DTC B2788: IG2 Signal Malfunction [08/2013 - ]: Description
WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
This DTC is stored when the steering lock ECU detects an IG2 power supply malfunction.
HINT:
The steering lock ECU is not connected to the CAN communication system. However, the steering lock ECU is connected to the certification ECU (smart key ECU assembly) via LIN communication and communicates with other components via CAN communication through the certification ECU (smart key ECU assembly).
| DTC No. | Detection Condition | Trouble Area | DTC Output Confirmation Operation |
|---|---|---|---|
| B2788 | Mismatch between the steering lock ECU IG2 input from the LIN communication system and from the direct line (1-trip detection logic*). |
|
No confirmation operation is necessary (monitoring is continuous). |
- *: Only output while a malfunction is present and the power switch is on (IG).
VEHICLE CONDITION AND FAIL-SAFE FUNCTION WHEN MALFUNCTION DETECTED
| Vehicle Condition when Malfunction Detected | Fail-safe Function when Malfunction Detected |
|---|---|
| The steering cannot be locked or unlocked. For this reason, the hybrid control system cannot be started. | - |
RELATED DATA LIST AND ACTIVE TEST ITEMS
| DTC No. | Data List Item | Active Test Item |
|---|---|---|
| B2788 | - | - |