Mitsubishi Outlander GS45X. Manual — part 1631

DIAGNOSIS

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CVT

23A-81

STEP 5. Check for open circuit in the wiring harness
between the selector lever assembly connector and the
body ground
Between C-24 selector lever assembly connector (terminal
No.6) and body ground
Q: Is the check result normal?

YES : Go to Step 6.
NO : Repair the wiring harness.

STEP 6. Symptom recheck after erasing diagnosis code
Q: Is the check result normal?

YES : Intermittent malfunction
NO : Replace TCM.

DTC P0840: Malfunction of Secondary Pressure Sensor

SECONDARY
PRESSURE
SENSOR

AC901224

CVT
ASSEMBLY

TRANSAXLE
CONTROL MODULE

Secondary pressure sensor system circuit

AC709490

Connector: A-12

AB

AC709493

AD

Connector: B-125

B-125 (B)

DIAGNOSIS

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CVT

23A-82

.

DIAGNOSTIC FUNCTION

TCM conducts fault detection by monitoring the out-
put voltage of the secondary pressure sensor.

.

DESCRIPTIONS OF MONITOR METHODS

• The status with the fluid temperature of −20°C

(

−4°F) or more and with the secondary pressure

sensor voltage of 4.69 volts or more continues for
5 seconds.

• The status with the fluid temperature of −20°C

(

−4°F) or more and with the secondary pressure

sensor voltage of 0.09 volts or less continues 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)

• P0746: Abnormality in hydraulic control system

function

• P0841: Abnormality in line pressure sensor func-

tion

• P0868: Secondary pressure drop

Sensor (The sensor below is determined to be

normal)

• Not applicable

.

AC703253

Connector: C-37

Brake pedal

AC

DIAGNOSIS

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CVT

23A-83

LOGIC FLOW CHARTS (Monitor Sequence)

.

AC609343

START

Yes

Yes

No

Continuous failure for 5 sec

No

No

Yes

Good

Malfunction

END

Yes

Yes

Yes

No

No

Secondary pressure
sensor voltage 4.69 mA

Secondary pressure
sensor voltage 0.09 V

No

Continuous failure for 5 sec

Transmission fluid > -20˚C (-4˚F)

Transmission fluid > -20˚C (-4˚F)

V

AC

DIAGNOSIS

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CVT

23A-84

DTC SET CONDITIONS

JUDGMENT CRITERIA

• Secondary pressure sensor voltage [transmission

fluid temperature: more than

−20°C (−4°F)]: 4.69

volts or more. (5 seconds)

• Secondary pressure sensor voltage [transmission

fluid temperature: more than

−20°C (−4°F)]: 0.09

volt or less. (5 seconds)

.

OBD-II DRIVE CYCLE PATTERN

All the conditions below continue for 6 seconds.

• Transmission range switch: D

• Vehicle speed: 10 km/h (6.2 mph) or more

• Throttle position: 1/8 or more

• Engine speed: 450 r/min or more

• Transmission fluid temperature: 20°C (68°F) or

more.

• Transmission fluid temperature: 99°C (210°F) or

more.

.

PROBABLE CAUSES

• Malfunction of valve body assembly (Faulty sec-

ondary pressure sensor)

• Damaged wiring harness and connectors

• Malfunction of TCM

DIAGNOSTIC PROCEDURE

STEP 1. M.U.T.-III data list

• Item 4: Secondary pressure sensor signal (Refer to Data

List Reference Table

P.23A-127

.)

Q: Is the check result normal?

YES : Intermittent malfunction
NO : Go to Step 2.

STEP 2. Check the following connector:

• B-125 CVT assembly connector

• C-37 TCM connector

• A-12 Intermediate connector

Check the terminals for a contact status problem and internal
short circuit.
Q: Is the check result normal?

YES : Go to Step 3.
NO : Repair the defective connector.

STEP 3. Check for open circuit and short to ground in the
wiring harness between the TCM connector and the CVT
assembly connector.

• Between C-37 TCM connector (terminal No.39) and B-125

CVT assembly connector (terminal No.7)

• Between C-37 TCM connector (terminal No.48) and B-125

CVT assembly connector (terminal No.19)

• Between C-37 TCM connector (terminal No.49) and B-125

CVT assembly connector (terminal No.5)

Q: Is the check result normal?

YES : Go to Step 4.
NO : Repair the wiring harness.

STEP 4. Symptom recheck after replacing the valve body
assembly
Q: Is the check result normal?

YES : The procedure is complete.
NO : Replace TCM.