Ford Corsar Repair Manual page 192

KEY POINTS
WHAT
.....
Vehicle & engine model
WHEN
.....
Date, Frequencies
WHERE
.....
Road conditions
HOW
.....
Operating conditions,
Weather conditions,
Symptoms
TROUBLE DIAGNOSES
I
CA2OE
I
How to Perform Trouble Diagnoses for Quick
and Accurate Repair (Cont'd)
DIAGNOSTIC WORKSHEET
There are many kinds of operating conditions that lead to mal-
functions on engine components.
A
good grasp of such conditions can make trouble-shooting faster
and more accurate.
In general, feelings for a problem depend on each customer. It is
important to fully understand the symptoms or under what con-
ditions a customer complains..
Make good use of
a
diagnostic worksheet such
as the
one shown
below in order to utilize all the complaints for trouble-shooting.
Worksheet sample
VIN
Mileage
In Service Date
Customer name M RIMS
Engine
#
Model
&
Year
Trans.
Incident Date
Impossible to start C1 No combustion U Partial combustion
C1 Partial combustion affected by throttle position
Partial combustion NOT affected by throttle position
C1 Possible but hard to start
U
Others [
1
No fast idle
U
Unstable High idle
U
Low idle
U
Others [
1
Stumble U Surge U Detonation U Lack of power
U
Intake backfire U Exhaust backfire
U Others [
1
-
U
At the time of start While idling
C1 While accelerating
While decelerating
Just after stopping
U While loading
Just after delivery Recently
U
In the morning
U
At night In the daytime
U
All the time
U
Under certain conditions
U Sometimes
U
Not effected
Fine U Raining
U
Snowing U Others [
1
U
Hot
C1 Warm C1 Cool U
Cold
U
Humid " F
U
Cold During warm-up U After warm-up
Engine speed
I
1
1
I
1
1
1
1
2,000 4,000 6,000 8,000
rpm
C1 In town In suburbs
U
Highway U Off road (upldown)
Not affected
U At starting While idling At racing
While accelerating
U
While cruising
While decelerating While turning (RHILH)
Vehiclespeed
'
' ' ' ' ' '
0
2 0 40 6 0 8 0 100 120KPH
Turned on Not turned on
Symptoms
Manuf. Date
U
Startability
U
Idling
.
U
Driveability
Engine s t a l l
lncident occurrence
Frequency
Weather conditions
Weather
Temperature
Engine conditions
Road conditions
Driving conditions
P
ECM light
4