B1221

DTC B1221 Power window switch circuit on driver door

CIRCUIT DESCRIPTION

DTC Detecting Condition:

These DTC notifies how switch works as follows:

If DTC is not output when operating switch, this means failure of switch contact. If DTC is output when not operating switch, this means stick of switch. When a malfunction is found by this diagnosis, inspect each switch. Then, replace the switch if there is a problem, or check the wire harness if there is no problem.

HINT: Please refer to Windows and Glass/Windows/Power Window Switch for switch inspection.