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

DESCRIPTION

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

WIRING DIAGRAM

A001DUWE02
*a from Battery
*b DATA
*c Certification ECU
*d Door Control Receiver

PROCEDURE


  1. CHECK POWER DOOR LOCK SYSTEM


    1. When the master switch assembly's door control switch is operated, check that the locked doors unlock.

      Result
      Result Proceed to
      Door locks operate normally OK
      Door locks do not operate normally NG

    NG

    GO TO POWER DOOR LOCK CONTROL SYSTEM Click here

    OK

  2. CHECK ELECTRICAL KEY TRANSMITTER


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

      Result
      Result Proceed to
      Entry function operates normally A
      Entry function does not operate normally B

    B

    CHECK WAVE ENVIRONMENT Click here

    A

  3. INSPECT TRANSMITTER BATTERY (VOLTAGE)


    1. Remove the battery (lithium battery) from the transmitter Click here.

    2. Inspect the battery capacity Click here.


    OK

    REPLACE ELECTRICAL KEY TRANSMITTER

    NG

    REPLACE TRANSMITTER BATTERY Click here

  4. CHECK WAVE ENVIRONMENT


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

      Tech Tips

      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.

      Result
      Result Proceed to
      Operation check fails A
      Operation check is normal B

      Tech Tips

      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.


    B

    AFFECTED BY WAVE INTERFERENCE

    A

  5. INSPECT FUSE (P MPX-B)


    1. Remove the P MPX-B fuse from the passenger side junction block.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      P MPX-B fuse Always Below 1 Ω

    NG

    REPLACE FUSE

    OK

  6. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BATTERY)

    A001FROE02
    *1 Front view of wire harness connector: (to Certification ECU)

    1. Disconnect the L15 ECU connector.

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

      Standard voltage
      Tester Connection Condition Specified Condition
      L15-20 (CUTB) - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    A001BF1E02
    *a Front view of wire harness connector: (to Certification ECU)
    *b Front view of wire harness connector: (to Door Control Receiver)
    *c DATA

    1. Disconnect the R37 receiver connector.

    2. Disconnect the L15 ECU connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      R37-2 (+5) - L15-29 (RCO) Always Below 1 Ω
      R37-3 (DATA) - L15-38 (RDA) Always Below 1 Ω
      R37-4 (ASEL) - L15-37 (ASEL) Always Below 1 Ω
      R37-5 (RSSI) - L15-39 (RSSI) Always Below 1 Ω
      R37-6 (GND) - Body ground Always Below 1 Ω
      R37-2 (+5) - Body ground Always 10 kΩ or higher
      R37-3 (DATA) - Body ground Always 10 kΩ or higher
      R37-4 (ASEL) - Body ground Always 10 kΩ or higher
      R37-5 (RSSI) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK DOOR CONTROL RECEIVER (OPERATION)


    1. Replace the door control receiver with a normal one Click here.

    2. Check that it operates normally.

      OK
      Operates normally

    OK

    END (DOOR CONTROL RECEIVER IS DEFECTIVE)

    NG

    REPLACE CERTIFICATION ECU