DTC B2302: Communication Error from Sub Battery Module to Backup Relay [12/2017 - 10/2023]: Description
Backup relay malfunctions cannot be detected on the sub-battery module assembly side. Therefore, information about a backup relay input malfunction that is detected on the backup relay ECU side is sent to the sub-battery module assembly, which outputs this DTC.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Memory |
|---|---|---|---|---|---|
| B2302 | Communication Error from Sub Battery Module to Backup Relay | This DTC is stored when a malfunction is detected in communication from the sub-battery module assembly to the backup relay. (3 trip detection logic) |
|
Comes on | DTC stored |
HINT:
The details of a DTC can be checked by using the DTC Sub Code of the freeze frame data that was recorded when the DTC was output.
| DTC Sub Code | Detail |
|---|---|
| "38" | Waveform malfunction in sub-battery module assembly signal line (BUR) continuously occurs for 15 seconds |
| "39" | Short to ground in sub-battery module assembly signal line (BUR) continuously occurs for 10 seconds |