DTC 6-4: Backup Battery Connection Error: Description
WARNING: This page is about a different car, the 2007 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.
After the ignition switch is turned ON and 10 seconds or more have passed, if the mayday ECU assembly does not recognize the mayday battery (backup battery), this DTC is output.
HINT:
This DTC is only a historic DTC.
DTC DETECTION CONDITION AND TROUBLE AREA
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 6-4 | Communication or communication line is abnormal between mayday ECU and mayday battery |
|