Toyota Sienna Service Manual: Wireless Door Lock Tuner Circuit Malfunction

Toyota Sienna Service Manual / Door lock / Wireless door lock control system / Diagnostic trouble code chart / 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)

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

Standard resistance

Standard resistance

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

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:

Initialization
1. RESET When the control motor and clutch is replaced: The power slide door ECU cannot receive a switch signal from the control motor and clutch. This may cause the power slide door system to enter fail-safe mode and DTC (B2224 (LH) or B2223 (RH)) to set, and also make the syste ...

Installation
1. INSTALL FRONT SEAT ASSEMBLY LH Place the seat assembly in the cabin. NOTICE: Be careful not to damage the body. Connect the connectors under the seat assembly. Tighten the 2 bolts on the front side of the seat assembly. Torque: 37 N*m (375 kgf*cm, 27 ft.*lb ...

List of storage features
Auxiliary boxes Cup holders Door pockets Bottle holders Glove boxes Console box (if equipped) WARNING Do not leave glasses, lighters or spray cans in the storage spaces, as this may cause the following when cabin temperature becomes high: Glas ...