Content .. 565 566 567 568 ..

Mitsubishi Montero (2002-2004). Manual - part 567

DIAGNOSTIC TROUBLE CODE CHART

TSB Revision

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

13Ab-25

P0715

Input/turbine speed
sensor circuit

• A/T DTC No. 22 (Input shaft speed sensor

system: Short circuit/Open circuit)

P.23Ab-31

P0720

Output speed sensor
circuit

• A/T DTC No. 23 (Output shaft speed sensor

system: Short circuit/Open circuit)

P.23Ab-31

P0731

Gear 1 incorrect

• A/T DTC No. 41 (1st gear incorrect ratio)

P.23Ab-31

P0732

Gear 2 incorrect

• A/T DTC No. 42 (2nd gear incorrect ratio)

P.23Ab-31

P0733

Gear 3 incorrect

• A/T DTC No. 43 (3rd gear incorrect ratio)

P.23Ab-31

P0734

Gear 4 incorrect

• A/T DTC No. 44 (4th gear incorrect ratio)

P.23Ab-31

P0735

Gear 5 incorrect

• A/T DTC No. 45 (5th gear incorrect ratio)

P.23Ab-31

P0736

Gear R incorrect

• A/T DTC No. 46 (Reverse gear incorrect

ratio)

P.23Ab-31

P0741

Torque converter clutch
circuit performance or
stuck off

• A/T DTC No. 52 (Torque converter clutch

solenoid system: Defective system)

P.23Ab-31

P0742

Torque converter clutch
circuit stuck on

• A/T DTC No. 53 (Torque converter clutch

solenoid system: Lock-up stuck on)

P.23Ab-31

P0743

Torque converter clutch
circuit electrical

• A/T DTC No. 36 (Torque converter clutch

solenoid system: Short circuit/Open circuit)

P.23Ab-31

P0753

Shift solenoid "A"
electrical

• A/T DTC No. 31 (Low and reverse solenoid

valve system: Short circuit/Open circuit)

P.23Ab-31

P0758

Shift solenoid "B"
electrical

• A/T DTC No. 32 (Underdrive solenoid valve

system: Short circuit/Open circuit)

P.23Ab-31

P0763

Shift solenoid "C"
electrical

• A/T DTC No. 33 (Second solenoid valve

system: Short circuit/Open circuit)

P.23Ab-31

P0768

Shift solenoid "D"
electrical

• A/T DTC No. 34 (Overdrive solenoid valve

system: Short circuit/Open circuit)

P.23Ab-31

P0773

Shift solenoid "E"
electrical

• A/T DTC No. 35 (Reduction solenoid valve

system: Short circuit/Open circuit)

P.23Ab-31

P1400

Manifold differential pressure sensor circuit malfunction

P.13Ac-557

P1601*

Communication malfunctio

n (between PCM and throttle actuator control

module

)

P.13Ac-566

P1603*

Battery backup circuit malfunction

P.13Ac-567

P1751

A/T control relay
malfunction

• A/T DTC No. 54 (A/T control relay system:

Short circuit to ground /open circuit)

P.23Ab-31

P2100*

Throttle actuator control motor circuit (open )

P.13Ac-571

P2101*

Throttle actuator control motor magneto malfunction

P.13Ac-577

P2102*

Throttle actuator control motor circuit(shorted low)

P.13Ac-582

P2103*

Throttle actuator control motor circuit (shorted high)

P.13Ac-587

P2108*

Throttle actuator control processor malfunction

P.13Ac-593

P2121*

Accelerator pedal position sensor (main) circuit range/performance
problem

P.13Ac-594

P2122*

Accelerator pedal position sensor (main) circuit low input

P.13Ac-600

DTC NO.

DIAGNOSTIC ITEM

REFERENCE
PAGE

SYMPTOM CHART

TSB Revision

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

13Ab-26

NOTE: Do not replace the powertrain control module (PCM) until a through terminal check reveals there are
no short/open circuits.
NOTE: Check that the PCM ground circuit is normal before checking for the cause of the problem.
NOTE: After the PCM detects a malfunction, a diagnostic trouble code is recorded the next time the engine is
started and the same malfunction is re-detected. However, for items marked with a "*", the diagnostic trouble
code is recorded on the first detection of the malfunction.
NOTE: Sensor 1 indicates the sensor mounted at a position closest to the engine, and sensor 2 indicates the
sensor mounted at the position second closest to the engine.
NOTE: Bank 1 indicates the right bank side cylinder, and Bank 2 indicates the left bank side cylinder.

SYMPTOM CHART

M1131151500373

NOTE: Check that the PCM ground circuit is normal
before checking for the cause of the problem.

P2123*

Accelerator pedal position sensor (main) circuit high input

P.13Ac-607

P2126*

Accelerator pedal position sensor (sub) circuit range/performance
problem

P.13Ac-613

P2127*

Accelerator pedal position sensor (sub) circuit low input

P.13Ac-619

P2128*

Accelerator pedal position sensor (sub) circuit high input

P.13Ac-628

P2135*

Throttle position sensor (main and sub)range/performance ploblem

P.13Ac-634

P2138*

Accelerator pedal position sensor (main and sub)range/performance
ploblem

P.13Ac-638

DTC NO.

