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

DTC Code DTC Name
All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate

DESCRIPTION

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

WIRING DIAGRAM

B211013E15

CAUTION / NOTICE / HINT

Note:

  • 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.

  • 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.

  • Check that there are no electrical key transmitters in the vehicle.

  • Before performing the inspection, check that DTC B1242 (wireless door lock control) is not output (Click here).

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

  • When checking the entry lock operation multiple times, the lock operation may be limited to 2 consecutive operations according to the settings. In order to perform the entry lock operation 3 or more times, an unlock operation must be performed once (any type of unlock operation is sufficient). However, only consecutive entry lock operations are limited. Using the wireless lock or other types of lock operations, it is possible to perform consecutive lock operations without this limitation.

PROCEDURE

  1. CHECK POWER DOOR LOCK CONTROL SYSTEM

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

      OK

      Door locks operate normally.

    GO TO POWER DOOR LOCK CONTROL SYSTEM

    (Click here)

  2. CHECK ELECTRICAL KEY TRANSMITTER

    1. When another registered electrical key transmitter is used, check that the wireless and entry functions operate normally (Click here).

      Table 1. Result

      Result

      Proceed to

      Entry function operates

      A

      Entry function does not operate

      B

    CHECK WAVE ENVIRONMENTClick here

  3. CHECK ELECTRICAL KEY TRANSMITTER (LED)

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

      Table 2. Result

      Result

      Proceed to

      Transmitter LED does not illuminate when switch is pressed 3 times

      A

      Transmitter LED illuminates 3 times when switch is pressed 3 times

      B

      Transmitter LED does not illuminate second or third time

      C
      Tip:

      If the transmitter LED does not illuminate the second or third time, replace the transmitter battery as it is depleted.

    REPLACE ELECTRICAL KEY TRANSMITTER

    REPLACE TRANSMITTER BATTERY

    (Click here)

  4. INSPECT TRANSMITTER BATTERY (VOLTAGE)

    1. B178429

      Remove the battery from the electrical key transmitter that does not operate (Click here).

    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 terminals, or solder it. A terminal may be deformed or damaged, and the battery will not be able to be installed correctly.

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

    4. B455160E01

      Using an oscilloscope, check the transmitter battery voltage waveform.

      Tip:

      When measuring the battery voltage, while operating the lock switch of a door handle, 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

      2.5 to 3.2 V (Refer to the waveform)

    REPLACE ELECTRICAL KEY TRANSMITTER

    REPLACE TRANSMITTER BATTERY

    (Click here)

  5. CHECK WAVE ENVIRONMENT

    1. Bring the electrical key transmitter near the door control receiver and perform a wireless and entry function operation check.

      Tip:

      • 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.

      • If the inspection result is that the problem only occurs in certain locations or at certain 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 and entry functions operate normally.

    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.

      Tip:

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

    GO TO ENTRY AND START SYSTEM (FOR START FUNCTION)

    (Click here)

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

    1. U122402E02

      Disconnect the H51 ECU connector.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      H51-17 (CUTB) - Body ground

      Always

      11 to 14 V

      H51-1 (+B) - Body ground

      Always

      11 to 14 V

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H51-15 (E) - Body ground

      Always

      Below 1 Ω
    Table 3. Text in Illustration

    *1

    Front view of wire harness connector

    (to Certification ECU)

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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

    1. U122426E02

      Disconnect the H55 ECU connector.

    2. Disconnect the O14 receiver connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H55-5 (RCO) - O14-4 (+5)

      Always

      Below 1 Ω

      H55-15 (RDA) - O14-5 (DATA)

      Always

      Below 1 Ω

      H55-16 (RSSI) - O14-2 (RSSI)

      Always

      Below 1 Ω

      H55-5 (RCO) - Body ground

      Always

      10 kΩ or higher

      H55-15 (RDA) - Body ground

      Always

      10 kΩ or higher

      H55-16 (RSSI) - Body ground

      Always

      10 kΩ or higher

      O14-1 (GND) - Body ground

      Always

      Below 1 Ω
      Table 4. Text in Illustration

      *1

      Front view of wire harness connector

      (to Certification ECU)

      *2

      Front view of wire harness connector

      (to Door Control Receiver)

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. CHECK DOOR CONTROL RECEIVER (OPERATION)

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

    2. Check that the wireless and entry functions operate normally.

      OK

      Wireless and entry functions operate normally.

    END (DOOR CONTROL RECEIVER IS DEFECTIVE)

    REPLACE CERTIFICATION ECU