DTC B2791: Key Unlock Warning Switch Off Malfunction
WARNING: This page is about a different car, the 2000 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.
- Check key unlock warning switch. See KEY UNLOCK WARNING SWITCH under COMPONENT TESTS. Replace key unlock warning switch as necessary, and retest system operation. If key unlock warning switch is okay, go to next step.
- Check circuits and connectors for faults between key unlock warning switch and ECM. See WIRING DIAGRAMS . Repair or replace wiring as necessary, and retest system operation. If circuits and connectors are okay, check ECM. See ECM PIN VOLTAGE TESTS under COMPONENT TESTS. If ECM is defective, replace ECM and retest system operation.