Wireless Door Lock Control System - Diagnostics: Pre-Check
Only wireless function (Remote control) will not operate. (If a new transmitter or a transmitter of the same type that works properly with the vehicle is not available.)
- Inspect wireless door lock transmitter operation
.
- Using a screwdriver, remove the screw and cover.
- Remove the battery (lithium battery).
- Install a new or normal battery (lithium battery).NOTE: When a new or normal battery is not available, 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 to the transmitter.
- In the location which is approximately 1 M away from the driver's outside handle in the right direction, check the transmitter operation by pressing the transmission switch on the surface of the transmitter body.
Standard: Remote control of vehicle door lock can be operated.
NOTE:- The minimum operation distance varies according to an operator, the way of holding and location.
- As weak electric wave is used, when there is strong wave or noise in the used frequency, operation distance might be shortened.
- Install the battery (lithium battery).
- Install a cover so that the O-ring is not distorted or slipped off.
- Using a screwdriver, tighten the screw.
- Check battery capacity
.NOTE:
- Make sure to use the TOYOTA electrical tester.
- With the battery unloaded, whether the battery is available or not cannot be determined on the test.
- When the transmitter is faulty, the remaining battery capacity might not be checked correctly.
- On the lithium battery used for the transmitter, the voltage at more than 2.5 V with the battery unloaded is shown on the tester until the battery is completely consumed.
Accordingly when inspecting the remaining battery capacity in the battery, it is necessary to measure the voltage with the battery loaded (1.2 kΩ).
- Remove the cover by using a screwdriver.
- Remove the battery (lithium battery) from the transmitter.
- Connect the lead to the (-) terminal of the transmitter and install the battery.
- Connect the (+) tester to the (+) battery (lithium battery), and (-) tester to the lead respectively.
- Press one of the transmitting switches on the transmitter for approximately 1 second.
- Press the transmitting switch on the transmitter again to check the voltage.
Standard: 2.1 V or more
NOTE:- If the temperature of the battery is low, the precise measurement is impossible.
If the test result indicates less than 2.1 V, conduct the test again after leaving the battery on the place where its surrounding temperature is at 18° C for more than 30 minutes.
- By auto power off function, the voltage becomes no load (more than 2.5 V) in 20 seconds after the switch was pressed. So be sure to read the voltage before 20 seconds.
- As high voltage might be shown once or twice after leaving the battery, a judgement should be made with the voltage shown from 3rd time onward.
- If the temperature of the battery is low, the precise measurement is impossible.
- Disconnect the lead.
- Set the battery (lithium battery) in the transmitter.
- Install the cover so that the O-ring is not distorted or slipped off.
- Inspect wireless door lock ECU circuit
.
- Disconnect the connector from the ECU and inspect the connector on the wire harness side as shown in Fig 10.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the circuit is not as specified, inspect the other circuit connected to other parts.
- Connect the wire harness side connector to the ECU and inspect the wire harness side connector from the back side as shown in Fig 12.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the circuit is as specified, replace the ECU.
If the circuit is not as specified, inspect the other circuit connected to other parts.
- Disconnect the connector from the ECU and inspect the connector on the wire harness side as shown in Fig 10.
- Replace transmitter (lithium) battery
.CAUTION: Special caution should be taken when handling each component, as they are precision electronic components.
- Using a screwdriver, remove the cover.
CAUTION: Do not pry out the cover forcibly.NOTE: Push the cover with a finger as shown in Fig 13 so that there makes a clearance, then pry out the cover from that clearance.
- Remove the transmitter.
- Remove the battery (lithium battery).CAUTION:
- Do not push the terminals with a finger.
- If prying out the battery (lithium battery) forcibly to remove it, the terminals will be deformed.
- Install a battery (lithium battery) as shown in Fig 14.
CAUTION: Face the battery upward. Take care not to deform the terminals.
- Assemble the transmitter to the key plate and cover.
- Using a screwdriver, remove the cover.
- Replace door lock ECU and transmitter
.CAUTION: When replacing the door lock ECU and transmitter, registration of recognition code is necessary, because they are provided as a single component.
- Select which operation mode should be performed out of the following modes.
- Add mode
- Rewrite mode
- Prohibition mode
- Confirmation mode
NOTE:- The add mode is used to retain codes which are already registered when you register new recognition codes. This mode is used when adding a transmitter. If the number of registered codes exceeds 4 old registered codes are erased one by one in the order of code being registered.
- The rewrite mode is used to erase all registered codes and register only new recognition codes.
- The prohibition mode is used to erase all registered codes and cancels the wireless door lock function. Use this mode when the transmitter is lost.
- The confirmation mode to confirm how many recognition codes are already registered before you register additional recognition codes.
- Follow the chart in Fig 15, Fig 16 and Fig 17 to register the transmitter recognition code at the wireless door lock ECU.NOTE:
- When procedure is not as specified, the operation returns to normal.
- Maximum 4 recognition codes can be registered.
- Select which operation mode should be performed out of the following modes.