DTC B1241/41: Body Ecu Switch Circuit Diagnosis

WARNING: This page is about a different car, the 2003 Lexus RX 300 and 2002 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.

These DTCs notify how the switch works as follows:

If the DTC is not output when operating switch, it means failure of switch contact.
If DTC is output when not operating the switch, it means the switch is stuck.

When something wrong is found by this diagnosis, inspect each switch. Then, replace the switch if there is a problem, or check the wiring harness if there is no problem.

Detecting Condition - Stuck switch.

Trouble Area

Driver Side Buckle Switch.
Stop Light Switch.
Light Control Switch.
Wiring Harness.

For switch inspection, see POWER DOOR LOCKS & LIFTGATE article under DOOR LOCKS & ANTI-THEFT SYSTEMS in ACCESSORIES & EQUIPMENT.