All Doors Do Not Unlock Using Driver's Door Key Cylinder Switch

NOTE: If system is operating normally, all doors will unlock when door key cylinder switch is kept in unlock position for one second or more.

Check driver's door key cylinder switch. See DOOR KEY CYLINDER SWITCH under COMPONENT TESTS. Check driver's door lock knob switch. See DOOR LATCH ASSEMBLY under COMPONENT TESTS. Check for poor contact at ground connectors (G401, G402 or G251). See WIRING DIAGRAMS . Also check for open in circuits between driver's door key cylinder switch and multiplex control unit.