Door Control Transmitter (W/ Smart Key System) Inspection

Inspect operation of the transmitter.

1. Remove the battery (lithium battery) from the transmitter (COROLLA_ZRE142 RM000001P7R02YX.html).
   





2. Install a new or normal battery (lithium battery).
   

   HINT:

   If a new or normal battery is not available, first connect 2 new 1.5 V batteries in series. Then connect leads to the batteries and apply 3 V to the transmitter, as shown in the illustration.

3. From outside the vehicle, approximately 1 m (3.28 ft.) away from the driver side outside door handle, test the transmitter by pointing its key plate at the vehicle and pressing a transmitter switch.
   

   OK:

   The door lock can be operated via the transmitter.
   

   The LED comes on more than once.
   

   1. The operational area differs depending on the user, the way the transmitter is held, and the location.
      
   2. The transmitter's weak radio waves may be affected if the area has strong electric waves or noise. The transmitter's operation area may be shortened or the transmitter may not function.
      

Inspect the battery capacity.

1. Remove the battery from the electrical key transmitter that does not operate. Attach a lead wire (0.6 mm (0.0236 in.) in diameter or less including wire sheath) with tape or equivalent to the negative terminal (COROLLA_ZRE142 RM000001P7R02YX.html).
   

   NOTICE:

   Do not wrap the lead wire around a terminal, wedge it between the terminals, or solder it. A terminal may be deformed or damaged, and the battery will not be able to be installed correctly.





2. Carefully pull the lead wire out from the position shown in the illustration and install the previously removed transmitter battery.
   





3. Using an oscilloscope, check the transmitter battery voltage waveform.
   

   HINT:

   When measuring the battery voltage, while operating the lock switch of a door handle, bring the electrical key transmitter within the entry operating range to perform the measurement. For the entry operating range, refer to SYSTEM DESCRIPTION (COROLLA_ZRE142 RM000000XUC09JX.html).

   Standard voltage:

   Item	Content
   Tester Connection	Battery positive (+) - Battery negative (-)
   Tool Setting	0.5 V/DIV., 100 ms/DIV.
   Condition	Engine switch OFF, all doors closed and lock switch pushed
   Specified Condition	2.2 to 3.2 V (Refer to the waveform)

   If the result is not as specified, replace the transmitter battery.