Toyota 4Runner: Diagnostic Trouble Code Chart
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 Assembly|
DTC 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 |
|
|
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 |
|
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HINT:
The DTCs for the engine immobiliser system are specified above. If other codes are output, check the DTC chart for the SFI system.
ECM|
DTC 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 |
|
Data List / Active Test
DATA LIST / ACTIVE TEST
1. READ DATA LIST
HINT:
Using the Techstream to read the Data List allows the values or states of switches,
sensors, actuators and other items to be read without removing ...
Antenna Coil Open / Short (B2784)
DESCRIPTION
The antenna coil receives key code signals from the transponder chip in the key
grip. The coil is built into the transponder key amplifier, which amplifies the
key code signals and ou ...
Other materials about Toyota 4Runner:
Front Passenger Side Door Entry Unlock Function does not Operate
DESCRIPTION
If the front passenger side door entry unlock function does not operate but the
entry lock function operates, the communication line between the vehicle and electrical
key transmitter is normal. The part at fault may be an unlock sensor circui ...
If your vehicle has to be stopped in an emergency
Only in an emergency, such as if it becomes impossible to stop the vehicle
in the normal way, stop the vehicle using the following procedure:
Steadily step on the brake pedal
with both feet and firmly depress it.
Do not pump the brake pedal repeatedly a ...
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