DIAGNOSTIC ITEM

REFERENCE
PAGE

TROUBLE SYMPTOMS

INSPECTION
PROCEDURE

REFERENCE
PAGE

Communication
with scan tool is
impossible

Communication with all systems is not possible

P.13Ad-2

Communication with PCM only is not possible

P.13Ad-5

Malfunction
Indicator Lamp
(SERVICE
ENGINE SOON
or Check
Engine Lamp)
and related
parts

The Malfunction Indicator Lamp (SERVICE ENGINE
SOON or Check Engine Lamp) does not illuminate
right after the ignition switch is turned to the "ON"
position

P.13Ad-8

The Malfunction Indicator Lamp (SERVICE ENGINE
SOON or Check Engine Lamp) remains illuminated
and never goes out

P.13Ad-14

Starting

Cranks, won't start

P.13Ad-18

Starts up and dies

P.13Ad-23

Hard starting

P.13Ad-30

Idling stability
(improper
idling)

Unstable idle (rough idle, hunting)

P.13Ad-35

Idle speed is high (improper idle speed)

P.13Ad-39

Idle speed is low (improper idle speed)

P.13Ad-40

SYMPTOM CHART

TSB Revision

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

13Ab-27

PROBLEM SYMPTOMS TABLE (FOR YOUR INFORMATION)

Idling stability
(engine stalls)

When the engine is cold, it stalls at idle (die out)

P.13Ad-41

When the engine is hot, it stalls at idle (die out)

P.13Ad-43

The engine stalls when accelerating (pass out)

P.13Ad-47

The engine stalls when decelerating

P.13Ad-48

Driving

Hesitation, sag or stumble

Acceleration shock

Deceleration shock

Poor acceleration

Surge

Knocking

Dieseling (Run-on)

Too high CO and HC concentration when idling

P.13Ad-61

IM240 test
failure

Transient, mass emission tailpipe test failure

P.13Ad-63

Purge flow test of the evaporative emission canister
failure

P.13Ad-69

Pressure test of the evaporative system failure

P.13Ad-69

Improper idle speed when the A/C is operating (A/C switch 2 signal)

P.13Ad-70

A/C condenser fan is inoperative

P.13Ad-73

Power supply system and ignition switch-IG system

P.13Ad-75

Fuel pump system

P.13Ad-85

Ignition switch

− ST system and transmission range switch system

P.13Ad-95

Ignition circuit system

P.13Ad-99

A/C system

P.13Ad-107

Accelerator pedal position switch system

P.13Ad-110

TROUBLE SYMPTOMS

INSPECTION
PROCEDURE

REFERENCE
PAGE

ITEMS

SYMPTOM

Starting

Won't start

The starter cranks the engine, but there is no combustion within the
cylinders, and the engine won't start.

Starts up and
dies

The engine starts, but then engine soon stalls.

Hard starting

Engine starts after cranking a while.

SYMPTOM CHART

TSB Revision

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

13Ab-28

Idling stability

Hunting

Engine speed doesn't remain constant; changes at idle.

Rough idle

Usually, a judgement can be based upon the movement of the
tachometer pointer, and the vibration transmitted to the steering wheel,
shift lever, body, etc.

Incorrect idle
speed

The engine doesn't idle at the usual correct speed.

Engine stall (die
out)

The engine stalls when the foot is taken from the accelerator pedal,
regardless of whether the vehicle is moving or not.

Engine stall
(pass out)

The engine stalls when the accelerator pedal is depressed or while it is
being used.

Driving

Hesitation Sag

"Hesitation" is the delay in
response of the vehicle speed
(engine speed). This occurs when
the accelerator is depressed in
order to accelerate from the speed
at which the vehicle is now
traveling, or a temporary drop in
vehicle speed (engine speed)
during such acceleration.
Serious hesitation is called "sag".

Poor
acceleration

Poor acceleration is inability to obtain an acceleration corresponding to
the degree of throttle opening, even though acceleration is smooth. The
inability to reach maximum speed.

Stumble

Engine speed increase is delayed
when the accelerator pedal is
initially depressed for acceleration.

Shock

The feeling of a comparatively large impact or vibration when the
engine is accelerated or decelerated.

Surge

This is slight acceleration and deceleration feel usually felt during
steady, light throttle cruise. Most notable under light loads.

Knocking

A sharp sound during driving usually work aloud. It sounds like a
hammer striking the cylinder walls. It adversely affects driving.

Stopping

Run on
("Dieseling")

The condition in which the engine continues to run after the ignition
switch is turned to the "LOCK" (OFF) position. Also called "dieseling".

ITEMS

SYMPTOM

AKX01361

VEHICLE
SPEED

TIME

NORMAL

HESITATION

SAG

INITIAL
ACCELE-
RATOR
PEDAL
DEPRE-
SSION

AKX01361AB

AKX01362

VEHICLE
SPEED

TIME

NORMAL

STUMBLE

INITIAL
ACCEL-
ERATOR
PEDAL
DEP-
RESSION

IDLING

Content .. 565 566 567 568 ..