Wireless Door Lock Control System (W/O Entry And Start System) Only Wireless Control Function Is Inoperative

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK POWER DOOR LOCK OPERATION

CHECK KEY REMINDER WARNING OPERATION

CHECK WIRELESS DOOR CONTROL TRANSMITTER

CHECK TRANSMITTER BATTERY

CHECK FOR ELECTRICAL NOISE

CHECK HARNESS AND CONNECTOR (DOOR CONTROL RECEIVER - MAIN BODY ECU)

CHECK HARNESS AND CONNECTOR (DOOR CONTROL RECEIVER - BATTERY AND BODY GROUND)

CHECK DOOR CONTROL RECEIVER (OUTPUT)

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

1. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
   
2. When replacing the door control receiver, refer to the registration procedures (LandCruiser RM000001WYL02BX.html).
   

1. Check the power door lock operation (LandCruiser RM000002T6K07VX.html).
   

   OK:

   Each door locks and unlocks normally.
   

1. Check the key reminder buzzer operation (LandCruiser RM000002YKT02DX.html).
   

   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.
   

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

   OK:

   Wireless door lock control functions operate normally.
   

1. Remove the battery from the inoperative wireless door control transmitter (LandCruiser RM000003ZV301KX.html).
   

2. Measure the voltage according to the value(s) in the table below.
   

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   Battery positive (+) - Battery negative (-)	Always	2.5 to 3.2 V

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

   HINT:

   Refer to Parts Location for the location of the door control receiver (LandCruiser RM000001WY9022X.html).

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

   OK:

   Wireless door lock control functions operate normally.
   

   HINT:

   1. Check if electrical noise is the cause by moving the door control transmitter closer to the door control receiver. Moving closer will decrease the effects of electrical noise.
      
   2. 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.
      

1. Disconnect the R26 receiver connector.
   

2. Disconnect the G64 ECU connector.
   

3. Measure the resistance according to the value(s) in the table below.
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   R26-2 (RDA) - G64-26 (RDA)	Always	Below 1 Ω
   R26-3 (PRG) - G64-25 (PRG)
   R26-2 (RDA) or G64-26 (RDA) - Body ground	Always	10 kΩ or higher
   R26-3 (PRG) or G64-25 (PRG) - Body ground

1. Disconnect the R26 receiver connector.
   

2. Measure the resistance and voltage according to the value(s) in the table below.
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   R26-1 (GND) - Body ground	Always	Below 1 Ω

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   R26-5 (+B) - Body ground	Always	11 to 14 V

   Text in Illustration

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

1. Using an oscilloscope, check the waveform.
   

   Measurement Condition

   Item	Content
   Tester Connection	R26-2 (RDA) - Body ground
   Tool Setting	10 V/DIV., 50 μs/DIV.
   Condition	No key in ignition key cylinder, all doors closed and transmitter switch off → on

   OK:

   Waveform is output normally (refer to illustration).
   

   Result

   Result	Proceed to
   OK	A
   NG (for 5 Door)	B
   NG (for 3 Door)	C