13

Primary Speed
Secondary Speed
Engine RPM
Real Change Gear Ratio

20
21
15
31

Primary Pressure
Secondary Pressure
Accelerator Pedal Position
Target Secondary Pressure

For instructions on attaching a Drive Recording to a Techline case, go to:
MDL > service > systems > Techline > Techline system

D

Click on the “HOW-TO” Instructions button, and follow instructions under “DRIVE
RECORDINGS” and “3. Attach A Drive Recording To A Techline Case.”

6. Attach a short video beginning at the transaxle showing belt element where contact is made
with the pulley and move to the VIN plate on the driver side B Pillar.

To view sample video go to Mitsubishi Academy.com, CVT Belt Inspection video.
a. Take clear photos to capture the following:
• Belt element where it makes contact with pulley
• The pulley itself
• Transmission oil pan
b. Upload the video/photos to: MDL > service > systems > Techline > Techline system
7.

Contact Techline for assistance.

8.

Depending on diagnosis, and instruction from Techline, order replacement parts as needed.
Refer to Parts Information in this TSB for the correct part number.

9.

If applicable, repair or replace the CVT-8 transaxle and/or the valve body, then perform the
CVT ECU coding procedures found in TSB-15-23-001 "F1CJC/W1CJC CVT ECU Coding
Procedure" or applicable Service Manual for F1CJD/W1CJD CVT ECU Coding Procedure.
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D

CVT BELT AND PULLEY INSPECTION
For DTCs P0776 and P084A, follow the Flow Chart in the applicable Service Manual, then follow
the steps below to complete CVT belt and pulley inspection.

1. Attach a short video beginning at the transaxle showing belt element where contact is
made with the pulley and move to the VIN plate on the driver side B Pillar.
To view sample video go to Mitsubishi Academy.com, CVT Belt Inspection video.
a. Take clear photos to capture the following:
• Belt element where it makes contact with pulley
• The pulley itself
• Transmission oil pan
b. Upload the video/photos to: MDL > service > systems > Techline > Techline system
2.
3.
4.

Contact Techline for assistance.
Depending on diagnosis, and instruction from Techline, order replacement parts as
needed. Refer to Parts Information in this TSB for the correct part number.
If applicable, repair or replace the CVT-8 transaxle and/or the valve body, then perform
the CVT ECU coding procedures found in TSB-15-23-001 "F1CJC/W1CJC CVT ECU Coding
Procedure" or applicable Service Manual for F1CJD/W1CJD CVT ECU Coding Procedure.

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Attach borescope video/photos to the Techline case. Then contact Techline for assistance.
Return to step 6 above.

CVT

DIAGNOSIS

DTC P0776: Abnormality in Secondary Pressure Solenoid Valve Function

DIAGNOSTIC FUNCTION

TCM conducts fault detection by measuring the difference between the target value and the actual
value for the secondary pressure.

DESCRIPTIONS OF MONITOR METHODS
The following three conditions are met for 10 seconds.
• The engine is running.
• Selector lever position: Other than P, N.
• Fluid temperature: More than -20°C (-4°F).
• Difference between the target secondary pressure and actual secondary pressure is 1.2 MPa
(174 psi) or more.

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MONITOR EXECUTION

• Voltage of battery: 10 volts or more.

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

(5378/TSL2310026)

CVT

DIAGNOSIS

LOGIC FLOW CHARTS (Monitor Sequence-Output Functional High)
START

No

All secondary parameters
are in the enable condition.
Yes

Actual secondary pressure Target secondary pressure
> 1.2 MPa (174 psi)

No

Yes
No

Continuous failure
for 15 sec
Yes
Malfunction

Good

END
BCC07002AA

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CVT

DIAGNOSIS

LOGIC FLOW CHARTS (Monitor Sequence-Output Functional Low)
START

All secondary
parameters for steady state are
in the enable condition.

No

Yes
No

All secondary
parameters for transient state are
in the enable condition.

Yes
Target secondary pressure Actual secondary pressure
> 1.2 MPa (174 psi)

No

Yes
Target secondary pressure Actual secondary pressure
> 1.2 MPa (174 psi)

No

Continuous failure
for 10 sec

No

Yes

Yes

No

Continuous failure
for 10 sec
Yes

Malfunction
(Steady state)

Malfunction
(Transient state)

Good

END
BCD04219AA

DTC SET CONDITIONS

• Engine speed: 450 r/min or more.
• Target secondary pressure: 0 MPa (0 psi) or
more.
• Time since following conditions are approved:
More than 1.52 seconds [2 times (Interval: 30
second)].
a. Target secondary pressure - Actual secondary pressure: 0.25 MPa (36 psi) or more.

Check Conditions
• Voltage of battery: 10 volts or more.
• Transmission range switch position: D or R.
Check Conditions
• Voltage of battery: 10 volts or more.
• Transmission range switch position: D or R.

