ENTRY AND START SYSTEM (for Entry Function) > All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate

for Preparation Click here


DESCRIPTION

When the entry functions and wireless door lock functions do not operate, a malfunction or electrical interference may be occurring in either of the following: 1) signal communication line between the door control receiver and certification ECU (the line that is used for entry and wireless functions); or 2) electrical key transmitter.

WIRING DIAGRAM


B211013E01


INSPECTION PROCEDURE

NOTICE:
  1. The entry and start system (for entry function) uses a multiplex communication system (LIN communication system) and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting (Click here). Troubleshoot the entry and start system (for entry function) after confirming that the communication system is functioning properly.
  2. When using the intelligent tester with the engine switch off to troubleshoot: Connect the intelligent tester to the DLC3, and turn a courtesy light switch on and off at 1.5-second intervals until communication between the tester and vehicle begins.
  3. Check that there are no electrical key transmitters in the vehicle.
  4. Before performing the inspection, check that DTC B1242 (wireless door lock control) is not output (Click here).
  5. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

1.CHECK POWER DOOR LOCK OPERATION

  1. When the door control switch on the master switch assembly is operated, check that the doors unlock and lock according to switch operation (Click here).

    OK:
    Door locks operate normally.



NG
GO TO POWER DOOR LOCK CONTROL SYSTEM (PROCEED TO PROBLEM SYMPTOMS TABLE) (Click here)
OK


2.CHECK ELECTRICAL KEY TRANSMITTER

  1. When another registered electrical key transmitter is used, check that the entry function operates normally (Click here).

    OK:
    Entry function operates normally.



NG
Go to step 5
OK


3.CHECK ELECTRICAL KEY TRANSMITTER (LED)

  1. Check that the transmitter LED illuminates each time when the switch is pressed 3 times.
    Result 
    Result
    		Proceed to
    Transmitter LED does not illuminate at all when switch is pressed 3 times
    		A
    Transmitter LED illuminates each time when switch is pressed 3 times
    		B
    Transmitter LED does not illuminate the second or third time
    		C

    HINT:
    If the transmitter LED does not illuminate the second or third time, the battery is depleted.



B
REPLACE ELECTRICAL KEY TRANSMITTER

C
REPLACE TRANSMITTER BATTERY (Click here)
A


4.INSPECT TRANSMITTER BATTERY (VOLTAGE)


    B178429

  1. Remove the battery from the electrical key transmitter 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 a lead wire around the terminal, wedge it between the terminals, or solder it. Terminal may be deformed or damaged, and the battery will not be able to be installed correctly.

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



    B182836E01

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

    HINT:
    When measuring the battery voltage, while operating the lock switch of a door outside handle assembly, bring the electrical key transmitter within the entry operating range to perform the measurement. For the entry operating range, refer to System Description (Click here).

    Standard Voltage:
    Item
    		Content
    Tester Connection
    		Battery positive (+) - Battery negative (-)
    Tool Setting
    		0.5 V/DIV., 100 ms/DIV.
    Condition
    		Engine switch off, all doors closed and lock switch pushed
    Specified Condition
    		2.2 to 3.2 V (Refer to the waveform)



NG
REPLACE TRANSMITTER BATTERY (Click here)
OK

REPLACE ELECTRICAL KEY TRANSMITTER 

5.CHECK WAVE ENVIRONMENT

  1. Bring the electrical key transmitter near the door control receiver, and check the wireless function.

    HINT:
    1. When the electrical key 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 indicates 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.

    OK:
    Wireless function operates normally.



NG
Go to step 6
OK

AFFECTED BY WAVE INTERFERENCE 

6.CHECK POWER SOURCE

  1. Check that the combination meter display turns off when the engine switch is turned off.

    OK:
    Combination meter turns off.

    HINT:
    This confirms that systems other than the entry and start system are correctly detecting the state of the power source.



NG
Go to step 7
OK

GO TO ENTRY AND START SYSTEM (FOR START FUNCTION) (Click here)  

7.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BATTERY AND BODY GROUND)


    B199585E03

  1. Disconnect the certification ECU connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    D34-17 (CUTB) - Body ground
    		Always
    		11 to 14 V
    D34-1 (+B) - Body ground
    		Always
    		11 to 14 V

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D34-15 (E) - Body ground
    		Always
    		Below 1 Ω

Text in Illustration 
*1
Front view of wire harness connector
(to Certification ECU)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


8.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - DOOR CONTROL RECEIVER)


    B216376E01

  1. Disconnect the door control receiver connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D35-5 (RCO) - G32-4 (+5)
    		Always
    		Below 1 Ω
    D35-15 (RDA) - G32-5 (DATA)
    		Always
    		Below 1 Ω
    D35-16 (RSSI) - G32-2 (RSSI)
    		Always
    		Below 1 Ω
    D35-5 (RCO) - Body ground
    		Always
    		10 kΩ or higher
    D35-15 (RDA) - Body ground
    		Always
    		10 kΩ or higher
    D35-16 (RSSI) - Body ground
    		Always
    		10 kΩ or higher
    G32-1 (GND) - Body ground
    		Always
    		Below 1 Ω

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Certification ECU)
    *2
    		Front view of wire harness connector
    (to Door Control Receiver ECU)



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


9.REPLACE DOOR CONTROL RECEIVER

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


NEXT


10.CHECK DOOR CONTROL RECEIVER (OPERATION)

  1. Check that the wireless function (Click here) and entry function (Click here) operate normally.

    OK:
    Wireless and entry functions operate normally.



NG
REPLACE CERTIFICATION ECU
OK

END (DOOR CONTROL RECEIVER IS DEFECTIVE)