abrasiv ...

Reassembly (2006/01- )
Install front drive shaft bearing (for rh) Install the bearing bracket snap ring to the inboard shaft. Using sst and a press, press in the drive shaft bearing to the inboard joint rh. Sst 09527-10011, 09710-04081 Notice: The bearing should be installed completely. Usi ...

Sensor (motor) failure
Description When the sliding roof drive gear (sliding roof ecu) detects the motor's malfunction, and the sliding roof operation is stopped, dtc b2341 is output. When the sliding roof drive gear (sliding roof ecu) detects the gear's malfunction, and the sliding roof operation is stopped, d ...

© 2011-2025 Copyright www.trav4.net