Mitsubishi Galant. Manual — part 449

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-263

INVECS-II CANCEL COMMAND

M1231009500059

PCM TERMINAL VOLTAGE REFERENCE CHART FOR TRANSAXLE OPERATION

M1231008400059

L/R SOL

01

Low-reverse solenoid
valve

Drive the solenoid
valve specified by
the scan tool
(MUT-II) at 50 %
duty for five sec-
onds. No other
solenoid valve
should be
energized.

The solenoid
should click when
activated

O/D SOL

04

Overdrive solenoid
valve

TCC SOL

06

Torque converter clutch
solenoid valve

U/D SOL

02

Underdrive solenoid
valve

MUT-II
SCAN TOOL
DISPLAY

ITEM
NO.

INSPECTION ITEM

TEST CONTENT

INSPECTION
REQUIREMENT

NORMAL
CONDITION

MUT-II
SCAN
TOOL
DISPLAY

ITEM
NO.

ITEM

CONTENT

REMARKS

Std.
SHIFT
PATN

14

Standard
shift pat-
tern

Stops the INVECS-II
control and shifts gears
according to the
standard shift pattern.

Use this function when performing procedure 8 in
the road tests. (Refer to

P.23A-17

)

If the ignition switch is turned from "LOCK" (OFF)
to "ON," this function restores the INVECS-II
control.

ACX01182 AB

TERMI-
NAL NO.

INSPECTION ITEMS

INSPECTION REQUIREMENT

NORMAL CONDITION

45

Crankshaft position sen-
sor

Engine: Cranking

0.4

−

4.0 V

Engine: Idling

1.5

−

2.5 V

46

Throttle position sensor
supplied voltage

Ignition switch: ON

4.8

−

5.2 V

50

A/T control relay

Ignition switch: LOCK (OFF)

0 V

Ignition switch: ON

10

−

12 V

57

Throttle position sensor
ground

Always

0.5 V or less

75

Auto-cruise signal

Ignition switch: ON

Battery positive voltage

76

Ground

Always

1 V or less

77

Solenoid valve power
supply

Ignition switch: LOCK (OFF)

0 V

Ignition switch: ON

Battery positive voltage

78

Throttle position sensor

Ignition switch: ON (check
for smooth voltage increase
as throttle is moved from idle
position to wide open throttle

Idle

0.6

−

0.8 V

Wide open
throttle

4.5

−

5.5 V

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-264

88

Ground

Always

1 V or less

89

Solenoid valve power
supply

Ignition switch: LOCK (OFF)

0 V

Ignition switch: ON

Battery positive voltage

97

Ground

Always

1 V or less

101

Park/Neutral position
switch: P

•

Ignition switch: ON

•

Selector lever position: P

Battery positive voltage

•

Ignition switch: ON

•

Selector lever position: Other than
above

0 V

102

Park/Neutral position
switch: D

•

Ignition switch: ON

•

Selector lever position: D

Battery positive voltage

•

Ignition switch: ON

•

Selector lever position: Other than
above

0 V

103

Input shaft speed
sensor

•

Measure between terminals 57 and
103 with an oscilloscope.

•

Engine: 2,000 r/min

•

Gear range: 3rd gear

Refer to

P.23A-266

,

Inspection Procedure
Using an Oscilloscope.

104

Output shaft speed
sensor

•

Measure between terminals 57 and
104 with an oscilloscope.

•

Engine: 2,000 r/min

•

Gear range: 3rd gear

Refer to

P.23A-266

,

Inspection Procedure
Using an Oscilloscope.

106

Second solenoid valve

•

Engine: Idling

•

Gear range: 2nd gear

Battery positive voltage

•

Engine: Idling

•

Selector lever position: P

7

−

9 V

107

Torque converter clutch
solenoid valve

•

Engine: Idling

•

Gear range: 1st gear

Battery positive voltage

108

Park/Neutral position
switch: R

•

Ignition switch: ON

•

Selector lever position: R

Battery positive voltage

•

Ignition switch: ON

•

Selector lever position: Other than
above

0 V

109

Park/Neutral position
switch: 3

•

Ignition switch: ON

•

Selector lever position: 3

Battery positive voltage

•

Ignition switch: ON

•

Selector lever position: Other than
above

0 V

110

Park/Neutral position
switch: L

•

Ignition switch: ON

•

Selector lever operation: L

Battery positive voltage

•

Ignition switch: ON

•

Selector lever operation: Other than
above

0 V

TERMI-
NAL NO.

