Mitsubishi Galant (2004+). Manual — part 636
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-95
Judgement Criteria
• Output speed: no signal change. (4 seconds)
• If DTC 23 (P0720) 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.
Check Conditions
• Transmission range switch position: D, 3, 2 or L.
• Input speed: 500 r/min or more.
• Transmission fluid temperature sensor voltage:
4.5 volts or less.
• Rapid output speed change: -31.9 r/min / 0.016
second or less.
Judgement Criteria
• Output speed: [(input speed - 200 r/min) / gear
ratio] or less. (4 seconds)
• If DTC 23 (P0720) 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, and drive for 5 seconds, with 1st
gear fixed (L range or 1st gear in sport mode), at 20
km/h (12 mph) or more with 50% or more of throttle
valve opening. Then stop the vehicle, and drive
again for 5 seconds, with 1st gear fixed (L range or
1st gear in sport mode), at 20 km/h (12 mph) or more
with 50% or more of throttle valve opening.
.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)
• Malfunction of the output shaft speed sensor
• Malfunction of the transfer drive gear or driven
gear
• 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 23:
Output 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 the data reading mode.
• Item 23: Output Shaft Speed Sensor.
• When driving at a constant speed of 50km/h
(31mph), 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 within the specified range?
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
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-96
STEP 2. Measure the power supply voltage at the output
shaft speed sensor connector B-107.
(1) Disconnect connector B-107 and measure at the harness
side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 3 and ground.
• The voltage should measure battery positive voltage.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage battery positive voltage?
YES : Go to Step 5.
NO : Go to Step 3.
AC305353AC
CONNECTOR: B-107
BATTERY
B-107 (GR)
3
2
1
3 2 1
AC210661
B-107 HARNESS
CONNECTOR:
COMPONENT SIDE
AB
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-97
STEP 3. Check intermediate connector A-13, joint
connector (1) C-01 and junction block connector C-214 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 4.
NO : Repair or replace the damaged components. Refer to
GROUP 00E, Harness Connector Inspection
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
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
AC207120
CONNECTOR: C-214
AU
C-214
6
1
7
2
9
8
10
3
5
12
11
4
1314
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-98
STEP 4. Check the harness for open circuit or short circuit
to ground between the output shaft speed sensor
connector B-107 terminal 3 and the junction block
connector C-214 terminal 12.
Q: Is the harness wire in good condition?
YES : Go to Step 5.
NO : Repair or replace the harness wire.
STEP 5. Measure the PCM to speed sensor output voltage
at the output shaft speed sensor connector B-107.
(1) Disconnect connector B-107 from the speed sensor and
measure voltage at the harness side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 2 and ground.
• The voltage should measure between 4.5 and 4.9 volts.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.5 and 4.9 volts?
YES : Go to Step 11.
NO : Go to Step 6.
AC305353AC
CONNECTOR: B-107
BATTERY
B-107 (GR)
3
2
1
AC207120
CONNECTOR: C-214
AU
C-214
6
1
7
2
9
8
10
3
5
12
11
4
1314
AC305353AC
CONNECTOR: B-107
BATTERY
B-107 (GR)
3
2
1
3 2 1
AC210662
B-107 HARNESS
CONNECTOR:
COMPONENT SIDE
AB
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст