Mitsubishi Lancer Evolution IV, Workshop Manual

Page: 367 / 391

CHASSIS ELECTRICAL –
Combination Meters
CHASSIS ELECTRICAL –
Combination Meters
54-27
ON-VEHICLE SERVICE
SPEEDOMETER CHECK
1. Adjust the pressure of the tyres to the specified level.
2. Set the vehicle onto a speedometer tester and use wheel
chocks to hold the rear wheels.
3. Pull the parking brake lever firmly.
4. To prevent the front wheel from moving from side to side,
attach tension bars to the tie-down hook, and secure
both ends to anchor plates.
5. To prevent the vehicles from starting, attach a chain or
wire to the rear towing hook, and secure the other end
of the chain or wire firmly to an unmovable body.
6. Check if the speedometer indication range is within the
standard values and if the pointer fluctuation is within
the limits.
Caution
Do not operate the clutch suddenly. Do not
increase/decrease speed rapidly while testing.
Standard values:
Vehicle speed km/h Speedometer indication
allowable errors km/h
40 37 – 45
80 75 – 88
120 113 – 132
160 150 – 176
Limit: Pointer fluctuation
(at vehicle speeds of higher than 35 km/h)
±
3 km/h
TACHOMETER CHECK
1. Insert a paper clip in the engine speed detection connector
from the harness side, and attach the engine
speedometer.
2. Compare the readings of the engine speedometer and
the tachometer at every engine speed, and check if the
variations are within the standard values.
Standard values:
700 r/min :
±
100 r/min
3,000
*1
r/min :
±
150 r/min
3,000
*2
r/min :
+
225 to –100 r/min
5,000
*1
r/min :
±
250 r/min
5,000
*2
r/min :
+
325 to –125 r/min
6,000
*1
r/min :
±
300 r/min
7,000
*2
r/min :
+
400 to –100 r/min
8,000
*3
r/min :
+
400 to 0 r/min
NOTE
*1: Tachometer measurable up to 8,000 r/min
*2: Tachometer measurable up to 9,000 r/min and one measurable up to 10,000 r/min
*3: Tachometer measureble up to 10,000 r/min
Wheel chocks
Tension bar
Tie-down hook
Front
Anchor plate
Engine speed detection
connector