Diagnostic Trouble Code Chart
HINT:
If a trouble code is output during the DTC check, inspect the trouble areas listed for that code. For details of the code, refer to the "See page" below.
Transponder Key ECU AssemblyDTC Code | Detection Item | Trouble Area | See page |
|---|---|---|---|
B2780 |
Push Switch / Key Unlock Warning Switch Malfunction |
- Transponder key ECU assembly - Unlock warning switch assembly - Harness or connector |
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B2784 |
Antenna Coil Open / Short |
Transponder key amplifier |
|
B2793 |
Transponder Chip Malfunction |
Key |
|
B2794 |
Unmatched Encryption Code |
Key |
|
B2795 |
Unmatched Key Code |
Key |
|
B2796 |
No Communication in Immobiliser System |
- Transponder key ECU assembly - Key - Harness or connector - Transponder key amplifier |
|
B2797 |
Communication Malfunction No. 1 |
- Transponder key ECU assembly - Key - Harness or connector - Transponder key amplifier |
|
B2798 |
Communication Malfunction No. 2 |
Key |
|
HINT:
The DTCs for the engine immobiliser system are specified above. If other codes are output, check the DTC chart for the SFI system.
ECMDTC Code | Detection Item | Trouble Area | See page |
|---|---|---|---|
B2799 |
Engine Immobiliser System Malfunction |
- Harness or connector - Transponder key ECU assembly - ECM |
|
B279A |
Theft Deterrent System Communication Line High Fixation |
- Harness or connector - Transponder key ECU assembly - ECM |
|
B279C |
Theft Deterrent System Presence Detection |
ECM |
|
Test yourself
A quick Toyota 4Runner quiz: every answer comes with an explanation and a link to the manual page.