DESCRIPTION
If communication between the remote start ECU and certification ECU (smart key ECU assembly) cannot be performed even if a remote start operation is performed to try changing the power source mode to on (IG) or start the hybrid control system, this DTC is stored.
When the remote start ECU does not respond to the certification ECU (smart key ECU assembly), this DTC is stored. When communication with the remote start ECU is established and a remote start operation is performed, this DTC is cleared.
| DTC Code | DTC Detection Condition | Trouble Area | DTC Output Confirmation Operation |
|---|---|---|---|
| B2779 | One of the following conditions is met (1 trip detection logic*): A remote start communication error occurs. Response is not possible. Registration has not been performed. | Remote start ECU Wire harness or connector Main body ECU (multiplex network body ECU) Certification ECU (smart key ECU assembly) | A remote start operation is performed. |
- *: Only output while a malfunction is present.
| Vehicle Condition when Malfunction Detected | Fail-safe Operation when Malfunction Detected |
|---|---|
| Hybrid control system does not start with remote start operation | Hybrid control system cannot be started by remote start operation only |
VEHICLE CONDITION AND FAIL-SAFE OPERATION WHEN MALFUNCTION DETECTED
| DTC Code | Data List and Active Test |
|---|---|
| B2779 | Wireless Starter Com ID Wireless C Code |
RELATED DATA LIST AND ACTIVE TEST
Scheme 246
When an open or short circuit is detected in the transponder key amplifier coil built into the power switch, the certification ECU (smart key ECU assembly) stores this DTC. This DTC is also stored as a past DTC.
| DTC Code | DTC Detection Condition | Trouble Area | DTC Output Confirmation Operation |
|---|---|---|---|
| B2784 | The transponder key amplifier coil built into the power switch is open (see below) or shorted (determined by communication with certification ECU (smart key ECU assembly)) (1 trip detection logic*). Terminal VC5, TXCT or CODE is open (includes disconnection of the power switch). The transponder key amplifier coil built into the power switch is open. | Power switch Wire harness or connector Certification ECU (smart key ECU assembly) | With park (P) selected, the key is held against the power switch and a hybrid control system start operation is performed by pressing and holding the power switch when the key battery is depleted. |
- *: Only output while a malfunction is present.
| Vehicle Condition when Malfunction Detected | Fail-safe Operation when Malfunction Detected |
|---|---|
| Hybrid control system cannot be started when key battery is depleted by holding key against power switch and pressing and holding power switch with park (P) selected |
VEHICLE CONDITION AND FAIL-SAFE OPERATION WHEN MALFUNCTION DETECTED
| DTC Code | Data List and Active Test |
|---|---|
| B2784 |
RELATED DATA LIST AND ACTIVE TEST
Scheme 247
When there is a short to GND in the power supply for the transponder key amplifier of the power switch, the certification ECU (smart key ECU assembly) stores this DTC.
| DTC Code | DTC Detection Condition | Trouble Area | DTC Output Confirmation Operation |
|---|---|---|---|
| B278A | A short to GND in the power supply of the transponder key amplifier of the power switch (VC5 - VC5) (1 trip detection logic*). | Wire harness or connector Power switch Certification ECU (smart key ECU assembly) | With park (P) selected, the key is held against the power switch and a hybrid control system start operation is performed by pressing and holding the power switch when the key battery is depleted. |
- *: Only output while a malfunction is present.
| Vehicle Condition when Malfunction Detected | Fail-safe Operation when Malfunction Detected |
|---|---|
| Hybrid control system cannot be started when key battery is depleted by holding key against power switch and pressing and holding power switch with park (P) selected |
VEHICLE CONDITION AND FAIL-SAFE OPERATION WHEN MALFUNCTION DETECTED
| DTC Code | Data List and Active Test |
|---|---|
| B278A |
RELATED DATA LIST AND ACTIVE TEST
Scheme 248
When an internal malfunction occurs in the ID code box (immobilizer code ECU), the certification ECU (smart key ECU assembly) stores this DTC.
| DTC Code | DTC Detection Condition | Trouble Area | DTC Output Confirmation Operation |
|---|---|---|---|
| B2790 | An internal malfunction occurs in the ID code box (immobilizer code ECU) (EEPROM access malfunction) (1 trip detection logic*). | ID code box (immobilizer code ECU) Certification ECU (smart key ECU assembly) | An immobilizer set/unset operation is performed (the power switch is turned off or on (IG) while carrying the key). |
- *: Only output while a malfunction is present.
