Dongfeng DFA1063DJ10 (14)-301/303. Instruction - page 34

Electric System

EL-17

Instrument Panel

Technical parameter and function

Technical parameter

Constitution and function

The instrument panel assembly is consisted by speedometer, tachometer, water temperature meter, fuel

meter, warning system (14 warning indicator), and matched with the sensor and warner.

Disassembly

Speedometer (km/h)

0~140

Tachometer (r/min)

0~5000

Fuel meter

0-1/2-1

Water temperature meter ( ℃ )

40-80-100-120

Nominal voltage (V)

24

1.Panel assembly
2.Speedometer
3.Washer
4.Self-tapping screw
5.Warning lamp pattern piece
6.Big case
7.Soft printed circuit board
8.Nylon rivet

9.Speedometer lighting bulb holder
10.Small warning signal lamp bulb
holder assembly
11.Big warning signal lamp holder
12.Oil pressure gauge assembly
13.Fuel level gauge
14.Water temperature gauge
15.Small gauge transition
connector

16.Electronic tachometer
17.Washer
18.Self-tapping screw
19.Spring washer
20.Screw
21.Spring washer
22.Screw
23.Small gauge voltage drop
resistor

Electric System

EL-18

Disassembly

Pull out connectors and the flexible shaft, and then detach wires connected with the electronic tachometer before
removing the instrument panel assembly.

1.Remove the speedometer after detaching 3 tapping screw.

2.Pull out bulb when turning the bulb holder counter clockwise to make it aligned with the notch.

3.The voltage drop resistors of small meters are also tightened by tapping screws so that they can be removed.

4.The wire connectors of the speedometer are connected to the big case by the tapping screws and they can be

pulled out after removing the bulb holder and loosening screws. When assembling, fit lamps by passing
through the circuit board or by removing all the warning lamps first, connect wires and fit the lamps.

5.The circuit board is riveted to the case, so pull it out by force when detaching.

6.After removing the big case, the pattern pieces can be removed because they are stuck with glue which will not

dry. But they should be put in appropriate positions when assembling.

7.Remove meters after loosening screws at the back of the big case. Fit it carefully when assembling to avoid the

bad fit between transition connecting parts and the big case.

8.Take out the circuit board only after all the bulbs and screws are removed.

Instruments replacing

The speedometer and tachometer can be replaced directly after disassembling according to the above

method. The three small meters can be replaced after the transition connecting parts have been removed which
should be fit and tightened after the meters are replaced.

Reassembly and check

Reassemble the removed parts in the reverse order of removal and tighten screws when reassembling. Check

if there is any part assembled wrongly or any scratches, damages and so on. Then attach the connectors, the
tachometer wires and the flexible shaft of the speedometer. Assemble the instrument panel assembly and operate
it for a while to see if the meters work normally.

Notice
Attach connectors A and B appropriately and note if the voltage of the electric system is connected.
Stop the vehicle to check immediately if the warning indicator illuminated and something troubled

happened.

The light spring washer and washer of the small meters should be copper plated or galvanized.
Meters on the instrument panel should be matched with appropriately specified sensors.
The speedometer assembly and the big case are connected with panel by tapping screws, so please be careful

when assembling and disassembling in order to avoid damages of the tapping thread and result in loose
connecting.

Trouble analysis

Trouble

Cause

Method

Warning lamps
does not go on

Bulb holder slackened

Tighten the holder

Bulb damaged

Replace bulb

Wire slackened

Connect wire or tighten

Warning sensor damaged

Replace

Illuminator
does not go on
or in bad condi-
tion

Power of the bulb is over sufficient, insufficient or the bulb is aging. Replace

Holder is not tightened or bulb is damaged.

Tighten or replace

Wire slackened or broken

Tighten, connect

Electric System

EL-19

Speedometer

Dial description

The speedometer needle indicates the vehicle speed in kilometers per hour. The odometer indicates the accu-

mulated driving distance in kilometers.

The trip odometer indicates the distance driven per day or driving distance between specified regions. Firmly

press the reset knob to reset the meter indicator to zero and then release it before using this speedometer. The red
figure at the far right with the white background indicates readings in units of 0.1km.

Note:
Do not press the reset button during the driving period.
Do not pull or turn the reset button when press it.

Technical parameter

Type

Magnetic inductive

Speed indicator range (km/h)

0~140

Mileage counting figures (km))

Total

99999

Sum

999.9

Speed ratio

1:625

Connector thread

M18 × 1.5

The inner square hole of drive (mm)

2.6C × 2.6C

+0.12

11 +0.06

+0.12

11 +0.06

Electric System

EL-20

Structure

The speedometer is used to indicate the vehicle driving speed and

the accumulated driving distance. It comprises a speed and a mileage
unit which records vehicle driving mileage. These two units are inte-
grated into one body and driven by the flexible shaft which is connected
with transmission output shaft.

The mileage unit records the driven mileage of the vehicle in order

to do necessary maintenance on mileage. The counter is divided into an
accumulated counter and a day counter. The speed unit indicates the
transient speed of the vehicle. It is convenient to control the vehicle
speed so as to obtain safety, economy and high efficiency.

1.Flexible shaft 2.Drive shaft 3.Worm and lateral shaft

4.Worm and vertical shaft 5.Worm wheel 6.Digital wheel

7.Magnetic ring 8.Temperature compensated ring

9.Inductive aluminum cover 10.Needle shaft

11.Hairspring 12.Needle

Working principle

Drive of speedometer

The flexible shaft (driven by transmission main

shaft) mounted on the back of the transmission is driven
by pulling the square connector into the square hole at
the outside of the speedometer turning shaft which drives
the digital wheel through three sets of worm wheel and
worm.

Indication of odometer

When the flexible shaft drives the speedometer turn-

ing shaft to rotate, the magnetic steel on the drive shaft
rotates simultaneously, causing the eddy current within
the inductive cover, which also produce magnetic field.
Both fields interact on each other to produce deflecting
torque. The higher the vehicle speed is, the larger the
deflecting torque is, which can be indicated by the needle
deflection. When the needle deflecting torque of the hair-
spring, the needle will stay at the appropriate speed
value. The needle deflecting angle is proportional to the
speed of the speedometer turning shaft, that is, the vehi-
cle speed, causing the needle to indicate various speed.

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