Mitsubishi Galant 9G. Manual — part 497
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-66
STEP 7. Measure the sensor output voltage at PCM
connector B-21 by using check harness special tool
MB991923.
(1) Disconnect all the connectors from the PCM.
(2) Connect special tool MB991923 (check harness) between
the PCM and the body-side harness connector.
(3) Turn the ignition switch to the "ON" position.
AC306248AC
B-21
(B)
CONNECTOR: B-21
PCM
AIR
CLEANER
73
80
54
67
60
71 72
77 78 79
64
51
59
58
65
52
66
53
75
74
76
81 82
83
63
JAE
62
68
61
55
69
56
70
57
AC209793AG
SPECIAL TOOL 33-PIN CONNECTOR
(PCM CONNECTOR B-21)
B-21
(GR)
55
56
54 53 52 51
57
62 61 60 59 58
63
69 68 67 66 65 64
70
75 74 73 72 71
76
82 81 80 79 78 77
83
PCM
MB991923
BODY SIDE
HARNESS
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-67
(4) Measure the voltage between terminal 74 and ground.
• When transmission fluid temperature is 20°C (68°F),
voltage should measure between 3.8 and 4.0 volts.
• When transmission fluid temperature is 40°C (104°F),
voltage should measure between 3.2 and 3.4 volts.
• When transmission fluid temperature is 80°C (176°F),
voltage should measure between 1.7 and 1.9 volts.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage within the specified range?
YES : Go to Step 6.
NO : Go to Step 8.
STEP 8. Check PCM connector B-21 for loose, corroded or
damaged terminals, or terminals pushed back in the
connector.
Q: Are the connector and terminals in good condition?
YES : Go to Step 9.
NO : Repair or replace the damaged components. Refer to
GROUP 00E, Harness Connector Inspection
AC210334
51
58
71
64
77
76
83
70
63
57
73 72
75 74
80
82 81
79 78
54
67
JAE
62
69
56
61
68
55
59
66
60
53
65
52
AD
B-21 HARNESS
CONNECTOR:
COMPONENT SIDE
AC306248AC
B-21
(B)
CONNECTOR: B-21
PCM
AIR
CLEANER
73
80
54
67
60
71 72
77 78 79
64
51
59
58
65
52
66
53
75
74
76
81 82
83
63
JAE
62
68
61
55
69
56
70
57
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-68
STEP 9. Check the harness for a short circuit to ground
between PCM connector B-21 terminal 74 and A/T control
solenoid valve connector B-108 terminal 1.
Q: Is the harness wire in good condition?
YES : Go to Step 6.
NO : Repair or replace the harness wire.
AC306248AC
B-21
(B)
CONNECTOR: B-21
PCM
AIR
CLEANER
73
80
54
67
60
71 72
77 78 79
64
51
59
58
65
52
66
53
75
74
76
81 82
83
63
JAE
62
68
61
55
69
56
70
57
AC306322
CONNECTOR: B-108
B-108 (GR)
AC
TRANSMISSION
RANGE SWITCH
2
7
1
8
3
9
4
6
10
5
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-69
DTC 22 (P0715): Input Shaft Speed Sensor System
POWERTRAIN
CONTROL MODULE
JOINT
CONNECTOR (1)
JUNCTION
BLOCK
JUNCTION
BLOCK
INPUT SHAFT
SPEED SENSOR
IGNITION
SWITCH (IG1)
AC209755AC
Input Shaft Speed Sensor System Circuit
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