Lighting For Instrument and Controls
�C/WLighting For Instruments And Controls:
WIRING DIAGRAM
Lighting For Instruments And Controls - Component Location:
COMPONENT LOCATION
10 Lights switch on dashboard between steering wheel and driver's door.
16 Instrument lighting rheostat on dashboard between steering wheel and driver's door.
22A Main fuse board in the dashboard.
25 Hazard flashers switch beside the SID unit.
88 Switch for extra fog lights in switch assembly between steering wheel and driver's door.
91 Selector lever lamp in the centre console adjacent to the selector lever.
148 Ashtray illumination, front
154 Lighting in the heating and ventilation control panel.
161 Rear fog light switch in switch assembly between steering wheel and driver's door.
216 ACC control module in centre of dashboard.
220 Fan control on side of evaporator.
252 Switch for electrically heated driver's seat, in switch assembly on centre console.
253 Switch for electrically heated passenger's seat, in switch assembly on centre console.
282 Switch, headlamp beam adjustment, on dashboard between the steering wheel and driver's door.
267 Radio and cassette player in the centre
353 console.
375 Mobile telephone connection.
386 Switches for electric window lifts/electric sunroof, on the
centre console between the front seats.
503 Switch for electrically heated rear seat at rear of centre console.
504 Control panel for heating and ventilation, on the centre console.
506 WINTER switch, beside gear selector lever.
518 TCS switch in switch assembly on centre console.
540 Main Instrument display panel on the dashboard.
541 SID unit on the dashboard.
33-pin connector
H33-3 Blue connector on the bracket below the left-hand A pillar.
Grounding Points
G4 Grounding point, centre console between the front seats.
G14 Grounding point, left-hand front seat member, under the seat.
G33P Grounding point, connector bracket (Power) below the left-hand A pillar.
G33S Grounding point, connector bracket (Signal) below the left-hand A pillar.
G34P Grounding point, control module bracket (Power) below the right-hand A pillar.
G34S Grounding point, control module bracket (Signal) below the right-hand A pillar.
DESCRIPTION OF OPERATION
Instrument lighting rheostat 16 is equipped with a built-in electronic unit.
The rheostat is supplied with current via fuse 29. Rheostat 16 is used to steplessly regulate the brightness of the lighting in connected components and its own lighting by means of a pulse width modulation signal.
Current From Pin 2 Is Supplied To The Following Components:
^ 540 Main instrument display panel
^ 541 SID unit
The SID unit uses the value to control instrument and display lighting in different systems.
Current From Pin 3 Of The Rheostat Is Supplied To The Following Components:
^ 18 Lighting for main instrument display panel
^ 25 Switch for hazard flashers
^ 91 Selector lever lamp
^ 148 Ashtray illumination
^ 216 Automatic climate control unit display lighting
^ 252 Switch for electrically heated driver's seat
^ 253 Switch for electrically heated passenger's seat
^ 353 Radio dial illumination
^ 375 Mobile telephone installation pre-wiring
^ 503 Switch for electrically heated rear seat
^ 506 WINTER switch (Transmission Control Module)
^ 518 Traction control system switch
Current From Pin 5 Is Supplied To The Following Components:
^ 10 Lights switch
^ 88 Switch for extra fog lights
^ 161 Switch for rear fog light
^ 282 Headlamp beam adjustment switch
^ 386 Switches, electric window lifts, electrically operated sunroof
Current from pin 9 is supplied to the following components:
^ 154 Lighting, heater controls
^ 216 Control module, Automatic Climate Control
FAULT DIAGNOSIS HINTS
1. Check that fuse 29 is intact and supplied with current.
2. Check that current is present on pin 7 of the rheostat.
3. Check that a pulse width modulation signal is present on pins 2, 3, 5 and 9 of the rheostat and that the electrical connections and grounding of every component are satisfactory.