Self-Diagnostic Mode 2
- To enter self-diagnostic mode 2, vehicle should be in self-diagnostic mode one. See step 1
and 2
in RETRIEVING DIAGNOSTIC TROUBLE CODES under SELF-DIAGNOSTIC SYSTEM. To switch from mode one to mode 2, disconnect SCS Service Connector Tool (07WAZ-0010100) for 10 seconds, then reconnect SCS service connector tool. Self-diagnostic mode 2 is accessed when ignition lock light illuminates and buzzer sounds for 2 seconds, then blinks and sounds 2 more times. To cancel mode 2, remove SCS service connector tool for 10 seconds or longer or turn ignition off.
- After self-diagnostic mode 2 is entered, test each suspect circuit between suspect switch and its related multiplex control unit by operating each suspect switch, individually. See steps 4
- 6
. If suspect switch circuit is okay, ignition lock light will flash once and buzzer will sound once. If ignition lock light will not flash and buzzer will not sound, Go to next step.
- Check 2-3 other circuits controlled by suspect switch circuit of related multiplex control unit. If other circuits are okay, repair damaged circuit and retest system operation. If other circuits are not okay, test more circuits controlled by same multiplex control unit. If these circuits are not okay, substitute a known-good multiplex control unit and recheck system operation. If system is okay, replace original multiplex control unit. If system is still malfunctioning, substitute next most likely faulty multiplex control unit with a known-good multiplex control unit and recheck system operation. If system is okay, replace original multiplex control unit.
- Door multiplex control unit switches include:
- Driver's door key cylinder switch (LOCK/UNLOCK)
- Driver's door lock switch
- Driver's door lock knob switch (LOCK/UNLOCK)
- Power window master switch
- Driver's multiplex control unit switches include:
- A/T gear position switch (PARK)
- Brake switch
- Dash light brightness controller
- Driver's door switch
- Driver's seat belt switch
- Engine oil pressure switch
- Generator "L" terminal
- Headlight/combination switch
- Hood switch
- Ignition key switch
- Instrument cluster lights brightness control
- Left rear door switch
- Left rear door lock knob switch (UNLOCK)
- Parking brake switch
- Tunk key cylinder switch
- Trunk latch switch and windshield wiper/washer switch, except MIST switch
- Passenger's multiplex control unit switches include:
- Front passenger's door switch
- Front passenger's key cylinder switch (LOCK/UNLOCK)
- Front passenger's door lock switch (LOCK/UNLOCK)
- Front passenger's door lock knob switch (UNLOCK)
- Keyless entry transmitter (LOCK, UNLOCK & TRUNK buttons)
- Radio switch (Radio switch is grounded through radio connector. Test switch by disconnecting connector from radio.)
- Right rear door switch and right rear door lock knob switch (UNLOCK)