Mitsubishi 380. Manual — part 404
AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION
23A-156
STEP 4. Measure the Second solenoid valve resistance at
A/T control solenoid valve assembly connector B-108.
(1) Disconnect connector B-108 and measure at the solenoid
valve side.
(2) Measure the resistance between solenoid valve assembly
connector B-108 terminals 4 and 9.
Resistance value: 2.7
−3.4 Ω [at 20°C (68°F)]
Q: Is the measured resistance 2.7
−3.4 Ω [at 20°C (68°F)]?
YES : Go to Step 6.
NO : Go to Step 5.
STEP 5. Measure the solenoid valve resistance at the
second solenoid valve assembly inside the transmission.
(1) Disconnect connector B-108-2 and measure at the solenoid
valve side.
(2) Measure the resistance between Second solenoid valve
terminals 1 and 2.
Resistance value: 2.7
−3.4 Ω [at 20°C (68°F)]
Q: Is the measured resistance 2.7
−3.4 Ω [at 20°C (68°F)?
YES : Replace the harness wire between A/T control
solenoid valve assembly connector B-108 and the
solenoid valves.
NO : Replace the Second solenoid valve. Refer to GROUP
23B, Valve Body
AC306322
CONNECTOR: B-108
B-108 (GR)
AC
TRANSMISSION
RANGE SWITCH
2
7
1
8
3
9
4
6
10
5
AC210690
2
7
1
8
3
9
4
6
10
5
AB
B-108 HARNESS CONNECTOR:
A/T CONTROL SOLENOID VALVE
ASSEMBLY SIDE
VALVE BODY
ASSEMBLY
10DB108A
CONNECTORS: B-108-2
B-108-2
2
1
AC201141
B-108-2 HARNESS CONNECTOR:
SECOND
SOLENOID VALVE SIDE
BB
AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION
23A-157
STEP 6. 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 7.
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
AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION
23A-158
STEP 7. Check the harness for an open or short circuit to
ground between A/T-ECU connector B-22 terminal 14 and
A/T control solenoid valve assembly connector B-108
terminal 4.
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-159
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
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