Mitsubishi 1992 3000GT, Service Manual

Page: 615 / 1308

AUTOMATIC TRANSAXLE
Troubleshootina
INSPECTION OF CONTROL SYSTEM
Check the control system by using the scan tool and following the procedure given below.
CONTROL SYSTEM INSPECTION TABLE
Check Item
Throttle position
sensor
l
Data list
l
Item No. 11
Oil temperature
sensor
l Data list
l Item No. 15
servo
switch
l
Data list
l
Item No. 21
Ignition signal
line
Data list
Item No. 23
Accelerator pedal
switch
model only>
Data list
Item No. 24
Closed throttle
position switch
Data list
Item No. 25
Air conditioning
compressor clutch
relay signal
Data list
Item No. 26
Transaxle gear
position
Data list
Item No. 27
,
I
I
I
I
I
Condition
Accelerator pedal fully
released
Accelerator pedal slowly
depressed
Accelerator pedal fully
depressed
Cold engine (before start)
Engine warming up
Criteria Possible Cause of Trouble (or Remedy)
v
l
TPS is improperly adjusted if voltage
is high when accelerator pedal is fully
Varies with throttle
l
depressed or released.
TPS or circuit harness is defective
opening degree
if there is no change.
v
l
TPS or accelerator pedal cable is
defective if change is not smooth.
Equivalent to out-
l
Defective oil temperature sensor or
side temperature
circuit harness
Gradually
increases
After engine warming up
L range, idle
D range, 1st or 3rd speed
ON
ON
l Improperly adjusted servo
Defective servo switch or
circuit harness
D range, 2nd or 4th speed OFF
Defective servo
N range, idle
N range, 2,500 rpm
(tachometer reading)
650-900 rpm
Defective ignition system
l
Defective ignition signal pickup circuit
rpm
harness
Accelerator pedal fully
released
Accelerator pedal slightly
depressed
ON
OFF
l Improperly adjusted accelerator
al switch
Defective accelerator pedal switch
or circuit harness
Accelerator pedal fully
released
Accelerator pedal slightly
depressed
ON
OFF
Improperly adjusted TPS
Defective TPS or circuit harness
D air conditioning
idle-up
D range, air conditioning
idle OFF
ON
OFF
Defective air-conditioning
sor clutch relay ON signal detection
circuit harness
D range, idle
range, idle
C
Defective TCM
l
Defective accelerator pedal switch
circuit
range, 2nd speed
I
2ND
Defective park/neutral position switch
circuit
l
D range, OFF, 3rd speed 3RD
Defective TPS circuit
range, 4th speed 4TH
TSB Revision