Wireless Door Lock Control System: Inspection

HINT:

Refer to "WIRELESS DOOR LOCK CONTROL TRANSMITTER BATTERY REPLACEMENT " in

1. Using a screwdriver, remove the screw and cover.
2. Remove the battery (lithium battery).
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.

   Fig 1: Connecting New 1.5 V Batteries In Series, Connecting Battery (+) To Battery Receptacle Side Terminal & Battery (-) To Bottom Terminal, Then Apply 3 V Voltage To Transmitter

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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 the transmitter, and location.
   • As weak wave is used, operation distance might be shortened when noise is detected in strong wave or used frequency.
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 LEXUS 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 screws and cover using a (-) driver.
2. Remove the battery (lithium battery) from the transmitter.
   Fig 2: Removing Battery From Transmitter

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Connect the lead to the (-) terminal of the transmitter and install the battery.
   Fig 3: Installing Battery

   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 

   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 0.8 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 screws.

Connect the positive (+) lead from the ohmmeter to terminal 1 and the negative (-) lead to terminal 2, and measure resistance of approx. 1 kΩ

If resistance is not as specified, replace the buzzer.

Fig 4: Inspecting Wireless Door Lock Buzzer Operation

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

(See  WIRELESS DOOR LOCK BUZZER CIRCUIT  ) 

1. INSPECT WIRELESS DOOR LOCK CONTROL RECEIVER CIRCUIT (See  WIRELESS DOOR LOCK CONTROL RECEIVER CIRCUIT  ) 

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

Fig 5: Inspecting Wireless Door Lock Control Receiver Circuit (Connector Disconnected)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

1. INSPECT WIRELESS DOOR LOCK CONTROL RECEIVER CIRCUIT 

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

If circuit is as specified, replace the receiver.

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