Toyota Sienna Quiz
Door lock

Wireless Door Lock Tuner Circuit Malfunction

In this manual: Door lock
Introduction — 55Service specifications — 7Maintenance — 7Engine — 264U151e automatic transaxle — 108Transfer — 19Propeller shaft — 8Drive shaft — 14Differential — 16Axle — 18Suspension — 37Tire and wheel — 54Brake control — 141Parking brake — 16Steering Column — 11Power steering — 18Air conditioning — 106Supplemental restraint system — 146Seat belt — 22Theft deterrent — 14Engine immobiliser — 17Cruise control — 65Lighting — 61Wiper and washer — 13Door lock — 42Meter — 28Audio / visual — 94Navigation — 108Park assist / monitoring — 33Horn — 5Garage door opener — 42GR-FE Engine control system — 126Supplemental restraint system — 147Other system — 14Windshield / windowglass — 43Mirror — 23Instrument panel — 6Seat belt — 22Seat — 92Engine hood / door — 104Exterior — 39Interior — 5Sliding roof — 9Multiplex communication — 18Can communication — 23
3steps
~18min
2/5difficulty
Done 0 of 3

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

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