Mitsubishi 380. Manual — part 392
AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION
23A-108
STEP 14. Measure the transmission inhibitor switch 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) Move the selector lever to the "R" position.
(5) Measure the voltage between connector B-22 terminal 23
and ground.
• The voltage should measure below battery positive volt-
age.
(6) 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 15.
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
10DB095A
B-22 HARNESS
CONNECTOR:
AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION
23A-109
STEP 15. 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 16.
NO : Repair or replace the damaged components. Refer to
GROUP 00E, Harness Connector Inspection
STEP 16. Check harness for open circuit or short circuit to
ground between A/T-ECU connector B-22 terminal 23 and
transmission inhibitor switch connector B-110 terminal 7.
Q: Is the harness wire in good condition?
YES : Go to Step 5.
NO : Repair or replace the harness wire.
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
AC210068
CONNECTOR: B-110
B-110 (B)
AE
TRANSMISSION
RANGE SWITCH
1
7
2
8
3
5
9
4
10
6
AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION
23A-110
STEP 17. Check the transmission inhibitor switch.
Measure the resistance between the terminals for each trans-
mission range as indicated in the table below.
Q: Is the measured resistance less than 2 ohms for each
transmission range?
YES : Go to Step 18.
NO : Replace the transmission inhibitor switch. Refer to
GROUP 23B, Transmission
.
STEP 18. Check transmission inhibitor switch connector
B-110 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 19.
NO : Repair or replace the damaged components. Refer to
GROUP 00E, Harness Connector Inspection
TRANSMISSION
RANGE
TERMINAL CONNECTION OF
TESTER
SPECIFIED CONDITION
P
3
− 8, 9 − 10
Less than 2 ohms.
R
7
− 8
N
4
− 8, 9 − 10
D
1
− 8
AC305881
AC305532
AC305679
<F4A4B>
<F4A5A>
AC
TRANSMISSION
RANGE SWITCH
TRANSMISSION
RANGE SWITCH
AC210182AC
P
R
N
D
<F4A5A>
AC210068
CONNECTOR: B-110
B-110 (B)
AE
TRANSMISSION
RANGE SWITCH
1
7
2
8
3
5
9
4
10
6
AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION
23A-111
STEP 19. Measure the transmission inhibitor switch 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) Move the selector lever to the "N" position.
(5) Measure the voltage between connector B-22 terminal 26
and ground.
• The voltage should measure battery positive voltage.
(6) 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 20.
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
10DB096A
B-22 HARNESS
CONNECTOR:
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