Mitsubishi Galant 9G. Manual — part 534
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-214
STEP 2. Using scan tool MB991958, read the A/T
diagnostic trouble code.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Check for A/T diagnostic trouble code.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC 54 set? (DTC 54 may be set along with multiple
DTC 54: A/T Control Relay
System.
NO : Go to Step 3.
STEP 3. Using scan tool MB991958, read the A/T
diagnostic trouble code.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Check for A/T diagnostic trouble code.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Are DTC 32 and DTC 34 set? (Multiple DTCs may be set).
YES : Go to Step 8.
NO : Go to Step 4.
AC305412
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
AC305412
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-215
STEP 4. Measure the Second solenoid valve resistance at
A/T control solenoid valve assembly connector B-108.
(1) Disconnect connector B-108 and measure at the solenoid
valve side.
(2) Measure the resistance between solenoid valve assembly
connector B-108 terminals 4 and 9.
Resistance value: 2.7
−3.4 Ω [at 20°C (68°F)]
Q: Is the measured resistance 2.7
−3.4 Ω [at 20°C (68°F)]?
YES : Go to Step 6.
NO : Go to Step 5.
STEP 5. Measure the solenoid valve resistance at the
second solenoid valve assembly inside the transaxle.
(1) Disconnect connector B-108-2 and measure at the solenoid
valve side.
(2) Measure the resistance between Second solenoid valve
terminals 1 and 2.
Resistance value: 2.7
−3.4 Ω [at 20°C (68°F)]
Q: Is the measured resistance 2.7
−3.4 Ω [at 20°C (68°F)?
YES : Replace the harness wire between A/T control
solenoid valve assembly connector B-108 and the
solenoid valves.
NO : Replace the Second solenoid valve. Refer to GROUP
.
AC306322
CONNECTOR: B-108
B-108 (GR)
AC
TRANSMISSION
RANGE SWITCH
2
7
1
8
3
9
4
6
10
5
AC210690
2
7
1
8
3
9
4
6
10
5
AB
B-108 HARNESS CONNECTOR:
A/T CONTROL SOLENOID VALVE
ASSEMBLY SIDE
AC002219
CONNECTOR: B-108-2
BY
B-108-2
VALVE BODY
ASSEMBLY
2
1
AC201141
B-108-2 HARNESS CONNECTOR:
SECOND
SOLENOID VALVE SIDE
BB
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-216
STEP 6. Check PCM connector B-21 and A/T control
solenoid valve assembly connector B-108 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Are the connectors and terminals in good condition?
YES : Go to Step 7.
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
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-217
STEP 7. Check the harness for an open or short circuit to
ground between PCM connector B-21 terminal 66 and A/T
control solenoid valve assembly connector B-108 terminal
4.
Q: Is the harness wire in good condition?
YES : Replace the PCM.
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
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