DTC B2241: Driver Memory 2 Select Switch Circuit Low: Description

Memory 2 set switch is wired to driver's power window switch. Driver's power window switch contains a microprocessor which takes the signal from memory function switch and assigns a digital message to switch signal. Driver's power window switch sends this message over a Simple Bus Interface (SBI) link to the Driver Door Module (DDM). DDM checks SBI for a switch input to determine the need for a change in driver's seat position, climate control, radio settings and mirror position.

When DDM receives a valid memory switch input, it sends a SBI message to right door module to position mirror. DDM also sends a class 2 message to Memory Seat Module (MSM) to position driver's seat, instrument panel module to adjust climate control settings and to integrated radio control to adjust radio settings. DDM makes necessary adjustment to left outside mirror.

DTC B2241 will set if DDM is powered and DTCs B1982 DEVICE POWER CIRCUIT LOW or B1983 DEVICE POWER CIRCUIT HIGH are not current and DDM receives a message that a memory switch is closed for more than 30 continuous seconds. When DTC B2241 sets, DDM rules the continuous signal from driver's power window switch from memory function switch as invalid and will not respond to it. DTC B2241 will clear if either switch signal is not received during one check of SBI or if power to DDM changes from OFF to ON.