Mitsubishi Montero (2002-2004). Manual — part 914
DIAGNOSTIC TROUBLE CODE PROCEDURES <AUTOMATIC TRANSMISSION>
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DIAGNOSTIC TROUBLE CODE PROCEDURES
23Ac-139
STEP 25. Using scan tool MB991502, check data list item
61: Transmission Range Switch.
CAUTION
To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991502 to the data reading mode for item
61, Transmission Range Switch.
• Move the selector lever to "P," "R," "N," "D" and sport
mode positions and confirm that the selected transmis-
sion ranges match the positions. (Sport mode is indi-
cated as "D" on scan tool MB991502.)
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the switch operating properly?
YES : It can be assumed 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.
ACX01539AD
MB991502
16-PIN
DIAGNOSTIC TROUBLE CODE PROCEDURES <AUTOMATIC TRANSMISSION>
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DIAGNOSTIC TROUBLE CODE PROCEDURES
23Ac-140
DTC 29: Vehicle Speed Sensor System
AC205193 AB
Vehicle Speed Sensor System Circuit
AC204170
CONNECTOR : D-03
CE
D-03 (GR)
58
57
67
66
56
54 55
64
59
53
52
62
61
63
65
60
51
AC204171
CONNECTOR : D-116
AN
9 10
8
6 7
31 32
30
29
18 19 20 21
5
4
2
1
3
27
26
24
23
25
12 13 14 15 16 17
28
11
22
33
DIAGNOSTIC TROUBLE CODE PROCEDURES <AUTOMATIC TRANSMISSION>
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DIAGNOSTIC TROUBLE CODE PROCEDURES
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.
CIRCUIT OPERATION
• 4.8 − 5.2 volts voltage is applied to the vehicle
speed sensor from the PCM (terminal 79). The
vehicle speed sensor generates a pulse signal
when the output terminal is opened and ground.
• The PCM compares the vehicle speed sensor
signal to input shaft and output shaft speed sen-
sor signals.
• If the vehicle speed sensor becomes inoperative,
the transmission will not shift normally.
.
DTC SET CONDITIONS
• If the PCM detects no pulse signal from the vehi-
cle speed sensor for continuous period of 30 sec-
onds under following conditions, it is judged as a
vehicle sensor system malfunction and DTC 29 is
set.
• Driving forward
• Output shaft speed is 900 r/min or more
.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)
• Malfunction of the vehicle speed sensor circuit
• Damaged harness, connector
• Malfunction of the PCM
AC204681AC
CONNECTOR: D-134
D-134 (GR)
61 62
63 64
65 66 67 68 69 70 71 72 73
82
89
81
88
80
79
78
77
87
86
85
76
75
74
84
83
AC204176
CONNECTOR : E-111
BF
15
4
14
37
36
26 27
12
11
35
34
23 24
3
13
25
9
2
8
32
20 21
6
5
17
29
30
18
1
7
19
31
10
22
33
16
28
38
DIAGNOSTIC TROUBLE CODE PROCEDURES <AUTOMATIC TRANSMISSION>
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DIAGNOSTIC TROUBLE CODE PROCEDURES
23Ac-142
DIAGNOSIS
Required Special Tool:
• MB991502: Scan Tool (MUT-II)
STEP 1. Check the speedometer.
Q: Is the speedometer operating properly?
YES : Go to Step 2.
NO : Check the vehicle speed sensor. Refer to GROUP
54A, Combination Meters Assembly and Vehicle
Speed Sensor .
STEP 2. Using scan tool MB991502, check data list item 29:
Vehicle Speed Sensor.
CAUTION
To prevent damage to scan tool MB991502, always turn the
ignition switch to "LOCK" (OFF) position before connect-
ing or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Start the engine.
(3) Set scan tool MB991502 to data reading mode for item 29,
Vehicle Speed Sensor.
• Check that the speedometer and scan tool MB991502
display speed match when driving at a vehicle speed of
40 km/h (25 mph).
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?
YES : It can be assumed that this malfunction is intermittent.
Refer to GROUP 00, How to Use Troubleshooting/
Inspection Service Points
− How to Cope with
Intermittent Malfunction
NO : Go to Step 3.
ACX01539AD
MB991502
16-PIN
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