Chery A21 2005 Service Manual page 276

A5 has two veh icle body compute r, one is front IS U
the other is rear ISU .
1．Front ISU
The parts that co ntrolled by the front ISU h ave the f ollowing functions:
（1）In ner lamp control an d steering lamp、he adlamp high/low beam;
（2）Central con trol lock f unction
（3）Button-typ e electric window o peration function
（4）In termission time con trol of window wip er
（5）Delay the cl ose time o f electric window when the ignition sw itch is of f
（6）Rear view mirror heating control fuction (the adju stment o f the moto r is
Con trolled by switch )
（7）Key not pull out warning
（8）Warning and anti-th eft
（9）CAN-BUS data trans fer(with i nstrument、engine、ABS computer)
C wire plug 20
A wire plug 32 B w ire plug 32
Figure14- 2 Front ISU
2．Vehicle inner illu mination lamp
The 30th power line sup ply power to the fro nt ISU via the fuse F B 29, and then via the fuse
F10 and output from the C14 pin of ISU to supply power to key hole ill umination lamp、glove box
lamp、ma ke up mir ror 、front roof lamp、rear roo f lamp.
The B14 of fro nt ISU is t he F/L contact switc h; the B30 of front ISU is the F /R contac t switch.
When the indoor illumination lamp switch is at the left side or right side (door control
position), the front I SU computer will control the i nner illum ination lamp (roof lamp work).
When the igni tion powe r is off, if o ne of the 4 doors is open, the inner illum ination lamp will
light on; while afte r 15 min, the inn er illumination lamp will be off automatically to save
2 8
shown as fig ure 14-2 ,
（
E power
D wire plug 12
F gr ound
electricity.
W hen the ignition p ower is of f, open one door, the inner il lumination lamp wi ll light on
until the door is c losed, and will cont inue to lig ht for 15s after the door closed.
W hen the i gnition po wer on, the inner ill umination lamp will light on only when t he door is
open, a nd be off w hen the door is clos ed.
T he A23 p in of front ISU is t he key hole
ignition power is off, the key illumination lamp will light on if open the drive r 's door. E ven if the
driver's door is closed, the lamp will continue to light on for 8s. Shown as figu re 14-3.
Keyhole Light Clove Box Switch
30
15
ACC1
ACC2
31
ILLUM
Instrument/FrontGround/A2
FB29
80A
ON O N
O FF O FF
Instrument/FrontGround/G
R R P/L
E C14 A23
C6
F1 0
7.5A Front ISU
F igure14- 3 Vehicle inner illumina tion lamp circuit
illumin ation lamp signal output pin, when the
Front Ceiling Light
10 9 9
Rear Windshield
Warmer Switch
Clove Box Switch
Front Ground/ Front Gr ound/
Left 2 /8 Front R ight /5
O W
B14 B30