Mitsubishi Galant. Manual — part 425
AUTOMATIC TRANSAXLE DIAGNOSIS
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AUTOMATIC TRANSAXLE
23A-167
STEP 7. Check harness for damage between solenoid
valve assembly connector B-38 terminal 9 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 02: Underdrive 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
02: Underdrive Solenoid Valve.
•
An operation sound should be heard from solenoid
valve when the underdrive 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
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-168
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
.
STEP 10. Check the underdrive 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 3 and 9.
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 underdrive solenoid valve. Refer to
GROUP 23B, Valve Body
.
ACX02479
CONNECTOR: B-38
AF
ACX02479
CONNECTOR: B-38
AF
AC001962
HARNESS
CONNECTOR: B-38
AE
AUTOMATIC TRANSAXLE DIAGNOSIS
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AUTOMATIC TRANSAXLE
23A-169
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 9 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 9 and A/T control relay
connector A-19X terminal 3.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
.
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
.
ACX02479
CONNECTOR: B-38
AF
AC001967
HARNESS
CONNECTOR: B-38
AE
AC004286 AC
A/T CONTROL
RELAY
BATTERY
CONNECTOR: A-19X
AC004197
PCM
AF
CONNECTOR: C-42
AUTOMATIC TRANSAXLE DIAGNOSIS
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AUTOMATIC TRANSAXLE
23A-170
STEP 14. Check harness for open circuit, or short circuit to
ground between solenoid valve assembly connector B-38
terminal 3 and PCM connector C-42 terminal 120.
Q: Is the harness wire in good condition?
YES : Replace the PCM.
NO : Repair it.
DTC 33: Second Solenoid Valve System
Solenoid Valve System Circuit
Refer to
.
CIRCUIT OPERATION
Refer to
.
DTC SET CONDITIONS
If the resistance value for a solenoid valve circuit is
greater than 3.5
Ω
for 4 seconds at 100
°
C (212
°
F) or
less than 2.6
Ω
for 4 seconds at 100
°
C (212
°
F), it is
judged that there is a short circuit or an open circuit
in the solenoid valve and the diagnostic trouble code
number "33" is displayed. The transmission is locked
into 3rd gear as a fail-safe measure.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set:)
•
Malfunction of second solenoid valve
•
Damaged harness, connector
•
Malfunction of the PCM
DIAGNOSIS
Required Special Tool:
MB991502: Scan Tool (MUT-II)
ACX02479
CONNECTOR: B-38
AF
AC004197
PCM
AF
CONNECTOR: C-42
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