Section 446 (Wireless Door Lock Control System): Inspection

1. Start up diagnosis mode.

   HINT:

   This mode is to check the condition of the signal transmission and reception among the transmitter, the tuner and ECU.

   If all the transmitters that the customer has give no response, there is a possibility that the tuner or the wire harness is faulty.

   1. Insert the ignition key into the ignition key cylinder.
   2. Remove the ignition key from the ignition key cylinder.
   3. Insert the key into the ignition switch.
   4. Turn the ignition switch ON once within 5 sec.
   5. Repeat turning the ignition switch OFF --> ON 9 times within 30 sec.
   6. Enter the diagnosis mode, and make sure that the buzzer sounds.
      Fig 1: Wireless Door Lock Diagnosis Mode

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Finishing the Diagnosis Mode.

   During the Diagnosis mode, turn the ignition switch OFF --> ON to go back to the normal mode.

   At this time make sure that the buzzer sounds.

3. Diagnosis Mode Check.

   HINT:

   Check how the buzzer sounds when pressing each transmitter switch.

   1. LOCK switch
   2. UNLOCK switch
   3. TRUNK switch
   4. Disagreement of recognition code or rolling code.

      HINT:

      If (4) is detected in the Diagnosis Check, conduct the recognition code registration.

   5. No response from the buzzer.

      HINT:

      Conduct the following checks.

      • Check the wireless door lock transmitter.
      • Check the wireless door lock receiver.
      • Check the wire harness between door lock tuner and theft deterrent ECU

HINT:

Refer to "Wireless door lock control receiver and transmitter replacement".

1. Using a screwdriver, remove the screw and cover.
2. Remove the battery (lithium battery).
   Fig 2: Wireless Door Lock Transmitter Blinking Pattern

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Install a new or normal battery (lithium battery).

   HINT:

   When a new or normal battery can not be obtained, connect 2 new 1.5 V batteries in series, connect the battery (+) to the battery receptacle side terminal and battery (-) to the bottom terminal, then apply 3 V voltage to the transmitter.

4. In the location where is approx. 1 M away from driver's outside handle in the right direction, face the key plate of the transmitter to the vehicle, and check the transmitter operation when pressing transmission switch on the side of the transmitter body.

   Standard: 

   • Remote control of vehicle door lock can be operated. 
   • LED lights up more than once. 

   HINT:

   • The minimum operation distance differs according to operator, the way of holding, and location.
   • As weak wave is used, operation distance might be shortened when noise is detected in strong wave or used frequency.
     Fig 3: Installing Normal Battery

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Install the battery (lithium battery).
6. Install a cover so that O-ring is not distorted or slipped off.
7. Using a screwdriver, tighten the screw.

HINT:

• Make sure to use the TOYOTA electrical tester.
• With the battery unloaded, judge can not be made whether the battery is available or not on the test.
• When the transmitter is faulty, the energy amount left in the battery might not be checked correctly.
• On the lithium battery used for the transmitter, the voltage more than 2.5 V with the battery unloaded is shown on the tester until the energy is completely consumed.

  Accordingly when inspecting the energy amount left in the battery, it is necessary to measure the voltage when the battery is loaded. (1.2 kΩ).

1. Remove the 2 screws and cover using a (-) driver.
2. Remove the battery (lithium battery) from the transmitter.
3. Connect the lead to the (-) terminal of the transmitter and install the battery.
   Fig 4: Removing Battery (Lithium Battery) From Transmitter

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Connect the (+) tester to the (+) battery (lithium battery), and (-) tester to the lead respectively.
5. Press one of the transmitting switches on the transmitter for approx. 1 second.
6. Press the transmitting switch on the transmitter again to check the voltage.

   Standard: 2.1 V or more 

   Fig 5: Connecting (+) Tester To (+) Battery, And (-) Tester To Lead

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   • When the temperature of the battery is low, the judge can not be made correctly.

     When the outcome of the test is less than 2.1 V, conduct the test again after leaving the battery in the place, at 18 °C for more than 30 minutes.

   • By auto power off function, the voltage becomes no load voltage (more than 2.5 V) condition 20 seconds after the switch was pressed.

     Make sure to read the voltage before of it.

   • High voltage might be shown 1 to 2 times after leaving the battery, judge should be made with the voltage shown at the 3rd time or later.
7. Disconnect the lead.
8. Set the battery (lithium battery) in the transmitter.
9. Install the cover, so that the O-ring is not distorted or slipped off.
10. Using a screwdriver, tighten the 2 screws.

Disconnect the connector from the tuner and inspect the connector on the wire harness side, as shown.

Fig 6: Identifying Wireless Door Lock Control Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the circuit is not as specified, inspect the circuit connected to other parts.

Connect the wire harness side connector to the receiver and inspect the wire harness side connecter from the back shown.

Fig 7: Identifying Wireless Door Lock Control Receiver Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If resistance is not as specified, replace the buzzer.

Fig 8: Identifying Wireless Door Lock Buzzer Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If resistance is not as specified, replace the switch.

Inspect continuity between terminal land 2.

Fig 9: Inspecting Wireless Buzzer Volume And On/Off Switch Continuity

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If resistance is not as specified, replace the switch.