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, then it is output to the transponder key ECU assembly.
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
B2784 |
Antenna coil is open/shorted. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
If the transponder key ECU assembly is replaced, register the key and ECU communication ID (See page ).
PROCEDURE
1. |
READ VALUE USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Immobiliser / Data List.
(e) Read the Data List according to the display on the Techstream.
Immobiliser (Transponder Key ECU Assembly)
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Antenna Coil Status |
Transponder key amplifier coil condition/Normal or Fail |
Normal: Antenna coil normal Fail: Antenna coil malfunctioning |
- |
OK:
On the Techstream screen, the item displays Normal according to the chart above.
OK |
REPLACE TRANSPONDER KEY ECU ASSEMBLY |
|
2. |
CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - TRANSPONDER KEY AMPLIFIER) |
(a) Disconnect the transponder key ECU assembly connector.
(b) Disconnect the transponder key amplifier connector. |
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D22-4 (TXCT) - D21-5 (TXCT) |
Always |
Below 1 Ω |
D22-5 (AGND) - D21-7 (AGND) |
Always |
Below 1 Ω |
D22-14 (VC5) - D21-1 (VC5) |
Always |
Below 1 Ω |
D22-15 (CODE) - D21-4 (CODE) |
Always |
Below 1 Ω |
D22-4 (TXCT) - Body ground |
Always |
10 kΩ or higher |
D22-5 (AGND) - Body ground |
Always |
10 kΩ or higher |
D22-14 (VC5) - Body ground |
Always |
10 kΩ or higher |
D22-15 (CODE) - Body ground |
Always |
10 kΩ or higher |
D21-5 (TXCT) - Body ground |
Always |
10 kΩ or higher |
D21-7 (AGND) - Body ground |
Always |
10 kΩ or higher |
D21-1 (VC5) - Body ground |
Always |
10 kΩ or higher |
D21-4 (CODE) - Body ground |
Always |
10 kΩ or higher |
*1 |
Front view of wire harness connector (to Transponder Key ECU Assembly) |
*2 |
Front view of wire harness connector (to Transponder Key Amplifier) |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. |
INSPECT TRANSPONDER KEY AMPLIFIER (POWER SOURCE AND GROUND) |
(a) Reconnect the transponder key ECU assembly connector.
(b) Reconnect the transponder key amplifier connector. |
|
(c) Measure the voltage and resistance according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D22-14 (VC5) - Body ground |
No key is in ignition key cylinder |
Below 1 V |
D22-14 (VC5) - Body ground |
Key is in ignition key cylinder |
4.6 to 5.4 V |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D22-5 (AGND) - Body ground |
Always |
Below 1 Ω |
*1 |
Component with harness connected (Transponder Key ECU Assembly) |
OK |
REPLACE TRANSPONDER KEY AMPLIFIER |
NG |
REPLACE TRANSPONDER KEY ECU ASSEMBLY |
Diagnosis System
DIAGNOSIS SYSTEM
1. DESCRIPTION
When troubleshooting a vehicle with a diagnosis system, the only difference from
the usual troubleshooting procedure is connecting the Techstream to the vehicle
and reading various data output from the vehicle's skid c ...
Back Camera Disconnected (C1622)
DESCRIPTION
This DTC is stored if the navigation receiver assembly*1 or radio and display
receiver assembly*2 judges that the signals or signal lines between the navigation
receiver assembly*1 or radio and display receiver assembly*2, and the rear televis ...
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
HINT:
If a trouble code is displayed during the DTC check, inspect the trouble areas
listed for that code. For details of the code, refer to the "See page" below.
Power Steering System
DTC Code
...