DESCRIPTION
When an open or short circuit is detected in the antenna coil built into the transponder key coil, the transponder key ECU assembly stores this DTC.
DTC No. |
DTC Detection Condition |
Trouble Area |
DTC Output Confirmation Operation |
---|---|---|---|
B2784 |
The antenna coil in the transponder key coil is open/shorted. |
|
Insert the door control transmitter assembly into the ignition key cylinder, turn the ignition switch from off to ON and wait at least 20 seconds. |
Vehicle Condition when Malfunction Detected |
Fail-safe Operation when Malfunction Detected |
---|---|
Engine cannot be started |
- |
DTC No. |
Data List and Active Test |
---|---|
B2784 |
Antenna Coil Status |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. |
CLEAR DTC |
(a) Clear the DTCs (See page ).
|
2. |
CHECK FOR DTC |
(a) Perform "DTC Output Confirmation Operation" procedure.
(b) Check for DTCs (See page ).
OK:
DTC B2784 is not output.
Result
Result |
Proceed to |
---|---|
DTC B2784 is output |
A |
DTC B2784 is not output |
B |
B | ![]() |
USE SIMULATION METHOD TO CHECK |
|
3. |
CHECK CONNECTION OF CONNECTOR |
(a) Check that the connector is properly connected to the transponder key coil.
|
4. |
CLEAR DTC |
(a) Clear the DTCs (See page ).
|
5. |
CHECK FOR DTC |
(a) Perform "DTC Output Confirmation Operation" procedure.
(b) Check for DTCs. (See page ).
OK:
DTC B2784 is not output.
Result
Result |
Proceed to |
---|---|
DTC B2784 is not output |
A |
DTC B2784 is output |
B |
A | ![]() |
END (CONNECTOR WAS NOT CONNECTED PROPERLY) |
|
6. |
CHECK TRANSPONDER KEY COIL (OUTPUT) |
(a) Using an oscilloscope, check the waveform.
*a |
Component with harness connected (Transponder Key Coil) |
*b |
Waveform 1 |
*c |
Waveform 2 |
- |
- |
Measurement Condition:
Tester Connection |
Condition |
Tool Setting |
Specified Condition |
---|---|---|---|
T9-1 (ANT1) - Body ground |
Within 3 seconds of inserting door control transmitter assembly into ignition key cylinder |
2 V/DIV., 500 ms./DIV. |
Pulse generation (See waveform 1) |
T9-5 (ANT2) - Body ground |
Within 3 seconds of inserting door control transmitter assembly into ignition key cylinder |
2 V/DIV., 500 ms./DIV. |
Pulse generation (See waveform 2) |
OK:
Waveform is similar to that shown in the illustration.
Result
Result |
Proceed to |
---|---|
NG |
A |
OK |
B |
B | ![]() |
REPLACE TRANSPONDER KEY COIL |
|
7. |
CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - TRANSPONDER KEY COIL) |
(a) Disconnect the T10 transponder key ECU assembly connector.
(b) Disconnect the T9 transponder key coil connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
T10-4 (ANT1) - T9-1 (ANT1) |
Always |
Below 1 Ω |
T10-15 (ANT2) - T9-5 (ANT2) |
Always |
Below 1 Ω |
T10-4 (ANT1) or T9-1 (ANT1) - Body ground |
Always |
10 kΩ or higher |
T10-15 (ANT2) or T9-5 (ANT2) - Body ground |
Always |
10 kΩ or higher |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
8. |
REPLACE TRANSPONDER KEY ECU ASSEMBLY |
(a) Replace the transponder key ECU assembly with a new one (See page
).
NOTICE:
Key ID code registration is necessary when replacing the transponder key ECU
assembly, refer to Registration (See page ).
|
9. |
CLEAR DTC |
(a) Clear the DTCs (See page ).
|
10. |
CHECK FOR DTC |
(a) Perform "DTC Output Confirmation Operation" procedure.
(b) Check for DTCs (See page ).
OK:
DTC B2784 is not output.
Result
Result |
Proceed to |
---|---|
DTC B2784 is not output |
A |
DTC B2784 is output |
B |
A | ![]() |
END (TRANSPONDER KEY ECU ASSEMBLY WAS DEFECTIVE) |
B | ![]() |
REPLACE TRANSPONDER KEY COIL |
Acceleration Sensor Stuck Malfunction (C1232,C1243,C1245,C1279)
DESCRIPTION
The skid control ECU (master cylinder solenoid) receives signals from the yaw
rate and acceleration (airbag sensor assembly) via the CAN communication system.
The airbag sensor assembly has a built-in yaw rate and acceleration sensor and
detects the vehicle's condition using 2 ...
Removal
REMOVAL
PROCEDURE
1. REMOVE MANUAL TRANSMISSION ASSEMBLY
(See page )
2. REMOVE CLUTCH RELEASE FORK SUB-ASSEMBLY
(a) Remove the clutch release fork sub-assembly with the clutch release
bearing assembly from the manual transmission assembly.
...
Front Radar Sensor Incorrect Axial Gap (C1A11,C1A14)
DESCRIPTION
When the system determines that the vehicle is driving straight ahead based on
signals from the yaw rate and acceleration sensor (airbag sensor assembly), etc.,
the millimeter wave radar sensor assembly performs self-diagnosis to check if the
sensor beam axis is misaligned.
C1A11 ...