Only Wireless Control Function is Inoperative: Procedure

1. Check the power door lock operation. Refer to OPERATION CHECK .

   OK

   Each door locks and unlocks normally.

NG → See step   12 

OK: Go to next step 

1. Check the key reminder buzzer operation. Refer to OPERATION CHECK .

   HINT: 

   If the key reminder buzzer is functioning normally, it can be assumed that the unlock warning switch is also functioning normally.

   OK

   Key reminder buzzer operates normally.

NG → See step   13 

OK: Go to next step 

1. Check whether the wireless door lock control functions operate normally with another registered transmitter.

   OK

   Wireless door lock control functions operate normally.

NG → See step   6 

OK: Go to next step 

1. Press and hold the lock switch of the door control transmitter for 5 seconds and check the number of times that the transmitter LED illuminates.
   RESULT
   
   

   Result	Proceed to
   Transmitter LED does not illuminate when switch is pressed and held	A
   Transmitter LED illuminates 3 times or more when switch is pressed and held	B
   Transmitter LED illuminates once or twice but not third time	C

B → REPLACE DOOR CONTROL TRANSMITTER 

C → See step   15 

A: Go to next step 

1. Remove the battery from the door control transmitter that does not operate. Refer to REPLACEMENT .
   Fig 1: Inspecting Transmitter Battery (Voltage)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Attach a lead wire (0.6 mm (0.0236 in.) in diameter or less including wire sheath) with tape or equivalent to the negative terminal.
   NOTE: 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 and install the previously removed transmitter battery.
   NOTE: When replacing the transmitter battery, before starting work, remove any static electricity that has built up by touching, for example, the vehicle to prevent the door control transmitter module set from being damaged.
4. Measure the voltage according to the value(s) in the table below.

   HINT: 

   • Measure the transmitter battery voltage while pressing the lock or unlock switch on the transmitter.
   • Perform the measurement when the door control transmitter is at room temperature.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   Battery positive (+) - Battery negative (-)	Ignition switch off, all doors closed and lock or unlock switch pushed	2.2 to 3.2 V

NG → REPLACE DOOR CONTROL TRANSMITTER 

OK → See step   11 

1. Move the door control transmitter in the vicinity of the door control receiver.

   HINT: 

   Refer to Parts Location for the location of the door control receiver. Refer to PARTS LOCATION .

2. Press and hold either the lock or unlock transmitter switch for 1 second and check that the doors lock or unlock accordingly.

   OK

   Wireless door lock control functions operate normally.

   HINT: 

   • Check if electrical noise is the cause by moving the door control transmitter closer to the door control receiver. Moving it closer will decrease the effects of electrical noise.
   • If the operation check can be performed normally, there is a high probability that electrical noise or a decrease in output from the door control transmitter is the cause of the malfunction. There is a high probability that electrical noise is the cause if the problem occurs only in a certain location or only during a certain time of day. Also, custom components may be causing electrical noise. If custom components are installed in the vehicle, remove them and perform the operation check again.

NG → See step   7 

OK → FIND CAUSE OF ELECTRICAL NOISE AND REMOVE IT 

1. Disconnect the H18 door control receiver connector.
2. Disconnect the C56 main body ECU (multiplex network body ECU) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H18-2 (RDA) - C56-26 (RDA)	Always	Below 1 Ω
   H18-3 (PRG) - C56-25 (PRG)	Always	Below 1 Ω
   H18-2 (RDA) or C56-26 (RDA) - Body ground	Always	10 kΩ or higher
   H18-3 (PRG) or C56-25 (PRG) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the H18 door control receiver connector.
   Fig 2: Checking Door Control Receiver - Battery And Body Ground

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance and voltage according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H18-1 (GND) - Body ground	Always	Below 1 Ω

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   H18-5 (+B) - Body ground	Always	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Door Control Receiver)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Measure the voltage according to the value(s) in the table below.
   Fig 3: Checking Door Control Receiver (Output)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   H18-2 (RDA) - Body ground	Ignition switch off, all doors closed and transmitter switch not pressed	11 to 14 V
   	Ignition switch off, all doors closed and transmitter switch pressed	Pulse generation

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Door Control Receiver)

NG → See step   14 

OK → See step   10