DESCRIPTION
This DTC is stored when the ID for the remote engine starter is not registered or the certification ECU (smart key ECU assembly) does not respond, even though the remote engine starter system (Toyota supplied part) has been operated to start the engine
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2779 | Remote engine starter communication error, response not possible or ID not registered. | Wire harness or connector Remote engine starter wire harness Remote engine starter ECU assembly Main body ECU (Multiplex network body ECU) Certification ECU (smart key ECU assembly) |
Scheme 211
This DTC is stored when the ID for the remote engine starter is not registered or the certification ECU (smart key ECU assembly) does not respond, even though the remote engine starter system (Toyota supplied part) has been operated to start the engine
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2779 | Remote engine starter communication error, response not possible or ID not registered. | Wire harness or connector Remote engine starter wire harness Remote engine starter ECU assembly Main body ECU (Multiplex network body ECU) Certification ECU (smart key ECU assembly) |
This DTC is stored when there is an open or short in the transponder key coil (built into the engine switch).
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2784 | Transponder key coil is open or shorted. | Wire harness or connector Engine switch Certification ECU (Smart key ECU assembly) |
Scheme 212
This DTC is stored when there is an open or short in the transponder key coil (built into the engine switch).
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2784 | Transponder key coil is open or shorted. | Wire harness or connector Engine switch Certification ECU (Smart key ECU assembly) |
This DTC is stored when the engine switch power source supply line is open or shorted.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B278A | Engine switch power source supply line is open or shorted. | Wire harness or connector Engine switch Certification ECU (Smart key ECU assembly) |
Scheme 213
This DTC is stored when the engine switch power source supply line is open or shorted.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B278A | Engine switch power source supply line is open or shorted. | Wire harness or connector Engine switch Certification ECU (Smart key ECU assembly) |
This DTC is output when the ID code box (immobiliser code ECU) detects an internal malfunction.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2790 | ID code box (Immobiliser code ECU) detects internal malfunction | ID code box (Immobiliser code ECU) Certification ECU (Smart key ECU assembly) |
This DTC is stored when one of the following occurs: 1) the ECM detects an error in its own communication with the ID code box (immobiliser code ECU); 2) the ECM detects an error in the communication lines; or 3) the ECU communication ID between the ID code box (immobiliser code ECU) and ECM is different and an engine start is attempted.
HINT
Before troubleshooting this DTC, make sure that no certification ECU (smart key ECU assembly) DTCs are present. If present, troubleshoot the certification ECU (smart key ECU assembly) DTCs first.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2799 | One of the following conditions is met: Error in communication between ECM and ID code box (immobiliser code ECU) Error in communication lines Communication ID is different between ID code box (immobiliser code ECU) and ECM during communication | Wire harness or connector ECM ID code box (immobiliser code ECU) |
Scheme 214
This DTC is stored when one of the following occurs: 1) the ECM detects an error in its own communication with the ID code box (immobiliser code ECU); 2) the ECM detects an error in the communication lines; or 3) the ECU communication ID between the ID code box (immobiliser code ECU) and ECM is different and an engine start is attempted.
HINT
Before troubleshooting this DTC, make sure that no certification ECU (smart key ECU assembly) DTCs are present. If present, troubleshoot the certification ECU (smart key ECU assembly) DTCs first.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2799 | One of the following conditions is met: Error in communication between ECM and ID code box (immobiliser code ECU) Error in communication lines Communication ID is different between ID code box (immobiliser code ECU) and ECM during communication | Wire harness or connector ECM ID code box (immobiliser code ECU) |
If the communication line (EFIO - IMI) to the ID code box (immobiliser code ECU) is stuck high output (e. g. shorted to +B), the ECM stores this DTC.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B279A | When the communication line (EFIO - IMI) between ECM and ID code box (immobiliser code ECU) is stuck high output. | Wire harness or connector ID code box (immobiliser code ECU) ECM |
Scheme 215
If an ECM that is incompatible with the engine immobiliser system is installed, the ECM stores this DTC.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B279C | When an ECM that is incompatible with engine immobiliser system is installed. | ECM |
If an ECM that is incompatible with the engine immobiliser system is installed, the ECM stores this DTC.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B279C | When an ECM that is incompatible with engine immobiliser system is installed. | ECM |
The security indicator light blinks continuously due to a continuous signal received from the certification ECU (smart key ECU assembly) while the engine immobiliser is set.
