Dtc B1242 Wireless Door Lock Tuner Circuit Malfunction

Body Electrical. Camry. Acv40 Gsv40
Door Lock. Camry. Acv40 Gsv40

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - DOOR CONTROL RECEIVER)

CHECK HARNESS AND CONNECTOR (BATTERY, BODY GROUND)

REPLACE DOOR CONTROL RECEIVER

CONFIRM DTC

DTC B1242 Wireless Door Lock Tuner Circuit Malfunction


DESCRIPTION

The door control receiver receives signals from the transmitter and sends these signals to the main body ECU.

DTC No.
DTC Detection Condition
Trouble Area
B1242
In diagnostic mode, an applicable RDA signal cannot be received within 1 second after an PRG signal has been output from the main body ECU.
  1. Wire harness
  2. Door control receiver
  3. Main body ECU (Instrument panel J/B)

WIRING DIAGRAM


Camry. Acv40 Gsv40.Door Lock.Power Door Lock Control System. Dtc B1242 Wireless Door Lock Tuner Circuit Malfunction


INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - DOOR CONTROL RECEIVER)


    Camry. Acv40 Gsv40.Door Lock.Power Door Lock Control System. Dtc B1242 Wireless Door Lock Tuner Circuit Malfunction

  1. Disconnect the E6 main body ECU connector and the O17 door control receiver connector.

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

    Standard resistance:
    Symbol
    (Tester Connection)
    		Condition
    		Specified Condition
    RDA (E6-12) - RDA (O17-2)
    		Always
    		Below 1 Ω
    RDA (E6-12) - Body ground
    		Always
    		10 kΩ or higher
    PRG (E6-10) - PRG (O17-3)
    		Always
    		Below 1 Ω
    PRG (E6-10) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.CHECK HARNESS AND CONNECTOR (BATTERY, BODY GROUND)


    Camry. Acv40 Gsv40.Door Lock.Power Door Lock Control System. Dtc B1242 Wireless Door Lock Tuner Circuit Malfunction

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

    Standard:
    Symbol
    (Tester Connection)
    		Condition
    		Specified Condition
    GND (O17-1) - Body ground
    		Always
    		Below 1 Ω
    +B (O17-5) - Body ground
    		Always
    		10 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.REPLACE DOOR CONTROL RECEIVER

  1. Reconnect the E6 main body ECU connector.

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

  1. Perform the registration procedures (CAMRY_ACV40 RM000001NN1002X.html).

    HINT:
    If a normally functioning door control receiver is available, connect it and check if the wireless door lock function is normal or DTCs are output. If the alternative receiver functions normally, replace the original door control receiver.

NEXT


4.CONFIRM DTC

  1. Clear the DTCs (CAMRY_ACV40 RM000001NN6002X.html).

  1. Check if the same DTC is detected.

    HINT:
    Reinstall the sensors, connectors, etc. and restore the previous vehicle conditions before rechecking for DTCs.

    Result:

    Result
    		Proceed To
    DTC is output
    		A
    DTC is not output
    		B


B
END
A

REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)