Chery A21 2005, Service Manual, Page: 284 / 475

Instrument System
The A5 automobile c ombination instrum ent contains serie s of instruments
and meters that show the vehicle status 、 all k inds of warning lamp that supervise
the vehi cle to pre vent abno rmal performance and inform the driv er and indicator
lamps th at show the driver how each part works and also illume the instruments
and met ers. The c ircuit is shown as figure 16-1.
Th e Voltage of the battery supply to the 11th pin of combin ation instrument
via fuse FB22. The voltage of the 15 th wire which has gone thro ugh the ignition
switch supply to the 13th p in of com bination instrument via fuse FB3, it is for the
fuel warning lamp
、 door open warn ing lamp 、 engine oil warni ng lamp 、 brake
system warning lamp 、 ABS warning lamp 、 ai r bag warning lamp and so on . Once
the othe r end of these indica tors gain electricity, they'll work.
The 29th 、 30th pin of the combination instrument are connectted to CA N wire,
instruments are c onnectted to engin e EMS 、 ABS 、 fro nt ISU co mputer by CAN
wire, they share data information. The instrument system ca n read D TC by
apparatus, the 15th pin of the combination instrument is diagnose wire.
10 6 10 3
30
15
ACC1
ACC2
ILLUM
31
FB22
7.5A
FB3
7.5A
ECU/A2/ 6
11 13 12 17 16 27 18 7 32
3 5 30 29 9 2 26
24
15
To Combination Instrument
Instrument/Front
Ground/13
To Brake Shoe
Thickness Sensor
To
ECU 59#
To
Handbrake
Instrument/Air
Conditioner/1
To Air Conditioner
Control
Panel Module 10#
Instrument/
FrontGround/2
Front
Ground/Roof/4
To
Sunroof
Module 3#
To
Dynamo
To Air Bag
Module
10#
Fuse Box L
Plug-In Unit 10# Fuse Box G
Plug-In Unit 4#
Fuse Box G
Plug-In Unit 7#
Instrument/Front
Ground/B5
Instrument/Front
Ground/B4
To Front I SU
Plug-In Unit
11#
To Combination
Switch2#
Instrum ent/Air
Bag/D# ECU/A2/16
Brake
Shoe
Alarm
Vehicle
Speed
Signal
Output
Handbrake
Indicator
Light
Vehicle
Speed
Signal
Input
Charge
Indicator
Light
Air Bag
Alarm Backl ight
Power
Supply
Ignition
Switch
Power
Supply
Normal
Live
Wire
Engine Oil
Pressure
Alarm
Brake Fluid
Level Alarm
Side Air Bag
Warning Lamp
Diagnosis
Line
To
Diagnosis
Port 7#
Instrument/
AirBag/B#
TO
Bag Module
47#
Brake Fluid
Level
Sensor
Engine Oil
Pressure
Switch
Figure16-1 Ci rcuit Diagram Instrument System
Instrument/Front
Ground/1
ECU/A2/11 ECU/A1/ 15
Position of combination Ins trument
8
21
Oil Level
Signal Input
Fuel
Level Sensor
Instrument/Front
Ground/12
Front Ground/Rear
Ground B/D#
31
CAN Line
Wake Input
To
Front ISU PEI
Plug-In Unit 2#
Engine Oil Pressure Switch
30
15
ACC1
ACC2
ILLUM
31
Circuit Analysis ：
Fuel Leve l Sensor Brake Fluid Level Sensor
36
Ground
CAN-H
CAN-L