Lighting For Instrument and Controls

YWLighting For Instruments And Controls:

WIRING DIAGRAM

Lighting For Instruments And Controls: Component Location:

COMPONENT LOCATION VIEW

Lighting For Instruments And Controls: Component ID:

COMPONENT ID
10 Lights switch on dashboard between steering wheel and driver's door.
16 Rheostat, lighting for controls, on dashboard between the steering wheel and driver's door.
18 Lighting, main instrument display panel on dashboard.
22A Fuse board behind the cover flap in the glove box.
25 Switch, hazard flashers, beside centre air vent in dashboard.
47 Main instrument display panel, dashboard.
48 Cigarette lighter on the centre console beside the ashtray.
49 Clock in the centre of the dashboard.
88 Switch, extra fog lights, on dashboard between the steering wheel and driver's door.
91 Lighting, selector lever indicator, beside the selector lever in the centre console.
116 Switch, electrically heated rear window, on control panel for heating and ventilation.
143 Switch, recirculation, on the dashboard between the centre console and steering wheel.
148 Ashtray lighting, cigarette lighter on centre console.
154 Lighting, control panel for heating and ventilation on centre console.
161 Switch, rear fog light, on dashboard between the steering wheel and driver's door.
169 A/C Switch, on the dashboard between the centre console and steering wheel.
174 Relay, daylight driving lights, in main fuse box behind the glove box.
210 EDU trip computer in the main instrument display panel.
216 ACC control module in the middle of the dashboard.
241 SCC trip computer in the centre of the dashboard.
252 Rheostat, driver's seat heating pad, on dashboard between the steering wheel and centre console.
253 Rheostat, passenger's seat heating pad, on dashboard between the steering wheel and centre console.
267 Radio connector (10-pin) on the centre console beside the place
(H10-3) reserved for the radio.
282 Switch, headlamp beam adjustment, on dashboard between the steering wheel and driver's door.
386 Switch, electric window lifts and electrically operated sunroof, on the centre console between the seats.
449 Switch, TCS ON/OFF, on the dashboard.

1-Pin Connector
H1-4 Under the centre console beside the selector lever.

2-Pin Connector
H2-17 Adjacent to the heater control panel.

Grounding Points
G2 Grounding point on the battery tray.
G6 Grounding point, negative distribution terminal, in main fuse box (22B) behind the glove box.
G8 Grounding point, dashboard, by the left-hand front loudspeaker socket.
G14 Grounding point, left-hand seat member, under the front left-hand seat.

DESCRIPTION OF OPERATION
Rheostat 16, lighting for controls, is equipped with an internal electronic unit.

The rheostat is supplied with current via fuse 29. It is used for steplessly adjusting the brightness of the lighting of connected components by means of a PWM signal.

The brightness of the lighting of the rheostat is also adjusted at the same time.

Current from pin 2 is supplied to the following components:
10 Lights switch
25 Hazard flashers switch
116 Electrically heated rear window switch
143 Switch, recirculation
148 Ashtray lighting, front
154 Lighting, heater controls
161 Rear fog light switch
169 Switch, A/C
216 Climate control unit
252 Rheostat, heating pad, driver's seat
253 Rheostat, heating pad, passenger's seat
267 Radio dial illumination

Current from pin 3 of the rheostat is supplied to the following components:
91 Selector lever indicator
386 Switches, electric window lifts, electrically operated sunroof

Current from pin 5 is supplied to the following components:
18 Lighting, main instrument display panel 47
49/241 Clock or SCC trip computer
210 EDU trip computer
267 Radio dial illumination
282 Headlamp beam adjustment switch

Current from pin 9 of the rheostat is supplied to the following components:
88 Extra fog lights switch
449 TCS ON/OFF switch

FAULT DIAGNOSIS HINTS
1. Check that fuse 29 is intact and supplied with current.
2. Check that current is supplied to pin 7 of the rheostat.
3. Check that pins 2, 3, 5 and 9 of the rheostat are live.
4. Check that pin 1 of the rheostat is connected to ground.
5. Check that the connections and grounding of each component are satisfactory.