DESCRIPTION

When the entry operation and wireless operation door lock function does not operate, a malfunction or wave interference may be occurring in either of the following: 1) the signal communication line between the door control receiver and certification ECU (smart key ECU assembly) (line is used by entry and wireless); or 2) the door control transmitter.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

(a) Check that the transmitter LED illuminates 3 times when a switch is pressed 3 times.

Result

HINT:

If the transmitter LED does not illuminate the second or third time, replace the transmitter battery as it is depleted.

A

(a) Electrical Key Transmitter:

(1) Remove the battery from the electrical key transmitter that does not operate. 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 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. 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 . Standard Voltage: Tester Connection Tool Setting Condition Specified Condition Battery positive (+) - Battery negative (-) 0.5 V/DIV., 100 ms/DIV. Engine switch off, all doors closed and lock switch pushed 2.5 to 3.2 V (Refer to the waveform)