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CVT

DIAGNOSIS

b. Actual secondary pressure: Less than minimum line pressure.
c. Accelerator pedal position change rate:
6.25% / 1.52 seconds or less.
d. Vehicle speed change rate: 15 km/h (9 mph) /
1.52 seconds or less.
Check Conditions
• Voltage of battery: 10 volts or more.
• Transmission range switch position: D or R.
• Engine speed: 450 r/min or more.
• Target secondary pressure: 0 MPa (0 psi) or
more.
• Time since following conditions are approved:
More than 1 seconds.
a. MIN [(Target secondary pressure - Actual secondary pressure), (Minimum line pressure Actual secondary pressure)]: 2 MPa (290 psi)
or more.

Judgment Criteria
• Target secondary pressure - Actual secondary
pressure: More than 1.2 MPa (174 psi) (10 seconds).
Judgment Criteria
• Target secondary pressure - Actual secondary
pressure: More than 1.2 MPa (174 psi) (10 seconds).

OBD-II DRIVE CYCLE PATTERN

The vehicle is driven for at least 10 seconds with the
accelerator opening angle at 20% or more.

PROBABLE CAUSES

Judgment Criteria
• Actual secondary pressure - Target secondary
pressure: More than 1.2 MPa (174 psi) (15 seconds).

• Malfunction of valve body assembly (Faulty secondary pressure solenoid valve)
• Malfunction of the CVT assembly
• Malfunction of the TCM

DIAGNOSIS
STEP 1. Scan tool (M.U.T.-IIISE) DTC.
Q: Is diagnostic trouble code No. P0966 or P0967 set?
YES : Carry out the appropriate troubleshooting.
NO : Go to Step 2.
STEP 2. Measure the output wave pattern of the secondary
pressure solenoid valve at TCM connector (SCLS
terminal).
(1) Connect the CVT assembly connector.
(2) Selector lever position: L range or sport mode (1st gear).
(3) Drive at a constant speed of approx. 20 km/h (13 mph).
(4) Connect an oscilloscope, and measure the voltage between
TCM connector SCLS terminal and body ground.
OK: A wave pattern such as the one shown on
(Check Procedure Using an Oscilloscope) should
be output. There should be no noise in the output
wave pattern.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Refer to diagnostic trouble code No.P0966:
Malfunction of Secondary Pressure Solenoid Valve
(low input), or diagnostic trouble code No.P0967:
Malfunction of Secondary Pressure Solenoid Valve
(high input).

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CVT

DIAGNOSIS

STEP 3. CVT belt inspection.
Use the borescope (MQ600069) to check the appearance (Slip
marks, the presence or absence of damage) of the CVT belt.
(Refer to On-vehicle Service – CVT Belt Inspection)
Q: Is the CVT belt normal?
YES : Replace the valve body assembly. Then go to Step 4.
NO : Replace the belt & pulley and valve body assembly.
STEP 4. Check whether the DTC is stored again.
Erase the DTC.
Then, drive the vehicle for a while and check again.
Q: Is the diagnostic trouble code set?
YES : Replace the TCM.
NO : This diagnosis is complete.

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CVT

DIAGNOSIS

DTC P084A: Abnormality in Primary Pressure Sensor Function

DIAGNOSTIC FUNCTION

The TCM determines that the system is defective
when the primary pressure sensor output voltage is
outside the predetermined value range.

DESCRIPTIONS OF MONITOR METHODS

All the conditions listed below remain for 5 seconds.
• The pulley ratio is 0.5 or more, 1.0 or less.
• The primary pulley speed is 300 r/min or more.
• The secondary pulley speed is 250 r/min or more.
• Target shifting speed is 0.1/sec or less.
• The primary pressure is outside the predetermined pressure range.

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MONITOR EXECUTION

• Voltage of battery: 10 volts or more.

MONITOR EXECUTION CONDITIONS
(OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
• P0966, P0967: Malfunction of secondary pressure solenoid valve
• P0970, P0971: Malfunction of primary pressure
solenoid valve
Sensor (The sensor below is determined to be
normal)
• Not applicable

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CVT

DIAGNOSIS

LOGIC FLOW CHARTS (Monitor Sequence)
START

No

All secondary parameters
are in the enable condition.
Yes

No

Check of "Actual primary fluid pressure" and
"Actual secondary fluid pressure" is error*

Yes
No

Continuous failure for 5 sec
Yes
Malfunction

Good

END

NOTE: *:
6 (3.7)

Actual primary
pressure
MPa (psi)

5 (3.1)

Error

4 (2.5)
3 (1.9)

Good

2 (1.2)
1 (0.6)
0 (0)

Error
1 (0.6)

2 (1.2)

3 (1.9)

4 (2.5)

5 (3.1)

6 (3.7)

Actual secondary pressure MPa (psi)
ACD04282

DTC SET CONDITIONS
Check Conditions
• Voltage of battery: 10 volts or more.
• Primary pulley speed: 300 r/min or more.
• Secondary pulley speed: 250 r/min or more.
• Pulley ratio: More than 0.5, less than 1.0.

3/1/2024

Judgment Criteria
• Check of "Actual primary pressure" and "Actual
secondary pressure" is error. (5 seconds).

OBD-II DRIVE CYCLE PATTERN

Ignition switch: ON (start the engine and keep it for