Last Modified: 04-05-2023 |
6.11:8.1.0 |
Doc ID: RM100000000VJL3 |
Model Year Start: 2016 |
Model: Sienna |
Prod Date Range: [12/2015 -
] |
Title: THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/o Smart Key System): B2784; Antenna Coil Open / Short; 2016 - 2020 MY Sienna [12/2015 - ] |
DTC
|
B2784
|
Antenna Coil Open / Short
|
DESCRIPTION
When an open or short circuit is detected in the transponder key coil, the transponder key ECU assembly stores this DTC.
DTC Code
|
DTC Detection Condition
|
Trouble Area
|
B2784
|
The transponder key coil is open or shorted.
|
-
Wire harness or connector
-
Transponder key coil
-
Transponder key ECU assembly
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
If the transponder key ECU assembly is replaced, refer to Registration (See page
).
-
After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.
PROCEDURE
(a) Clear the DTCs (See page
).
NEXT
|
|
|
(a) Check for DTCs (See page
).
HINT:
Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.
OK:
DTC B2784 is not output.
NG
|
|
|
3.
|
CHECK CONNECTION OF CONNECTOR
|
(a) Check that the connectors are properly connected to the transponder key coil.
NEXT
|
|
|
(a) Clear the DTCs (See page
).
NEXT
|
|
|
(a) Check for DTCs (See page
).
HINT:
Before checking for DTCs, perform "DTC Output Confirmation Operation" procedure.
OK:
DTC B2784 is not output.
Result
Result
|
Proceed to
|
B2784 is not output
|
A
|
B2784 is output
|
B
|
A |
|
END (CONNECTOR WAS NOT CONNECTED PROPERLY)
|
B
|
|
|
6.
|
CHECK TRANSPONDER KEY COIL (OUTPUT)
|
(a) Using an oscilloscope, check the waveform.
Text in Illustration
*a
|
Component with harness connected
(Transponder Key Coil)
|
*b
|
Waveform 1
|
*c
|
Waveform 2
|
-
|
-
|
Waveform 1
Item
|
Content
|
Tester Connection
|
D148-1 (ANT1) - Body ground
|
Tool Setting
|
20 V/DIV., 2 s./DIV.
|
Condition
|
Within 3 seconds of inserting key into ignition key cylinder
|
Waveform 2
Item
|
Content
|
Tester Connection
|
F148-5 (ANT2) - Body ground
|
Tool Setting
|
20 V/DIV., 2 s./DIV.
|
Condition
|
Within 3 seconds of inserting key into ignition key cylinder
|
OK:
Waveform is similar to that shown in the illustration
NG
|
|
|
7.
|
CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - TRANSPONDER KEY COIL AND BODY GROUND)
|
(a) Disconnect the D151 transponder key ECU assembly connector.
(b) Disconnect the D148 transponder key coil connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
D151-4 (ANT1) - D148-1 (ANT1)
|
Always
|
Below 1 Ω
|
D151-15 (ANT2) - D148-5 (ANT2)
|
Always
|
Below 1 Ω
|
D151-4 (ANT1) or D148-1 (ANT1) - Body ground
|
Always
|
10 kΩ or higher
|
D151-15 (ANT2) or D148-5 (ANT2) - Body ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
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
).
NEXT
|
|
|
(a) Clear the DTCs (See page
).
NEXT
|
|
|
(a) Check for DTCs (See page
).
HINT:
Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.
OK:
DTC B2784 is not output.
Result
Result
|
Proceed to
|
B2784 is not output
|
A
|
B2784 is output
|
B
|
A |
|
END (TRANSPONDER KEY ECU ASSEMBLY WAS DEFECTIVE)
|
|