Toyota RAV4 manuals

Toyota Sienna Service Manual: Wireless Door Lock Tuner Circuit Malfunction

DTC B1242 Wireless Door Lock Tuner Circuit Malfunction

DESCRIPTION

When a RDA signal is not input to the door control receiver within 1 second after the multiplex network body ECU outputs a PRG signal, this DTC is set.

DTC No.

DTC Detection Condition

Suspected Area

B1242

Within 1 second after PRG signal is output from multiplex network body ECU during self-diagnostic mode, corresponding RDA signal is not input
  • Wire harness
  • Door control receiver
  • Multiplex network body ECU

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

1 CHECK HARNESS AND CONNECTOR (DOOR CONTROL RECEIVER - MULTIPLEX NETWORK BODY ECU)

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

  1. Disconnect the D4 receiver connector.
  2.  Disconnect the B9 ECU connector.
  3.  Check the resistance between the wire harness side connectors.

Standard resistance

Standard resistance

  1. Check the voltage and resistance between the D4 receiver connector or B9 ECU connector and the body ground.

Standard

Standard

2 CHECK DOOR CONTROL RECEIVER

  1. Check that the DTC is not output.

REPLACE MULTIPLEX NETWORK BODY ECU

Diagnostic trouble code chart
HINT:  If a trouble code is displayed during the DTC check, inspect the circuit listed for that code. For details of the code, refer to the "See page" in the DTC chart.   ...

No Answer-Back (Hazard Warning Light and Wireless Door Lock Buzzer)
DESCRIPTION If there is no answer-back of the hazard light signal and the wireless door lock buzzer although the wireless control function is operating normally, there might be a malfunction in ...

Other materials:

Disassembly
1. REMOVE OCCUPANT CLASSIFICATION ECU 2. REMOVE FRONT SEAT CUSHION SHIELD INNER RH  Remove the screw.  Using a screwdriver, disengage the claws and remove the cushion shield inner. HINT: Tape the screwdriver tip before use. 3. REMOVE FRONT SEAT INNER BELT ASSEMBLY RH &nbs ...

Power Slide Door does not Fully Open
DESCRIPTION  When the LH / RH rear window is open 105 mm (5.91 in.) or more, the slide door half-open stopper is activated to force the slide door to stop at approximately 105 mm (5.91 in.) from the fully open position. This is caused by the jam protection function between the sli ...

Precaution
1. INSPECTION PROCEDURE FOR VEHICLE INVOLVED IN ACCIDENT  Perform the zero point calibration and sensitivity check if any of the following conditions occur.  The occupant classification ECU is replaced.  Accessories (seatback tray and seat cover, etc.) are installed. ...

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