Toyota Sienna Service Manual: 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 signal is amplified by the amplifier, and output to the transponder key ECU.
|
DTC No. |
DTC Detection Condition |
Trouble Area |
|
B2784 |
Antenna coil open/short |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
1 READ VALUE OF INTELLIGENT TESTER
- Connect the intelligent tester (with CAN VIM) to the DLC3.
- Turn the ignition switch on and turn the intelligent tester main switch on.
- Select ANTENNA COIL in the DATA LIST and read the value displayed on the intelligent tester.
Transponder key ECU:
OK: NORMAL (Antenna coil is normal) appears on the screen.
2 CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY -TRANSPONDER KEY AMPLIFIER)
- Disconnect the T6 ECU and I14 switch connectors.
- Measure the resistance according to the value(s) in the table below.
Resistance
3 INSPECT TRANSPONDER KEY ECU ASSEMBLY
- Reconnect the T6 ECU and I14 amplifier connectors.
- Measure the voltage according to the value(s) in the table below.
Voltage
- Measure the resistance according to the value(s) in the table below.
Resistance
REPLACE TRANSPONDER KEY AMPLIFIER
Push Switch / Key Unlock Warning Switch Malfunction
DTC B2780 Push Switch / Key Unlock Warning Switch Malfunction
DESCRIPTION
This DTC will be output if the transponder key ECU does not detect that the
unlock warning switch is on
even when the ign ...
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 t ...
Other materials:
Eject Error/ Elevator Error/ Clamp Error/ Eject Error/ Elevator Error/ Clamp
Error
DTC 62-45 Eject Error
DTC 62-51 Elevator Error
DTC 62-52 Clamp Error
DTC 63-45 Eject Error
DTC 63-51 Elevator Error
DTC 63-52 Clamp Error
DESCRIPTION
DTC No.
DTC Detecting Condition
Trouble Area
62-45
Disc cannot be ejected.
Radio receiver
62-5 ...
Master cylinder pressure sensor check (when using sst check wire)
(a) Leave the vehicle in a stationary condition and
release the brake pedal for 1 second or more, and
quickly depress the brake pedal with a force of 98 N
(10 kgf, 22 lbf) or more for 1 second or more.
(b) Check the ABS warning light stays on for 3
seconds.
HINT:
At this time, the ABS wa ...
Meter Illumination does not Dim at Night
DESCRIPTION
Confirm that the vehicle is equipped with the optitron meter, then
check this circuit.
The combination meter assembly receives a auto dimmer signal from
the body ECU by the multiplex
communication line.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK MULTIP ...
