WIRELESS DOOR LOCK CONTROL SYSTEM(w/o Entry and Start System), Diagnostic DTC:B1242

DTC Code DTC Name
B1242 Wireless Door Lock Tuner Circuit Malfunction

DESCRIPTION



DTC No. DTC Detection Condition Trouble Area
B1242 In diagnostic mode, applicable RDA signal cannot be received 3 times in succession after the PRG signal is output from the main body ECU (network gateway ECU).

  • Wire harness or connector

  • Door control receiver

  • Main body ECU (network gateway ECU)

  • Tire pressure warning ECU and receiver*

WIRING DIAGRAM

A004JKEE02
w/o Tire Pressure Warning System
*a from Battery
*b Main Body ECU (Network Gateway ECU)
*c Door Control Receiver
A004JNJE02

CAUTION / NOTICE / HINT

Note


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

  • When replacing or inspecting the door control receiver and wire harness, do not change the position or length of the wire harness. If the wire harness is too close to the door control receiver, wireless function performance may be affected.

  • * When replacing the tire pressure warning ECU and receiver, read the transmitter IDs stored in the old ECU using the GTS and write them down before removal.

  • * It is necessary to perform initialization after registration of the transmitter IDs into the tire pressure warning ECU and receiver if the tire pressure warning ECU and receiver has been replaced.



PROCEDURE


  1. CONFIRM VEHICLE SPECIFICATION


    1. Confirm the vehicle specification.

      Result
      Result Proceed to
      w/ Tire Pressure Warning System A
      w/o Tire Pressure Warning System B

    B

    CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (NETWORK GATEWAY ECU) - DOOR CONTROL RECEIVER) Click here

    A

  2. CHECK FOR DTC (TIRE PRESSURE WARNING SYSTEM)


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      OK
      DTCs are not output.
      Result
      Result Proceed to
      NG A
      OK B

    A

    GO TO TIRE PRESSURE WARNING SYSTEM Click here

    B

    CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (NETWORK GATEWAY ECU) - TIRE PRESSURE WARNING ECU AND RECEIVER) Click here

  3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (NETWORK GATEWAY ECU) - DOOR CONTROL RECEIVER)


    1. Disconnect the D6 main body ECU (network gateway ECU) connector.

    2. Disconnect the H27 door control receiver connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      D6-6 (PRG) - H27-3 (PRG) Always Below 1 Ω
      D6-7 (RDA) - H27-2 (RDA) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      D6-6 (PRG) or H27-3 (PRG) - Body ground Always 10 kΩ or higher
      D6-7 (RDA) or H27-2 (RDA) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT DOOR CONTROL RECEIVER (POWER SOURCE, GROUND)


    1. A004KFME01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Door Control Receiver)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H27-5 (+B) - Body ground Always 11 to 14 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      H27-1 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. REPLACE DOOR CONTROL RECEIVER


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


    NEXT

  6. REGISTER RECOGNITION CODE


    1. Perform the Registration procedures Click here.


    NEXT

  7. CHECK FOR DTC


    1. Clear the DTC Click here.

    2. Check for DTC Click here.

      OK
      DTC is not output.

    OK

    END (DOOR CONTROL RECEIVER IS DEFECTIVE)

    NG

    REPLACE MAIN BODY ECU (NETWORK GATEWAY ECU) Click here

  8. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (NETWORK GATEWAY ECU) - TIRE PRESSURE WARNING ECU AND RECEIVER)


    1. Disconnect the D6 main body ECU (network gateway ECU) connector.

    2. Disconnect the H28 tire pressure warning ECU and receiver connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      D6-7 (RDA) - H28-4 (BRDA) Always Below 1 Ω
      D6-6 (PRG) - H28-5 (BPRG) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      D6-7 (RDA) or H28-4 (BRDA) - Body ground Always 10 kΩ or higher
      D6-6 (PRG) or H28-5 (BPRG) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING ECU AND RECEIVER - DOOR CONTROL RECEIVER)


    1. Disconnect the H28 tire pressure warning ECU and receiver connector.

    2. Disconnect the H27 door control receiver connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      H28-10 (RRDA) - H27-2 (RDA) Always Below 1 Ω
      H28-9 (RPRG) - H27-3 (PRG) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      H28-10 (RRDA) or H27-2 (RDA) - Body ground Always 10 kΩ or higher
      H28-9 (RPRG) or H27-3 (PRG) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. INSPECT DOOR CONTROL RECEIVER (POWER SOURCE, GROUND)


    1. A004KFME01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Door Control Receiver)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H27-5 (+B) - Body ground Always 11 to 14 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      H27-1 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. INSPECT TIRE PRESSURE WARNING ECU AND RECEIVER (POWER SOURCE, GROUND)


    1. Disconnect the H28 tire pressure warning ECU and receiver connector.

    2. A004I00E02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Tire Pressure Warning ECU and Receiver)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H28-1 (IG) - Body ground Ignition switch ON 11 to 14 V
      H28-7 (+B) - Body ground Always 11 to 14 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      H28-12 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  12. REPLACE DOOR CONTROL RECEIVER


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


    NEXT

  13. REGISTER RECOGNITION CODE


    1. Perform the Registration procedures Click here.


    NEXT

  14. CHECK FOR DTC


    1. Clear the DTC Click here.

    2. Check for DTC Click here.

      OK
      DTC is not output.

    OK

    END (DOOR CONTROL RECEIVER IS DEFECTIVE)

    NG

  15. REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER


    1. Replace the tire pressure warning ECU and receiver with a new one Click here.


    NEXT

  16. CHECK FOR DTC


    1. Clear the DTC Click here.

    2. Check for DTC Click here.

      OK
      DTC is not output.

    OK

    END (TIRE PRESSURE WARNING ECU AND RECEIVER IS DEFECTIVE)

    NG

    REPLACE MAIN BODY ECU (NETWORK GATEWAY ECU) Click here