WIRELESS DOOR LOCK CONTROL SYSTEM (w/o Entry and Start System) > Only Wireless Control Function is Inoperative

for Preparation Click here

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

1. When the door control switch on the master switch is operated, check that the locked doors unlock (Click here).
   

OK:

Locked doors unlock.

NG	GO TO POWER DOOR LOCK CONTROL SYSTEM (Click here)

OK

1. Check that the key reminder warning buzzer operates normally (Click here).
   

   OK:

   Key reminder warning buzzer operates normally.
   

NG	GO TO KEY REMINDER WARNING SYSTEM (Click here)

OK

1. When another registered door control transmitter is used, check that the wireless door lock function operates normally.
   

   OK:

   Wireless door control functions operate normally.
   

NG	Go to step 6

OK

1. Check that the transmitter's LED illuminates 3 times when the switch is pressed 3 times.
   

   Result 

   Result	Proceed to
   Transmitter's LED does not illuminate 3 times when switch is pressed 3 times	A
   Transmitter's LED illuminates 3 times when switch is pressed 3 times	B
   The transmitter's LED does not illuminate the second or third time	C

   HINT:

   If the transmitter's LED does not illuminate the second or third time, replace the transmitter battery, which is probably depleted.

B	REPLACE DOOR CONTROL TRANSMITTER MODULE (Click here)
C	REPLACE TRANSMITTER BATTERY (Click here)

A

1. Remove the battery from the door control transmitter module that does not operate. Attach a lead wire (0.6 mm (0.0236 in.)) or less in diameter including wire sheath) with tape or equivalent to the negative terminal (Click here).
   

   NOTICE:

   Do not wrap the lead wire around the terminal, wedge it between terminals, or solder it. The terminal may be deformed or damaged, and the battery will not be able to be installed correctly.

2. Carefully pull the lead wire out from the position shown in the illustration and install the previously removed transmitter battery.
   

3. Using an oscilloscope, check the transmitter battery voltage waveform.
   

HINT:

When measuring the battery voltage, press one of the transmitter switches.

Standard Voltage:

Item	Content
Tester Connection	Battery positive (+) - Battery negative (-)
Tool Setting	0.5 V/DIV., 100 ms/DIV.
Condition	Press one of the transmitter switches
Specified Condition	2.2 to 3.2 V (Refer to the waveform)

NG	REPLACE TRANSMITTER BATTERY (Click here)

OK
REPLACE DOOR CONTROL TRANSMITTER MODULE (Click here)

1. Bring the transmitter near the door control receiver, and perform a wireless operation check.
   

   OK:

   Wireless functions operate normally.
   

   HINT:

   1. When the transmitter is brought near the door control receiver, the possibility of wave interference decreases, and it can be determined if wave interference is causing the problem symptom.
      
   2. If the inspection result is that the problem only occurs in certain locations or times of day, the possibility of wave interference is high. Also, added vehicle components may cause wave interference. If installed, remove them and perform the operation check.
      

NG	AFFECTED BY WAVE INTERFERENCE

OK

1. Switch to self-diagnostic mode by operating the ignition key cylinder.
   

   1. Make sure that the vehicle is in its initial condition. Then insert the key into the ignition key cylinder and remove it.
      

   2. Within 5 seconds of removing the key, insert the key into the ignition key cylinder (ignition switch off). Then turn the ignition switch to ON and off.
      

   3. Within 30 seconds of turning the ignition switch off, perform the following operation 9 times: turn the ignition switch to ON and off.
      

      NOTICE:

      If the system cannot enter self-diagnostic mode, the system returns to normal mode.

      HINT:

      1. Turning the ignition switch to ON after the above operations have been completed ends self-diagnostic mode.
         
      2. Do not lock or unlock doors during self-diagnostic mode.
         

2. Check that the system has switched to self-diagnostic mode by checking the No. 1 room light assembly flash pattern.
   

   OK:

   Flash pattern is same as illustration on left.
   

NEXT

1. Inspect the diagnosis outputs when the door control transmitter switch is held down. The diagnosis outputs can be checked by the flash patterns of the No. 1 room light assembly.
   

   
   
   
   
   

   Result 

   Result	Proceed to
   Normal waves (light flash patterns) for LOCK and UNLOCK switches are output	A
   Unmatching recognition code is output	B
   No diagnosis outputs	C

B	Go to step 9
C	Go to step 10

A
REPLACE MAIN BODY ECU

1. Check that the system can be switched to rewrite mode or add mode, and that a recognition code can be registered.
   

   OK:

   Recognition code can be registered.
   

NG	Go to step 14

OK
END

1. Prepare the door control transmitter from another vehicle.
   

2. Press and hold down the door control transmitter switch.
   

3. Check that an unmatching recognition code is output.
   

OK:

Unmatching recognition code is output.

NG	Go to step 11

OK
REPLACE DOOR CONTROL TRANSMITTER MODULE (Click here)

1. Disconnect the door control receiver connector.
   

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

   Standard Resistance:

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

   Standard Voltage:

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

   Text in Illustration 

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

3. Reconnect the door control receiver connector.
   

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

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

   Standard Voltage:

   Tester Connection	Switch Condition	Specified Condition
   G31-2 (RDA) - Body ground	Transmitter switch off → on (No key in ignition key cylinder, all doors closed)	6 V or higher → Below 1 V → 6 V or higher

   Text in Illustration 

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

NG	REPLACE DOOR CONTROL RECEIVER (Click here)

OK

1. Disconnect the D42 main body ECU connector.
   

2. Disconnect the G31 door control receiver connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   D42-26 (RDA) - G31-2 (RDA)	Always	Below 1 Ω
   D42-26 (RDA) or G31-2 (RDA) - Body ground	Always	10 kΩ or higher
   D42-25 (PRG) - G31-3 (PRG)	Always	Below 1 Ω
   D42-25 (PRG) or G31-3 (PRG) - Body ground	Always	10 kΩ or higher

   Text in Illustration 

   *1	Front view of wire harness connector (to Door Control Receiver)
   *2	Front view of wire harness connector (to Main Body ECU)

4. Reconnect the main body ECU connector and door control receiver connector.
   

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

1. Temporarily replace the door control receiver with a new or normally functioning one (Click here).
   

NEXT

1. Perform the Registration procedures (Click here).
   

NEXT

1. Check that the doors can be locked and unlocked by using the transmitter LOCK and UNLOCK switches.
   

OK:

Doors can be locked and unlocked with transmitter.

NG	REPLACE MAIN BODY ECU

OK
END (DOOR CONTROL RECEIVER IS DEFECTIVE)