Mitsubishi Galant (2004+). Manual — part 682
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-279
STEP 12. Check harness for open circuit or short circuit to
ground between A/T control relay connector B-16X
(terminal 4) in the engine component relay box and PCM
connector B-21 (terminals 57 and 70).
Q: Is the harness wire in good condition?
YES : Go to Step 15.
NO : Repair or replace the harness wire.
AC306354
RELAY BOX
AB
CONNECTOR: B-16X
2
1
3
4
FRONT OF
VEHICLE
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-280
STEP 13. 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 14.
NO : Repair or replace the damaged components. Refer to
GROUP 00E, Harness Connector Inspection
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-281
STEP 14. Check harness for open circuit or short circuit to
ground between A/T control relay connector B-16X
terminal 3 in the engine component relay box and PCM
connector B-21 terminal 82.
Q: Is the harness wire in good condition?
YES : Go to Step 15.
NO : Repair or replace the harness wire.
AC306354
RELAY BOX
AB
CONNECTOR: B-16X
2
1
3
4
FRONT OF
VEHICLE
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-282
STEP 15. Using scan tool MB991958, check data list item
54: A/T control relay output Voltage.
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to the data reading mode.
• Item 54: A/T Control Relay Output Voltage.
• The voltage should equal battery positive voltage.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage equal battery positive voltage?
YES : It can be that this malfunction is intermittent. Refer to
GROUP 00, How to Use Troubleshooting/Inspection
Service Points
− How to Cope with Intermittent
Malfunction
NO : Replace the PCM.
AC305412
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
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