Mitsubishi Outlander GS45X. Manual — part 1633

DIAGNOSIS

TSB Revision

CVT

23A-89

DTC P0882: Malfunction of power supply system (Low)

DTC P0883: Malfunction of power supply system (high)

.

AC901225

RELAY BOX

CVT
CONTROL
RELAY

POWER SOURCE

FUSIBLE
LINK

36

TRANSAXLE
CONTROL MODULE

ENGINE
COMPARTMENT

TCM POWER SUPPLY CIRCUIT

AC709650

Connector: A-18X

AB

AC703253

Connector: C-38

Brake pedal

AB

DIAGNOSIS

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CVT

23A-90

DIAGNOSTIC FUNCTION

TCM monitors if power supply system is normal or
not and judges the trouble.

.

JUDGMENT CRITERIA

• <P0882> : When the engine speed is 450 r/min

or more and secondary pressure is above 0.3
MPa (44 psi), the power supply voltage is 9.0
volts or less (for 5 seconds)

• <P0883>: When the engine speed is 450 r/min or

more, the secondary pressure is above 0.3 MPa
(44 psi) and the vehicle speed is 1 km/h (0.6
mph) or more, the power supply voltage is 16.0
volts or more (for 5 seconds)

.

PROBABLE CAUSES

• Damaged wiring harness and connectors

• Malfunction of TCM

DIAGNOSTIC PROCEDURE

STEP 1. Check the following connector:

• A-18X CVT control relay connector

• C-38 TCM connector

Check each terminal for imperfect contact.
Q: Is the check result normal?

YES : Go to Step 2.
NO : Repair the defective connector.

STEP 2. Check for short circuit in the wiring harness
between the fusible link No.36 and the TCM connector.

• Between fusible link No.36 and C-38 TCM connector (termi-

nal No.12)

• Between fusible link No.36 and C-38 TCM connector (termi-

nal No.25)

Q: Is the check result normal?

YES : Go to Step 3.
NO : Repair the wiring harness.

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

• Between C-38 TCM (terminal No.13) and ground

• Between C-38 TCM (terminal No.26) and ground

Q: Is the check result normal?

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

STEP 4. Retest the system.
Recheck the trouble symptom.
Q: Does the malfunction take place again?

YES : Replace TCM.
NO : Intermittent malfunction

DIAGNOSIS

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CVT

23A-91

DTC P1637: Malfunction of Memory Backup

.

DIAGNOSTIC FUNCTION

TCM checks the consistency between EEPROM and
the backup memory.

.

DESCRIPTIONS OF MONITOR METHODS

• When the ignition switch is turned to the "ON"

position, TCM determines that the writing to the
EEPROM area had failed last time the ignition
switch was turned to the "LOCK" (OFF) position.

.

MONITOR EXECUTION

• Continuous

.

RELAY BOX

CVT
CONTROL
RELAY

POWER SUPPLY

BATTERY
BACK-UP

FUSIBLE
LINK

36

TRANSAXLE
CONTROL MODULE

ENGINE
COMPARTMENT

Memory backup system circuit

AC709650

Connector: A-18X

AB

AC703253

Connectors: C-37, 38

C-38

C-37

Brake pedal

AD

DIAGNOSIS

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CVT

23A-92

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

.

LOGIC FLOW CHARTS (Monitor Sequence)

.

DTC SET CONDITIONS

JUDGMENT CRITERIA

• Calculated checksum is not same as memorized

checksum.

.

OBD-II DRIVE CYCLE PATTERN

Ignition switch : ON (start the engine and keep it for
10 seconds or more)

.

PROBABLE CAUSES

• Damaged wiring harness and connectors

• Malfunction of TCM (Faulty EEPROM)

DIAGNOSTIC PROCEDURE

STEP 1. Check if diagnostic trouble code P1637 is erased
by turning the ignition switch from the "LOCK" (OFF)
position to the "ON" position.
Q: Is the check result normal?

YES : This diagnostic trouble code will be set by

disconnecting the battery. If the diagnostic trouble
code is not erased by turning the ignition switch to the
"ON" position, it is judged to be normal.

NO : Go to Step 2.

AC710015

START

Yes

No

Good

Malfunction

END

Calculated checksum memorized checksum