DESCRIPTION
This DTC is stored when a communication error occurs between the transponder key amplifier and transponder key ECU assembly. Some possible reasons for the communication error are: 1) 2 or more ignition keys are positioned too close together, or 2) noise is occurring in the communication line.
DTC Code |
DTC Detection Condition |
Trouble Area |
---|---|---|
B2797 |
2 or more ignition keys are positioned too close to each other or noise occurs in the communication line. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
When the transponder key ECU assembly is replaced, refer to Registration (See
page ).
PROCEDURE
1. |
CHECK KEY |
(a) Check whether the ignition key being used is near other ignition keys, as shown in the illustration. Also, check whether a key ring is in contact with the key grip. Result
|
|
B | ![]() |
GO TO STEP 3 |
|
2. |
CHECK FOR DTC |
(a) Separate the keys from each other or remove the key ring.
(b) Clear the DTCs (See page ).
(c) Insert a key into the ignition key cylinder, and then remove it. Repeat this for all the other keys.
(d) Check that no DTC is output (See page ).
OK:
DTC B2797 is not output.
OK | ![]() |
END |
|
3. |
CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - TRANSPONDER KEY AMPLIFIER) |
(a) Disconnect the F34 ECU connector.
(b) Disconnect the F17 amplifier connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F34-15 (CODE) - F17-4 (CODE) |
Always |
Below 1 Ω |
F34-15 (CODE) or F17-4 (CODE) - Body ground |
Always |
10 kΩ or higher |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
4. |
CHECK TRANSPONDER KEY ECU ASSEMBLY (NOISE) |
(a) Using an oscilloscope, check for noise in the waveform between the terminals of the F17 amplifier connector and F34 ECU connector.
Item |
Content |
---|---|
Tester Connection |
F17-4 (CODE) - F34-15 (CODE) |
Tool Setting |
5 V/DIV., 20 ms./DIV. |
Condition |
Key inserted in ignition key cylinder |
OK:
No noise is present.
Text in Illustration
*a |
Component with harness connected (Transponder Key Amplifier) |
*b |
Component with harness connected (Transponder Key ECU Assembly) |
*c |
Noise should not appear |
NG | ![]() |
FIND CAUSE OF NOISE AND REMOVE IT |
|
5. |
REPLACE TRANSPONDER KEY AMPLIFIER |
(a) Temporarily replace the transponder key amplifier with a new or normally
functioning one (See page ).
|
6. |
CHECK WHETHER ENGINE STARTS |
(a) Check that the engine starts normally.
OK:
Engine starts.
OK | ![]() |
END (TRANSPONDER KEY AMPLIFIER IS DEFECTIVE) |
NG | ![]() |
REPLACE TRANSPONDER KEY ECU ASSEMBLY |
Screen Flicker or Color Distortion
PROCEDURE
1.
CHECK DISPLAY SETTING
(a) Reset display settings (contrast, brightness) and check that the screen appears
normal.
OK:
The display returns to normal.
OK
END
NG
...
Removal
REMOVAL
PROCEDURE
1. REMOVE UPPER RADIATOR SUPPORT SEAL
2. REMOVE FRONT BUMPER COVER
(a) Put protective tape around the front bumper cover.
(b) Remove the 3 bolts, 10 screws and 6 clips.
(c) Detach the 14 claws to remove the front bumper cover with ra ...