Mitsubishi Galant. Manual — part 430

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-187

STEP 5. Check harness for damage between solenoid
valve assembly connector B-38 terminal 7 and PCM
connector C-42 terminal 107.
Q: Is the harness wire in good condition?

YES : Go to Step 6.
NO : Repair it.

STEP 6. Check connector A-19X at A/T control relay for
damage.
Q: Is the connector in good condition?

YES : Go to Step 7.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

.

ACX02479

CONNECTOR: B-38

AF

AC004197

PCM

AF

CONNECTOR: C-42

AC004286 AC

A/T CONTROL
RELAY

BATTERY

CONNECTOR: A-19X

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-188

STEP 7. Check harness for damage between solenoid
valve assembly connector B-38 terminal 10 and A/T control
relay connector A-19X terminal 3.
Q: Is the harness wire in good condition?

YES : Go to Step 8.
NO : Repair it.

STEP 8. Using scan tool MB991502, check actuator test
item 06: Torque Converter Clutch Solenoid Valve.

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to data link connector.
(2) Turn the ignition switch to "ON" position.
(3) Set scan tool MB991502 to the actuator test mode for item

06: Torque Converter Clutch Solenoid Valve.

•

An operation sound should be heard from solenoid
valve when the torque converter clutch solenoid valve is
operated.

(4) Turn the ignition switch to "LOCK" (OFF) position.

Q: Is the solenoid valve operating properly?

YES : This malfunction is intermittent. Refer to GROUP 00,

How to Use Troubleshooting/Inspection Service
Points

−

How to Cope with Intermittent Malfunction

P.00-8

.

NO : Replace the PCM.

ACX02479

CONNECTOR: B-38

AF

AC004286 AC

A/T CONTROL
RELAY

BATTERY

CONNECTOR: A-19X

AC003081AC

MB991502

DATA LINK
CONNECTOR

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

23A-189

STEP 9. Check connector B-38 at solenoid valve assembly
for damage.
Q: Is the connector in good condition?

YES : Go to Step 10.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

.

STEP 10. Check the torque converter clutch solenoid valve
at solenoid valve assembly connector B-38.
(1) Disconnect connector B-38 and measure at the solenoid

valve side.

(2) Measure the resistance between terminal 7 and 10.

Standard value: 2.7

−−−−

3.4

Ω

Ω

Ω

Ω

Q: Is the resistance at the standard value?

YES : Go to Step 11.
NO : Replace the torque converter clutch solenoid valve.

Refer to GROUP 23B, Valve Body

P.23B-68

.

ACX02479

CONNECTOR: B-38

AF

ACX02479

CONNECTOR: B-38

AF

AC001975

HARNESS
CONNECTOR: B-38

AE

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-190

STEP 11. Check the power supply voltage at solenoid
valve assembly connector B-38.
(1) Disconnect connector B-38 and measure at the harness

side.

(2) Turn the ignition switch to "ON" position.

(3) Measure the voltage between terminal 10 and ground.

•

Voltage should be battery positive voltage.

(4) Turn the ignition switch to "LOCK" (OFF) position.

Q: Is the voltage normal?

YES : Go to Step 13.
NO : Go to Step 12.

STEP 12. Check connector A-19X at A/T control relay for
damage.
Q: Is the connector in good condition?

YES : Repair it because of harness open circuit or short

circuit to ground between solenoid valve assembly
connector B-38 terminal 10 and A/T control relay
connector A-19X terminal 3.

NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

.

STEP 13. Check connector C-42 at PCM connector for
damage.
Q: Is the connector in good condition?

YES : Go to Step 14.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

.

ACX02479

CONNECTOR: B-38

AF

AC001966

HARNESS
CONNECTOR: B-38

AE

AC004286 AC

A/T CONTROL
RELAY

BATTERY

CONNECTOR: A-19X

AC004197

PCM

AF

CONNECTOR: C-42