DTC B1221 Power Window Switch Circuit on Driver Door: Description
This DTC notifies how the switch works as follows:
If the DTC is not output when operating the switch, this means there is a failure of the switch contact. If the DTC is output when not operating the switch, this means the switch is stuck. When a malfunction is found using this diagnosis, inspect each switch. Then, replace the switch if there is a problem, or check the wire harness if there is no problem.
DTC DETECTION CONDITION
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B1221 | Sticking of either of the power window master switches (except window lock switch) |
|
HINT:
Refer to switch inspection (see TERMINALS OF ECU ).