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 |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
1 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
- Check the voltage and resistance between the D4 receiver connector or B9 ECU connector and the body ground.
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:
Using the rear view monitor system
Screen description
The rear view monitor system screen will be displayed if the shift
lever is shifted to R while the engine switch is in the “ON” position
(vehicles without a smart key system) or IGNITION ON mode (vehicles
with a smart key system).
Vehicle width guide line
The lin ...
Diagnosis system
1. DESCRIPTION
Front power seat control system data can be read
through the Data Link Connector 3 (DLC3) of the
vehicle. When the system seems to be
malfunctioning, use the intelligent tester to check for
malfunctions and perform repairs.
2. CHECK DLC3
The vehicle us ...
Removal
NOTICE:
Before removing the tire pressure warning ECU, read the
registered transmitter IDs of all wheels and write them
down to use for re-registration of transmitter IDs (See
page TW-20).
1. DISCONNECT CABLE FROM NEGATIVE BATTERY
TERMINAL
CAUTION:
Wait at least 90 seconds after dis ...
