Mitsubishi Galant 9G. Manual — part 565
AUTOMATIC TRANSAXLE DIAGNOSIS
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AUTOMATIC TRANSAXLE
23A-338
STEP 26. Check PCM connector B-20 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
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
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AUTOMATIC TRANSAXLE
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INSPECTION PROCEDURE 16: Shift Position Indicator Light System <Vehicles with Sport Mode>
.
WITHOUT ELECTRONIC
BRAKE-FORCE
DISTRIBUTION (EBD)
AND ANTI-LOCK
BRAKING SYSTEM
(ABS)
WITHOUT ELECTRONIC
BRAKE-FORCE
DISTRIBUTION (EBD)
AND ANTI-LOCK
BRAKING SYSTEM
(ABS)
WITH ELECTRONIC
BRAKE-FORCE
DISTRIBUTION (EBD)
AND ANTI-LOCK
BRAKING SYSTEM
(ABS)
WITH ELECTRONIC
BRAKE-FORCE
DISTRIBUTION (EBD)
AND ANTI-LOCK
BRAKING SYSTEM
(ABS)
JOINT
CONNECTOR (4)
POWERTRAIN
CONTROL
MODULE
ABS-ECU
CPU
RHEOSTAT CIRCUIT
COMBINATION
METER
AC209763AC
Communication circuit (CAN Communcation Line) between PCM and Combination Meter
JOINT
CONNECTOR (3)
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-340
CIRCUIT OPERATION
• The PCM detects the transmission range ("P,"
"R," "N," "D," sport mode "4," "3," "2," or "1"), and
display it on the combination meter.
.
COMMENT
Connector(s), wiring harness in the CAN bus line
between the PCM and the combination meter, power
supply to the PCM, the combination meter, the PCM
may be defective.
.
TROUBLESHOOTING HINTS (The most
likely causes for this condition:)
• Malfunction of the combination meter
• 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. Using scan tool MB991958, diagnose the CAN bus
line.
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.
Use scan tool MB991958 to diagnose the CAN bus lines.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the check result properly?
YES : Go to Step 2.
NO : Repair the CAN bus lines (Refer to GROUP 54C,
Diagnosis-CAN Bus Diagnostic Chart
AC305412
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
AUTOMATIC TRANSAXLE DIAGNOSIS
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AUTOMATIC TRANSAXLE
23A-341
STEP 2. Using scan tool MB991958, read the MFI
diagnostic trouble code.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Check for MFI diagnostic trouble code.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC U1108 set?
YES : Refer to GROUP 13A <2.4L Engibe>, Diagnostic
Trouble Code Procedures
DTC U1108:
Combination Meter-ECU CAN Communication Time
Out or refer to GROUP 13B <3.8L Engibe>,
Diagnostic Trouble Code Procedures
DTC U1108: Combination Meter-ECU CAN
Communication Time Out.
NO : Replace the PCM.
AC305412
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
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