INSPECTION ITEMS

INSPECTION REQUIREMENT

NORMAL CONDITION

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-265

PCM TERMINAL RESISTANCE AND CONTINUITY INSPECTION CHART

M1231013400044

120

Under drive solenoid
valve

•

Engine: Idling

•

Gear range: 1st gear

Battery positive voltage

•

Engine: Idling

•

Selector lever position: P

7

−

9 V

121

Park/Neutral position
switch: N

•

Ignition switch: ON

•

Selector lever position: N

Battery positive voltage

•

Ignition switch: ON

•

Selector lever position: Other than
above

0 V

122

Park/Neutral position
switch: 2

•

Ignition switch: ON

•

Selector lever operation: 2

Battery positive voltage

•

Ignition switch: ON

•

Selector lever operation: Other than
above

0 V

123

Stoplight switch

•

Ignition switch: ON

•

Brake pedal: Depressed

Battery positive voltage

•

Ignition switch: ON

•

Brake pedal: Released

0 V

124

A/T fluid temperature
sensor

A/T fluid temperature: 20

°

C (68

°

F)

3.8

−

4.0 V

A/T fluid temperature: 40

°

C (104

°

F)

3.2

−

3.4 V

A/T fluid temperature: 80

°

C (176

°

F)

1.7

−

1.9 V

129

Low-reverse solenoid
valve

•

Engine: Idling

•

Selector lever position: P

Battery positive voltage

•

Engine: Idling

•

Gear range: 2nd gear

7

−

9 V

130

Overdrive solenoid
valve

•

Engine: Idling

•

Gear range: 3rd gear

Battery positive voltage

•

Engine: Idling

•

Selector lever position: P

7

−

9 V

TERMI-
NAL NO.

INSPECTION ITEMS

INSPECTION REQUIREMENT

NORMAL CONDITION

ACX01978

ACX01978AC

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-266

INSPECTION PROCEDURE USING AN OSCILLOSCOPE

M1231008500056

Waveform sample

TERMINAL
NO.

INSPECTION ITEM

NORMAL CONDITION (CHECK CONDITION)

57

−

124

A/T fluid temperature sensor

16.7

−

20.5 kW [at 0

°

C (32

°

F)]

7.3

−

8.9 kW [at 20

°

C (68

°

F)]

3.4

−

4.2 kW [at 40

°

C (104

°

F)]

1.9

−

2.2 kW [at 60

°

C (140

°

F)]

1.0

−

1.2 kW [at 80

°

C (176

°

F)]

0.57

−

0.69 kW [at 100

°

C (212

°

F)]

TERMI-
NAL NO.

INSPECTION ITEM

INSPECTION REQUIREMENT

NORMAL
CONDITION
(WAVEFORM
SAMPLE)

45

Crankshaft position
sensor

Selector lever position: N

Idling (Vehicle stopped)

Waveform A

103

Input shaft speed
sensor

Selector lever position: 3

Driving at constant speed
of 50 km/h (31 mph) in
3rd gear (2.4L Engine:
1,600

−

1,900 r/min, 3.0L

Engine: 1,300

−

1,600 r/

min)

Waveform B

104

Output shaft speed
sensor

80

Vehicle speed sensor

Waveform C

129

Low-reverse solenoid
valve

•

Ignition switch: ON

•

Selector lever position:
P

•

Engine: Stopped

•

Throttle (Accelerator)
opening angle: Less
than 1 Volt

Force drive each solenoid
valve (Actuator test)

Waveform D

120

Underdrive solenoid
valve

106

Second solenoid valve

130

Overdrive solenoid
valve

107

Torque converter
clutch control solenoid

AC001872

Waveform A

AB

(V)

(ms)

AC001873

(V)

(ms)

Waveform B

AB

AC001874AB

Waveform C

(V)

(ms)

AC001875

Waveform D

AB

(V)

(ms)