Mitsubishi Outlander XL. Manual - part 488

TROUBLESHOOTING HINTS (THE MOST LIKELY
CAUSES FOR THIS CODE TO BE SET ARE:)

｠

Malfunction  of  the  lock-up  and  low-reverse  brake
linear solenoid valve system circuit

｠

Damaged harness or connector

｠

Malfunction of the TCM

｠

Malfunction  of  the  lock-up  and  low-reverse  brake
linear solenoid valve (valve body assembly)

 

DIAGNOSIS

STEP 1. Check the TCM terminal voltage.
[C-37 TCM connector (vehicle side, connected)]
Measure  the  voltage  between  the  terminal  No.  52  and  body
ground.

｠

Lock-up released: 0 V

｠

Lock-up engaged: 300 Hz

Q:Is the check result normal?

YES:

 Go to Step 5.

NO:

 Go to Step 2.

STEP 2. Check between the TCM connector and A/T control
solenoid valve assembly connector.
Check for continuity between C-37 TCM connector and B-111
A/T control solenoid valve assembly connector.

｠

Between  C-37  terminal  No.  52  and  B-111  terminal  No.  4:
Continuity exists.

When the continuity check result is OK, check that the wiring
harness is not shorted to the body and other wiring harness.

Q:Is the check result normal?

YES:

 Go to Step 3.

NO:

 Repair or replace the failure section.

STEP 3. Check the lock-up and low-reverse brake linear
solenoid.
Refer to P.23A-160.

Q:Is the check result normal?

YES:

 Go to Step 6.

NO:

 Go to Step 4.

STEP 4. Check between the A/T control solenoid valve
assembly connector and the lock-up and low-reverse brake
linear solenoid valve connector.
Check  for  continuity  between  the  A/T  control  solenoid  valve
assembly  connector  and  the  lock-up  and  low-reverse  brake
linear solenoid valve connector terminals.

｠

Between  C-111  terminal  No.  4  and  the  lock-up  and  low-
reverse brake linear solenoid valve: Continuity exists.

Q:Is the check result satisfactory?

YES:

 Replace the valve body assembly.

NO:

 Repair or replace the failure section.

AUTOMATIC TRANSAXLE MECHANICAL

23A-67

AUTOMATIC TRANSAXLE DIAGNOSIS

STEP 5. Check the TCM and A/T control solenoid valve
assembly connector pin terminals and the connection
status.

Q:Is the check result normal?

YES:

 Go to Step 7.

NO:

 Repair or replace the failure section.

STEP 6. Check the TCM and A/T control solenoid valve
assembly connector pin terminals and the connection
status.

Q:Is the check result normal?

YES:

 Replace the TCM.

NO:

 Repair or replace the failure section.

STEP 7. Erase the DTC code, and drive the vehicle for a
while.
Check that the normal code is displayed.

Q:Is the check result normal?

YES:

 The procedure is complete.

NO:

 Return to START.

DTC P0748: Line Pressure Linear Solenoid Valve System

M12301000410USA0000010000

SOLENOID VALVE SYSTEM CIRCUIT
Refer to P.23A-64.

DESCRIPTIONS OF MONITOR METHODS

｠

With  the  ignition  switch  ON,  an  abnormal  value
equivalent to open or short circuit is detected in the
solenoid control current for 5 seconds.

MONITOR EXECUTION

｠

Continuous

MONITOR EXECUTION CONDITIONS (OTHER
MONITOR AND SENSOR)

Other Monitor (There is no temporary DTC stored in
memory for the item monitored below)

｠

Not applicable

Sensor (The sensor below is determined to be
normal)

｠

Not applicable

23A-68

AUTOMATIC TRANSAXLE MECHANICAL

AUTOMATIC TRANSAXLE DIAGNOSIS

LOGIC FLOW CHARTS (Monitor Sequence)

ZC604076

Good

Malfunction

END

START

Continuous failure  
       for 5 secs.

No

No

Good

No

Yes

Yes

Yes

No

Yes

Short to ground

Open judgement

Ignition switch :ON

(Battery positive voltage 

≧ 

2V)

0000

DTC SET CONDITIONS

Check Conditions <Circuit continuity ground>

｠

Voltage of battery: 2 volts or more.

Judgement Criteria <Circuit continuity ground>

｠

Ground short judgement: abnormal. (5 seconds)

Check Conditions <Circuit continuity open>

｠

Voltage of battery: 2 volts or more.

｠

Ground short judgement: normal.

Judgement Criteria <Circuit continuity open>

｠

Open short judgement: abnormal. (5 seconds)

OBD-II DRIVE CYCLE PATTERN
Start the engine, and keep the vehicle stopped in "P"
range for 5 seconds.

TROUBLESHOOTING HINTS (THE MOST LIKELY
CAUSES FOR THIS CODE TO BE SET ARE:)

｠

Malfunction  of  the  line  pressure  linear  solenoid
valve system circuit

｠

Damaged harness or connector

｠

Malfunction of the TCM

｠

Malfunction  of  the  line  pressure  linear  solenoid
valve (valve body assembly)

 

AUTOMATIC TRANSAXLE MECHANICAL

23A-69

AUTOMATIC TRANSAXLE DIAGNOSIS

DIAGNOSIS

STEP 1. Check the TCM terminal voltage.
[C-37 TCM connector (vehicle side, connected)]
Measure  the  voltage  between  the  terminal  No.  40  and  body
ground.

｠

While driving: 300 Hz

｠

Other than above: 0 V

Q:Is the check result normal?

YES:

 Go to Step 5.

NO:

 Go to Step 2.

STEP 2. Check between the TCM connector and A/T control
solenoid valve assembly connector.
Check for continuity between C-37 TCM connector and B-111
A/T control solenoid valve assembly connector.

｠

Between  C-37  terminal  No.  40  and  B-111  terminal  No.  9:
Continuity exists.

When the continuity check result is OK, check that the wiring
harness is not shorted to the body and other wiring harness.

Q:Is the check result normal?

YES:

 Go to Step 3.

NO:

 Repair or replace the failure section.

STEP 3. Check the line pressure linear solenoid.
Refer to P.23A-160.

Q:Is the check result normal?

YES:

 Go to Step 6.

NO:

 Go to Step 4.

STEP 4. Check between the A/T control solenoid valve
assembly connector and the line pressure linear solenoid
valve connector.
Check  for  continuity  between  the  A/T  control  solenoid  valve
assembly  connector  terminals  and  the  line  pressure  linear
solenoid valve connector terminals.

｠

Between  C-111  terminal  No.  9  and  line  pressure  linear
solenoid valve: Continuity exists.

Q:Is the check result satisfactory?

YES:

 Replace the valve body assembly.

NO:

 Repair or replace the failure section.

STEP 5. Check the TCM and A/T control solenoid valve
assembly connector pin terminals and the connection
status.

Q:Is the check result normal?

YES:

 Go to Step 7.

NO:

 Repair or replace the failure section.

23A-70

AUTOMATIC TRANSAXLE MECHANICAL

AUTOMATIC TRANSAXLE DIAGNOSIS