Mitsubishi 380. Manual — part 402
AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION
23A-148
STEP 7. Check the harness for an open or short circuit to
ground between A/T-ECU connector B-22 terminal 1 and
A/T control solenoid valve assembly connector B-108
terminal 3.
Q: Is the harness wire in good condition?
YES : Replace the A/T-ECU.
NO : Repair or replace the harness wire.
16DB564A
COVER
AIR
CLEANER
A/T
CONTROL
UNIT
CONNECTORS: B-19, B-22
AC306322
CONNECTOR: B-108
B-108 (GR)
AC
TRANSMISSION
RANGE SWITCH
2
7
1
8
3
9
4
6
10
5
AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION
23A-149
STEP 8. Measure the supply voltage at A/T control
solenoid valve assembly connector B-108.
(1) Disconnect solenoid valve assembly harness connector
B-108.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between harness connector B-108
terminal 9 and ground.
• The voltage should equal 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 11.
NO : Go to Step 9.
STEP 9. Check A/T control relay connector B-16X in the
engine component relay box and A/T control solenoid
valve assembly connector B-108 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 10.
NO : Repair or replace the damaged components. Refer to
GROUP 00E, Harness Connector Inspection
AC306322
CONNECTOR: B-108
B-108 (GR)
AC
TRANSMISSION
RANGE SWITCH
2
7
1
8
3
9
4
6
10
5
AC210680
2
5
6
10
4
9
3
8
1
7
AB
B-108 HARNESS
CONNECTOR:
COMPONENT SIDE
10DB098A
RELAY BOX
CONNECTOR: B-16X
2
1
3 4
FRONT OF
VEHICLE
AC306322
CONNECTOR: B-108
B-108 (GR)
AC
TRANSMISSION
RANGE SWITCH
2
7
1
8
3
9
4
6
10
5
AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION
23A-150
STEP 10. Check the harness for an open circuit or short
circuit to ground between A/T control relay connector
B-16X terminal 4 in the engine component relay box and
A/T control solenoid valve assembly connector B-108
terminal 9.
Q: Is the harness wire in good condition?
YES : Go to Step 11.
NO : Repair or replace the harness wire.
AC306354
RELAY BOX
AB
CONNECTOR: B-16X
2
1
3 4
FRONT OF
VEHICLE
AC306322
CONNECTOR: B-108
B-108 (GR)
AC
TRANSMISSION
RANGE SWITCH
2
7
1
8
3
9
4
6
10
5
AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION
23A-151
STEP 11. Check A/T-ECU connector B-22 and A/T control
solenoid valve assembly connector B-108 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 12.
NO : Repair or replace the damaged components. Refer to
GROUP 00E, Harness Connector Inspection
16DB564A
COVER
AIR
CLEANER
A/T
CONTROL
UNIT
CONNECTORS: B-19, B-22
AC306322
CONNECTOR: B-108
B-108 (GR)
AC
TRANSMISSION
RANGE SWITCH
2
7
1
8
3
9
4
6
10
5
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