Toyota Sienna Service Manual: Transponder Chip Malfunction
DTC B2793 Transponder Chip Malfunction
DESCRIPTION
This DTC is output when a malfunction is found in the key during the key code registration or the key code is not registered normally. Replace the key when the key code registration is not performed normally and this DTC is detected.
INSPECTION PROCEDURE
1 CHECK DTC OUTPUT
- Delete the DTC.
- Insert the key into the ignition key cylinder.
- Check that no code is output.
OK: No DTC is output.
2 RE-REGISTER KEY
- Delete the DTC.
- Re-register the key and insert this key into the ignition key cylinder.
Check that the engine starts with the key.
OK: The engine starts
REPLACE KEY
Antenna Coil Open / Short
DTC B2784 Antenna Coil Open / Short
DESCRIPTION
The transponder key coil is built into the transponder key amplifier and
receives a key code signal from
the transponder chip in the key. This sign ...
Unmatched Encryption Code
DTC B2794 Unmatched Encryption Code
DESCRIPTION
This DTC is output when a key with an incomplete key code is inserted into
the ignition key cylinder.
DTC No.
DTC Detection Condi ...
Other materials:
Registration
NOTICE:
The Vehicle Identification Number (VIN) must be input
into the replacement ECM.
HINT:
The VIN is a 17-digit alphanumeric vehicle identification
number. The intelligent tester is required to register the VIN.
1. INPUT INSTRUCTIONS
The general VIN input instructions using the
...
Cruise Main Indicator Light Circuit
DESCRIPTION
When the cruise control main switch is on, the CRUISE main indicator light
and READY indicator light
come on. This indicates the control condition (presence or absence of a vehicle
in front, vehicle-to-vehicle
distance, and set vehicle speed) and fail-safe state through the multip ...
Rear Occupant Classification Sensor LH Collision
Detection
DTC B1787 Rear Occupant Classification Sensor LH Collision
Detection
DESCRIPTION
DTC B1787 is output when the occupant classification ECU receives a collision
detection signal sent by
the rear occupant classification sensor LH if an accident occurs.
DTC B1787 is also output when the front s ...