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Illumination System:

WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
DTC DETECTION ITEM

System Refer to system See Section
Buckle illumination
  1. Driver side J/B control system (Driver belt)
  2. Passenger side J/B control system (Passenger belt)
  3. Luggage room J/B control system (Rear belt)
  1. DRIVER SIDE JUNCTION BLOCK (BODY NO. 2) CONTROL SYSTEM - DIAGNOSIS
  2. PASSENGER SIDE JUNCTION BLOCK (BODY NO. 3 ) CONTROL SYSTEM - DIAGNOSIS
  3. LUGGAGE ROOM JUNCTION BLOCK (BODY NO. 4) CONTROL SYSTEM - DIAGNOSIS
 
Door courtesy light
  1. Passenger door control system
  2. (Driver door control system)
  3. (Rear left door control system)
  4. (Rear right door control system)
  1. PASSENGER DOOR CONTROL SYSTEM - DIAGNOSIS
  2. -
  3. -
  4. -
Illumination system
(Switch illuminations, combination meter illumination)		 Driver side J/B control system DRIVER SIDE JUNCTION BLOCK (BODY NO. 2) CONTROL SYSTEM - DIAGNOSIS
-
Illuminated entry system (Illumination is normal)
  1. Driver side J/B control system
  2. Passenger side J/B control system
  3. (Driver door control system)
  4. (Passenger door control system)
  5. (Rear left door control system)
  6. (Rear right door control system)
  1. DRIVER SIDE JUNCTION BLOCK (BODY NO. 2) CONTROL SYSTEM - DIAGNOSIS
  2. PASSENGER SIDE JUNCTION BLOCK (BODY NO. 3 ) CONTROL SYSTEM - DIAGNOSIS
  3. -
  4. -
  5. -
  6. -
Illumination and interior light system (Vanity light, interior light, front personal light, step light, ignition key illumination) Passenger side J/B control system PASSENGER SIDE JUNCTION BLOCK (BODY NO. 3 ) CONTROL SYSTEM - DIAGNOSIS
Outer step light does not light up (in outer mirror)
  1. Passenger side J/B ECU
  2. (Driver door control system)
  3. (Passenger door control system)
  1. PASSENGER SIDE JUNCTION BLOCK (BODY NO. 3 ) CONTROL SYSTEM - DIAGNOSIS
  2. -
  3. -
Luggage compartment light Luggage room J/B control system LUGGAGE ROOM JUNCTION BLOCK (BODY NO. 4) CONTROL SYSTEM - DIAGNOSIS
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