Mitsubishi Galant 9G. Manual — part 522
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-166
LOGIC FLOW CHARTS (Monitor Sequence)
.
DTC SET CONDITIONS
Check Conditions, Judgement Criteria
• Transmission range switch: multiple signal. (30
seconds)
.
OBD-II DRIVE CYCLE PATTERN
Start the engine, keep the vehicle stopped in "P," "R,"
"N," "D," "3," "2" and "L" ranges respectively for more
than one minute, and turn "LOCK" (OFF) the ignition
switch. Then restart the engine, and stop the vehicle
in "P," "R," "N," "D," "3," "2" and "L" ranges respec-
tively for more than one minute.
.
TROUBLESHOOTING HINTS (THE MOST
LIKELY CAUSES FOR THIS CODE TO BE
SET ARE:)
• Malfunction of the transmission range switch cir-
cuit
• Damaged harness or connector
• Malfunction of the PCM
AC205064
START
Is there no
input signal?
Yes
No
Continuous failure
for 30 secs.
Yes
Yes
Yes
No
No
No
Continuous failure
for 30 secs.
Is there more than
one input signal?
Malfunction
Good
Malfunction
END
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-167
DIAGNOSIS
Required Special Tool:
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: MUT-III USB Cable
• MB991910: MUT-III Main harness A
STEP 1. Check the transmission range switch.
Measure the resistance between the terminals for each trans-
mission range as indicated in the table below.
NOTE: For vehicles with sport mode, four positions (P, R, N, D)
are used.
Q: Does the resistance measure less than 2 ohms for each
selector position?
YES : Go to Step 2.
NO : Replace the transmission range switch. Refer to
GROUP 23B, Transaxle
TRANSMISSION
RANGE
TERMINAL CONNECTION OF
TESTER
SPECIFIED CONDITION
P
3
− 8, 9 − 10
Less than 2 ohms.
R
7
− 8
N
4
− 8, 9 − 10
D
1
− 8
3
5
− 8
2
2
− 8
L
6
− 8
AC305881
AC305532
AC305679
<F4A4B>
<F4A5A>
AC
TRANSMISSION
RANGE SWITCH
TRANSMISSION
RANGE SWITCH
AC304078
P
R
N
D
<F4A4B>
AC
3
2
L
AC210182AC
P
R
N
D
<F4A5A>
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-168
STEP 2. Check transmission range switch connector B-110
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 3.
NO : Repair or replace the damaged components. Refer to
GROUP 00E, Harness Connector Inspection
STEP 3. 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 4.
NO : Repair or replace the damaged components. Refer to
GROUP 00E, Harness Connector Inspection
AC210068
CONNECTOR: B-110
B-110 (B)
AE
TRANSMISSION
RANGE SWITCH
1
7
2
8
3
5
9
4
10
6
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-169
STEP 4. Measure the transmission range switch output
voltage at PCM connector B-21 by using check harness
special tool MB991923. ("P" position)
(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
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