Toyota RAV4 (XA40) 2013-2018 Service Manual: 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 ignition key cylinder but a communication error occurs between the key and transponder key ecu, dtc b2798 is output.
Wiring diagram
Inspection procedure
- Read value of intelligent tester (engine immobiliser system)
- Connect the intelligent tester (with can vim) to the dlc3.
- Turn the ignition switch on with a key that cannot start the engine.
- On the intelligent tester, enter the following menus: diagnosis / obd/mobd / immobiliser / data list / immobiliser. Read the result.
Ok: unset (key is in ignition key cylinder) appears on the screen.
- Check whether engine starts with other key
- Check whether the engine starts with the vehicle's other keys.
Ok: engine starts.
- Read value of intelligent tester (transponder key coil)
- Connect the intelligent tester (with can vim) to the dlc3.
- Turn the ignition switch on with a key that cannot start the engine.
- On the intelligent tester, enter the following menus: diagnosis / obd/mobd / immobiliser / data list / antenna coil. Read the result.
Ok: normal (transponder key coil is normal) appears on the screen.
- Check wire harness (transponder key ecu - transponder key amplifier)
- Disconnect the e46 ecu connector.
- Disconnect the e5 amplifier connector.
- Measure the resistance of the wire harness side connectors.
Standard resistance 
- Check transponder key amplifier (operation)
- Temporarily replace the transponder key amplifier with a new or normally functioning one..
- Check that the engine starts normally
Ok: engine starts normally.
End (transponder key amplifier is defective)
Unmatched key code
Description
This dtc is output when a key code that has not been registered in the
transponder key ecu is inserted
into the ignition key cylinder.
Inspection procedure
Reregister key
...
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 ...
Other materials:
Heated steering wheel/seat
heaters/seat ventilators
Heated steering wheel
Warm up the grip of the steering
wheel
Seat heaters
Warm up the seat upholstery
Seat ventilators
Maintain good ventilation by
pulling air through the seat
upholstery
WARNING
â– To prevent minor burn injuries
Care should be taken if anyone in
the following categories ...
Cargo and luggage
Take notice of the following
information about storage
precautions, cargo capacity
and load.
WARNING
â– Things that must not be carried
in the luggage compartment
The following things may cause a
fire if loaded in the luggage compartment:
Receptacles containing gasoline
Aerosol cans
â– Storage p ...
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 communicatio ...
