Mitsubishi 1989-1993 GALANT Service Manual page 734

23-28
Fault Code Description for 1989 and 1990 model
Fault
Fault code (for voltmeter)
code
21
22
23
24
25
26
27
28
31
32
AUTOMATIC TRANSAXLE - Troubleshooting '
Cause
Abnormal increase of TPS output
Abnormal decrease of TPS output
Incorrect adjustment of the
throttle-position sensor system
Damaged or disconnected wiring
of the oil temperature sensor sys-
Damaged or disconnected wiring
of the kickdown servo switch sys-
Short circuit of the kickdown servo
switch system
Damaged or disconnected wiring
of the ignition pulse pick-up cable
system
Short circuit of the accelerator
switch system or improper adjust-
ment
Malfunction of the microprocessor
First gear command during hrgh-
speed driving
Damaged or disconnected wiring
of the pulse generator B system
TSB Revision
Remedy
Check the throttle position sen-
l
sor connector.
Check the throttle position sen-
l
sor itself.
Adjust the throttle position sen-
l
sor.
Check the accelerator switch
l
(No. 28: output or not).
Check the throttle position sen-
l
sor output circuit harness.
Check the oil temperature sen-
l
sor circuit harness.
Check the oil temperature sen-
l
sor connector.
Check the oil temperature sen-
l
sor itself.
Check the kickdown servo
l
switch output circuit harness.
Check the kickdown servo
l
switch connector.
Check the kickdown servo
l
switch itself.
Check the ignition pulse signal
l
line.
Check the accelerator switch
l
output circuit harness.
Check the accelerator switch
l
connector.
Check the accelerator switch it-
l
self.
l
Replace the control unit.
l
Replace the control unit.
l
Check the pulse generator B
l
output circuit harness.
Check pulse generator B itself.
l
Check the vehicle speed reed
l
switch (for chattering).