Mitsubishi 380. Manual — part 418
AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION
23A-212
STEP 9. Check the harness for open circuit or short circuit
to ground between A/T control relay connector B-16X
terminal 2 in the engine component relay box and junction
block connector C-214 terminal 12.
Q: Is the harness wire in good condition?
YES : Go to Step 15.
NO : Repair or replace the harness wire.
10DB085A
CONNECTOR: C-214
6
1
7
2
9
8
10
3
5
12
11
4
1314
10DB098A
RELAY BOX
CONNECTOR: B-16X
2
1
3 4
FRONT OF
VEHICLE
AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION
23A-213
STEP 10. Measure the A/T control relay output voltage at
A/T-ECU connector B-22 by using check harness special
tool MB992045.
(1) Disconnect all the connectors from the A/T-ECU.
(2) Connect special tool MB992045 (check harness) between
the A/T-ECU and the body-side harness connector.
(3) Turn the ignition switch to the "ON" position.
(4) Measure the voltage between connector B-22 terminal 3
and ground.
• The measured voltage should equal battery positive
voltage.
16DB564A
COVER
AIR
CLEANER
A/T
CONTROL
UNIT
CONNECTORS: B-19, B-22
10DB161A
A/T-ECU CHECK HARNESS
MB992045
A/T-ECU
A/T-ECU CHECK
HARNESS
CONNECTORS
10DB120A
B-22 HARNESS
CONNECTOR:
AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION
23A-214
(5) Measure the voltage between connector B-22 terminal 9
and ground.
• The measured voltage should equal battery positive
voltage.
(6) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage equal to battery positive
voltage between terminal 3 and ground, and between
terminal 9 and ground?
YES : Go to Step 13.
NO : Go to Step 11.
STEP 11. Check A/T-ECU connector B-22 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 12.
NO : Repair or replace the damaged components. Refer to
GROUP 00E, Harness Connector Inspection
10DB121A
B-22 HARNESS
CONNECTOR:
16DB564A
COVER
AIR
CLEANER
A/T
CONTROL
UNIT
CONNECTORS: B-19, B-22
AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION
23A-215
STEP 12. Check harness for 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-ECU connector B-22 (terminals 3 and 9).
Q: Is the harness wire in good condition?
YES : Go to Step 15.
NO : Repair or replace the harness wire.
STEP 13. Check A/T-ECU connector B-22 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 14.
NO : Repair or replace the damaged components. Refer to
GROUP 00E, Harness Connector Inspection
10DB098A
RELAY BOX
CONNECTOR: B-16X
2
1
3 4
FRONT OF
VEHICLE
16DB564A
COVER
AIR
CLEANER
A/T
CONTROL
UNIT
CONNECTORS: B-19, B-22
16DB564A
COVER
AIR
CLEANER
A/T
CONTROL
UNIT
CONNECTORS: B-19, B-22
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