Mitsubishi 380. Manual — part 380
AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION
23A-60
STEP 6. Measure the A/T-ECU output voltage to the speed
sensor at the 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 A/T-ECU connector B-22
(terminal 5) and ground.
• The voltage should measure between 4.5 and 4.9 volts.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.5 and 4.9 volts?
YES : Go to Step 7.
NO : Go to Step 9.
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
10DB086A
B-22 CONNECTOR:
AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION
23A-61
STEP 7. Check A/T-ECU connector B-22 and input shaft
speed sensor connector B-109 for loose, corroded or
damaged terminals, or terminals pushed back in the
connector.
Q: Are the connectors in good condition?
YES : Go to Step 8.
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
AC305354
TRANSMISSION
RANGE SWITCH
B-109 (GR)
AC
CONNECTOR: B-109
1
3
2
AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION
23A-62
STEP 8. Check the harness for open circuit or damage
between A/T-ECU connector B-22 terminal 5 and input
shaft speed sensor connector B-109 terminal 2.
Q: Is the harness wire in good condition?
YES : Go to Step 19.
NO : Repair or replace the harness wire.
16DB564A
COVER
AIR
CLEANER
A/T
CONTROL
UNIT
CONNECTORS: B-19, B-22
AC305354
TRANSMISSION
RANGE SWITCH
B-109 (GR)
AC
CONNECTOR: B-109
1
3
2
AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION
23A-63
STEP 9. Check A/T-ECU connector B-22 and input shaft
speed sensor connector B-109 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 damages components. Refer to
GROUP 00E, Harness Connector Inspection
16DB564A
COVER
AIR
CLEANER
A/T
CONTROL
UNIT
CONNECTORS: B-19, B-22
AC305354
TRANSMISSION
RANGE SWITCH
B-109 (GR)
AC
CONNECTOR: B-109
1
3
2
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