Mitsubishi Galant 9G. Manual — part 498
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-70
AC306223
A-13 (GR)
AB
CONNECTOR: A-13
1
4
7
8
2 3
5
13
14
17
15
12
16
11
10
9
6
AC306248AE
B-22
(B)
CONNECTOR: B-22
PCM
AIR
CLEANER
JAE
94
98
107
103
112
91
100
109
101102
106
110
105
111
97
92
96
93
104
113
108
95
99
AC305354
TRANSMISSION
RANGE SWITCH
B-109 (GR)
AC
CONNECTOR: B-109
1
3
2
AC305231
CONNECTOR: C-01
AS
33
22
11
28
17
16
15
14
13
12
25
2324
2627
3
1 2
4 5
21
20
19
18
29 30
32
31
7
6
8
10
9
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-71
.
CIRCUIT OPERATION
• The input shaft speed sensor generates 0 ⇔ 5
volts pulse signal when the input shaft rotates.
The pulse signal frequency increases with a rise
in input shaft speed.
• The input shaft speed sensor is connected to the
PCM (terminals 111 and 113) via the input shaft
speed sensor connector (terminals 1 and 2).
• The PCM detects the input shaft speed by the
signal input to terminal 111.
• The input shaft speed sensor generates the pulse
signal as the teeth of the underdrive clutch
retainer pass the magnetic tip of the sensor.
.
DESCRIPTIONS OF MONITOR METHODS
• If there is no detection pulse from input shaft
speed sensor (turbine rotation) even during driv-
ing test at more than specified speed, PCM
judges that input shaft speed sensor has a fail-
ure.
.
MONITOR EXECUTION
• Continuous
.
MONITOR EXECUTION CONDITIONS
(OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
• DTC 23 (P0720): Output shaft speed sensor mal-
function
Sensor (The sensor below is determined to be
normal)
• Output shaft speed sensor
.
AC207134
C-214
C-215
CONNECTORS: C-214, 215
AO
1
3 4
2
6
5
C-214
C-215
6
1
7
2
9
8
10
3
5
12
11
4
1314
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-72
LOGIC FLOW CHARTS (Monitor Sequence)
.
DTC SET CONDITIONS
Check Conditions
• Transmission range switch position: D, 3, 2 or L.
• Output speed: 1,000 r/min or more.
• Transmission fluid temperature sensor voltage:
4.5 volts or less.
Judgement Criteria
• Input shaft speed sensor signal: no signal
change. (4 seconds)
• If DTC 22 (P0715) is set consecutively four times,
the transaxle is locked into 3rd gear or 2nd gear
as a fail-safe measure, and the "N" range light
flashes once per second.
.
OBD-II DRIVE CYCLE PATTERN
Start the engine, shift to 3rd gear or higher, and drive
at 40 km/h (25 mph) or more for 10 seconds.
.
AC205224
N
E
:
Engine speed
START
Yes
No
Transmission fluid
temperature sensor
voltage < 4.5 V
Transmission range
switch position is in
D, 3, 2 or L range
Shift stage is 1st or 2nd
and N
E
< 2,600 r/min
N
OPG-B
> 1,000 r/min
Yes
No
Yes
No
Yes
No
Pulses of input shaft speed
sensor are not inputted
Continuous failure for 4 secs.
Good
Malfunction
END
Yes
No
Yes
No
N
OPG-B
: Output speed
(output shaft speed sensor)
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-73
TROUBLESHOOTING HINTS (THE MOST
LIKELY CAUSES FOR THIS CODE TO BE
SET ARE:)
• Malfunction of the input shaft speed sensor
• Malfunction of the underdrive clutch retainer
• Damaged harness or connector
• Malfunction of the PCM
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. Using scan tool MB991958, check data list item 22:
Input Shaft Speed Sensor.
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) Start the engine.
(3) Set scan tool MB991958 to data reading mode.
• Item 22: Input Shaft Speed Sensor.
• When driving at constant speed of 50 km/h (31
mph), the display should be "1,400
− 1,700 r/min"
(Gear range: 3rd gear).
(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 2.
AC305412
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
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