Toyota 4Runner: Inspection

INSPECTION

PROCEDURE

1. INSPECT DOOR CONTROL TRANSMITTER MODULE

(a) Inspect the operation of the transmitter.

(1) Remove the battery (lithium battery) from the transmitter (See page ).

(2) Install a new or normal battery (lithium battery). HINT: When 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) 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.

(b) Inspect the battery capacity.

(1) Remove the battery from an transmitter that does not operate (See page ).

(2) Attach a lead wire (0.6 mm (0.0236 in.) or less in diameter including wire sheath) with tape or equivalent to the negative terminal.

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.

(3) Carefully extend the lead wire out from the position shown in the illustration and install the previously removed transmitter battery.

(4) Using an oscilloscope, check the transmitter battery voltage waveform. HINT: Measure the transmitter battery voltage while pressing the lock or unlock switch on the transmitter. Standard Voltage: Tester Connection Tool Setting Condition Specified Condition Battery positive (+) - Battery negative (-) 0.5 V/DIV., 100 ms/DIV. Ignition switch off, all doors closed and lock or unlock switch pushed 2.2 to 3.2 V (Refer to waveform) If the result is not as specified, replace the transmitter battery.