| Vehicle Condition when Malfunction Detected | Fail-safe Operation when Malfunction Detected |
|---|---|
| Power switch on (READY): Hybrid control system cannot be started next time Hybrid control system stopped: Hybrid control system cannot be started |
VEHICLE CONDITION AND FAIL-SAFE OPERATION WHEN MALFUNCTION DETECTED
| DTC Code | Data List and Active Test |
|---|---|
| B2790 |
RELATED DATA LIST AND ACTIVE TEST
When there are communication malfunctions between the power management control ECU and ID code box (immobilizer code ECU), or when the communication ID codes do not match, the power management control ECU stores this DTC.
| DTC Code | DTC Detection Condition | Trouble Area | DTC Output Confirmation Operation |
|---|---|---|---|
| B2799 | Either condition is met (1 trip detection logic*): A malfunction in the communication or communication lines between the power management control ECU and ID code box (immobilizer code ECU). A matching communication code cannot be verified during communication between the power management control ECU and ID code box (immobilizer code ECU). | ID code box (immobilizer code ECU) Power management control ECU Wire harness or connector | Either condition is met: Within 10 seconds of a hybrid control system start operation being performed (with park (P) selected and the brake pedal depressed, press the power switch while carrying the key). If there is a malfunction, the hybrid control system stops (communication begins within 3 seconds of the hybrid control system start operation being performed, and DTCs are stored after 6 seconds). 10 seconds after the power switch is turned on (IG) after reconnecting the cable to the negative (-) terminal of the auxiliary battery (communication begins within 3 seconds of the power switch being turned on (IG), and DTCs are stored after 6 seconds). |
- *: Only output while a malfunction is present.
| Vehicle Condition when Malfunction Detected | Fail-safe Operation when Malfunction Detected |
|---|---|
| Hybrid control system cannot be started |
VEHICLE CONDITION AND FAIL-SAFE OPERATION WHEN MALFUNCTION DETECTED
| DTC Code | Data List and Active Test |
|---|---|
| B2799 |
RELATED DATA LIST AND ACTIVE TEST
Scheme 249
When the communication line (IMI - EFIO) between the power management control ECU and ID code box (immobilizer code ECU) is stuck high, the power management control ECU stores this DTC.
| DTC Code | DTC Detection Condition | Trouble Area | DTC Output Confirmation Operation |
|---|---|---|---|
| B279A | The communication line (IMI - EFIO) between the power management control ECU and ID code box (immobilizer code ECU) is stuck high (1 trip detection logic*). | Wire harness or connector (disconnection or break in wire harness is main cause) ID code box (immobilizer code ECU) Power management control ECU | Turn the power switch on (IG) and wait 6 seconds. |
- *: Only output while a malfunction is present.
| Vehicle Condition when Malfunction Detected | Fail-safe Operation when Malfunction Detected |
|---|---|
| Hybrid control system cannot be started | Hybrid control system cannot be started |
VEHICLE CONDITION AND FAIL-SAFE OPERATION WHEN MALFUNCTION DETECTED
| DTC Code | Data List and Active Test |
|---|---|
| B279A |
RELATED DATA LIST AND ACTIVE TEST
Scheme 250
This code is stored when a power management control ECU that is incompatible with the engine immobilizer system is installed to the vehicle.
| DTC Code | DTC Detection Condition | Trouble Area | DTC Output Confirmation Operation |
|---|---|---|---|
| B279C | A power management control ECU that is incompatible with the engine immobilizer system is installed (1 trip detection logic*). | Power management control ECU | Check for DTCs. |
- *: Only output while a malfunction is present.
| Vehicle Condition when Malfunction Detected | Fail-safe Operation when Malfunction Detected |
|---|---|
| Hybrid control system cannot be started |
VEHICLE CONDITION AND FAIL-SAFE OPERATION WHEN MALFUNCTION DETECTED
| DTC Code | Data List and Active Test |
|---|---|
| B279C |
RELATED DATA LIST AND ACTIVE TEST
- The certification ECU (smart key ECU assembly) blinks the security indicator light when the immobilizer is set (the power switch is off).
