Mitsubishi Galant 9G. Manual — part 557
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-306
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 actuator test
item 14: INVECS-II Cancel Command.
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 actuator test mode.
• Item14: INVECS-II Cancel Command.
• Drive the vehicle and confirm the gear shifting corre-
spond to the standard shift line of the shift pattern
diagram. Refer to
.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Does the gear shifting correspond to the standard shift
line of the shift pattern diagram?
YES : The symptom is due to characteristics of the
INVECS-II system, but is not abnormal.
NO : Go to Step 2.
STEP 2. Check the shift points.
Q: Are the shift points early or late only when transmission
fluid is -29
°C (84°F) or less (early), or 125°C (257°F) or
more (late)?
YES : The symptom is due to characteristics of the
INVECS-II system, but is not abnormal.
NO : Go to Step 3.
STEP 3. Disassemble and clean the valve body.
Check the O-ring installation bolts for looseness and the valve
body for damage. Repair or replace the faulty parts. Refer to
GROUP 23B, Valve Body
Replace the valve body assembly if the damages are thought
to be irreparable. Then check the symptom.
Q: Is the symptom eliminated?
YES : The procedure is complete.
NO : Go to Step 4.
AC305412
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
AC001860 AB
VALVE
BODY
ASSEMBLY
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-307
STEP 4. Replace the PCM.
Q: Is the symptom eliminated?
YES : The procedure is complete.
NO : Start over at Step 1.
INSPECTION PROCEDURE 12: No Diagnostic Trouble Codes (Does not Shift)
POWERTRAIN
CONTROL
MODULE
RELAY
BOX
BATTERY
BATTERY
BACKUP
AC210058AC
Backup Power Supply System Circuit
AC306248AH
CONNECTOR: B-20
PCM
AIR
CLEANER
JAE
41
37
32
40
39
23
21 22
35
31
30
26
36
27
43
42
25
24
38
34
29
33
28
B-20
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-308
.
CIRCUIT OPERATION
PCM (terminal number 42) receives battery positive
voltage from the battery.
.
COMMENT
If shifting does not occur while driving and no diag-
nostic trouble codes are output, a malfunction of the
transmission range switch, or PCM may exist.
.
TROUBLESHOOTING HINTS (The most
likely causes for this condition:)
• Malfunction of the transmission range switch
• Damaged harness, 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. Check the vehicle acceleration.
Q: Does the vehicle accelerate poorly (transaxle stays in
3rd gear) when starting from a stop with the selector
lever in "D" range?
YES : Go to Step 2.
NO : Go to Step 5.
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-309
STEP 2. Measure the backup power supply voltage at PCM
connector B-20 by using check harness special tool
MB991923.
(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.
AC306248AH
CONNECTOR: B-20
PCM
AIR
CLEANER
JAE
41
37
32
40
39
23
21 22
35
31
30
26
36
27
43
42
25
24
38
34
29
33
28
B-20
AC209793AK
SPECIAL TOOL 23-PIN CONNECTOR
WITHOUT RED TAPE
(PCM CONNECTOR B-20)
B-20
(GR)
25
21
24 23 22
29 28 27 26
34 33 32 31 30
38 37 36 35
43 42 41 40 39
PCM
MB991923
BODY SIDE
HARNESS
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст