engine MITSUBISHI MONTERO 1991 Owners Manual
Page 344 of 1333
Airflow Sensor In air cleaner housing
(Includes air temp. and baro.
sensor).
Barometric Pressure Sensor Inside airflow sensor
assembly.
Coolant Temperature Sensor
View of 3.0L MPI Engine On front of intake manifold.
Page 346 of 1333
Idle Speed Control Sensor On throttle body assembly.
Intake Air Temperature Sensor Inside airflow sensor
assembly.
Oil Pressure Sending Unit On right side of engine, near
oil filter.
Temp. Gauge Sending Unit On thermostat housing.
Page 347 of 1333
Throttle Position Sensor (TPS) On side of throttle body.
Vehicle Speed Sensor Built into speedometer.
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SOLENOIDS & SOLENOID VALVES \
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Component Component Location \
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Overdrive Solenoid (A/T) Left side of transmission.
Purge Control Solenoid In left front of engine
compartment.
Page 348 of 1333
Throttle Opener Control Sol. On firewall. \
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SWITCHES \
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Component Component Location \
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A/C Dual Pressure Switch On right front corner of
engine compartment, near right
headlight.
A/C Thermoswitch Above evaporator.
Page 350 of 1333
Inhibitor Switch (A/T) At base of shift lever.
Oil Pressure Switch On right side of engine, near
oil filter.
Power Steering Pressure Switch On power steering pump.
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MISCELLANEOUS \
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Component Component Location \
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A/C-Heater Blower Motor Resistor On blower motor housing.
Diagnostic/Test Connector:
Page 355 of 1333
manufacturer-recommended, maintenance. We encourage participating
service and repair shops (including franchisees and dealers) to adopt
(1) a Pledge of Assurance to their Customers and (2) the Motorist
Assurance Program Standards of Service. All participating service
providers have agreed to subscribe to this Pledge and to adhere to the
promulgated Standards of Service demonstrating to their customers that
they are serious about customer satisfaction.
These Standards of Service require that an inspection of the
vehicle's (problem) system be made and the results communicated to the\
customer according to industry standards. Given that the industry did
not have such standards, the Motorist Assurance Program successfully
promulgated industry inspection communication standards in 1994-95 for
the following systems: Exhaust, Brakes, ABS, Steering and Suspension,
Engine Maintenance and Performance, HVAC, and Electrical Systems.
Further, revisions to all of these inspection communication standards
are continually re-published.
In addition to these, standards for Drive Train and
Transmissions have recently been promulgated. Participating shops
utilize these Uniform Inspection & Communication Standards as part of
the inspection process and for communicating their findings to their
customers.
The Motorist Assurance Program continues to work
cooperatively and proactively with government agencies and consumer
groups toward solutions that both benefit the customer and are
mutually acceptable to both regulators and industry. We maintain the
belief that industry must retain control over how we conduct our
business, and we must be viewed as part of the solution and not part
of the problem. Meetings with state and other government officials
(and their representatives), concerned with auto repair and/or
consumer protection, are conducted. Feedback from these sessions is
brought back to the association, and the program adjusted as needed.
To assure auto repair customers recourse if they were not
satisfied with a repair transaction, the Motorist Assurance Program
offers mediation and arbitration through MAP/BBB-CARE and other non-
profit organizations. MAP conducted pilot programs in twelve states
before announcing the program nationally in October, 1998. During the
pilots, participating repair shops demonstrated their adherence to the
Pledge and Standards and agreed to follow the UICS in communicating
the results of their inspection to their customers. To put some
"teeth" in the program, an accreditation requirement for shops was
initiated. The requirements are stringent, and a self-policing method
has been incorporated which includes the "mystery shopping" of
outlets.
We welcome you to join us as we continue our outreach... with
your support, both the automotive repair industry and your customers
will reap the benefits. Please visit MAP at our Internet site www.
motorist.org or contact us at:
1444 I Street, NW Suite 700
Washington, DC 20005
Phone (202) 712-9042 Fax (202) 216-9646
January 1999
MAP UNIFORM INSPECTION GENERAL GUIDELINES
OVERVIEW OF SERVICE REQUIREMENTS & SUGGESTIONS
It is MAP policy that all exhaust, brake, steering,
suspension, wheel alignment, drive-line, engine performance and
maintenance, and heating, ventilation and air conditioning, and
electrical services be offered and performed under the standards and
procedures specified in these sections.
Page 370 of 1333
Wire lead conductors
exposed ................ B .. Require repair or replacement.
Wire lead corroded ...... A .. Require repair or replacement.
Wire lead open .......... A .. Require repair or replacement.
Wire lead shorted ....... A .. Require repair or replacement.
(1) - Refer to manufacturer's diagnostic trouble code procedure
and require repair or replacement of affected
component(s).
( 2) - Determine cause and correct prior to repair or replacement
of part.
( 3) - Determine source of contamination, such as engine
coolant, fuel, metal particles, or water. Require
repair or replacement.
( 4) - Inoperative includes intermittent operation or out of OEM
specification. Some components may be serviceable; check
for accepted cleaning procedure.
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CRUISE CONTROL BRAKE SWITCHES
See SWITCHES.
CRUISE CONTROL CABLES
See CRUISE CONTROL LINKAGES AND CABLES .
CRUISE CONTROL CLUTCH SWITCHES
See SWITCHES.
CRUISE CONTROL LINKAGES AND CABLES
CRUISE CONTROL LINKAGE AND CABLE INSPECTION \
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Condition Code Procedure
Attaching hardware
broken ................. A ... Require repair or replacement
of hardware.
Attaching hardware
missing ................ C .......... Require replacement of
hardware.
Attaching hardware not
functioning ............ A ... Require repair or replacement
of hardware.
Bent .................... A .. Require repair or replacement.
Binding ................. A .. Require repair or replacement.
Bracket bent, affecting
performance ............ A .. Require repair or replacement.
Bracket bent, not
affecting performance .. .. ........ No service suggested or
required.
Bracket broken, affecting
performance ............ A ............ Require replacement.
Bracket broken, not
affecting performance .. .. ........ No service suggested or
required.
Bracket corroded,
affecting performance .. A .. Require repair or replacement.
Bracket corroded, not
affecting performance .. 2 .. Suggest repair or replacement.
Page 407 of 1333
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B - E M IS SIO N A PPLIC ATIO N
1991 M it s u bis h i M onte ro
1990-91 ENGINE PERFORMANCE
Mitsubishi Emission Control Applications
Galant, Mirage, Montero, Pickup, Precis, Sigma,
Van/Wagon
EMISSION CONTROL DEVICE APPLICATIONS
EMISSION CONTROL DEVICE APPLICATIONS TABLE \
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1.5L PFI Mirage
PCV, EVAP, TWC, EGR (1), SPK, O2, CEC, CE, EVAP-CS, EVAP-VC,
EGR-CS (1), EGR-TS (1), SPK-CC
1.5L PFI Precis
PCV, EVAP, TWC, EGR, SPK, O2, CEC, CE, EVAP-CS, EVAP-VC,
EGR-CS (1), EGR-TVS (2), SPK-CC
1.6L PFI
PCV, EVAP, TWC, EGR, SPK, O2, CEC, CE, EVAP-CS, EVAP-VC,
EGR-CS (1), EGR-TS (1), EGR-TVS (2), SPK-CC
1.8L, 2.0L & 2.0L Turbo PFI
PCV, EVAP, TWC, EGR, SPK, CEC, CE, EVAP-CS, EVAP-PV (3),
EVAP-VC, EGR-CS (1), EGR-TS (1), EGS-TVS, SPK-CC
2.4L PFI
PCV, EVAP, TWC, EGR, SPK, O2, CEC, CE, EVAP-CS, EVAP-VC,
EGR-CS (1)(4), EGR-TS (1), EGR-TVS (5), SPK-CC
2.6L 2-Bbl.
PCV, TAC, EVAP, TWC, EGR, SPK, PAS, O2, CEC, EVAP-CBVV,
EVAP-PV, EVAP-TV, EVAP-VC, EGR-VRV, SPK-TVS, PAS-PAV,
PAS-PAVCS, DVA
3.0L V6 PFI Montero
PCV, EVAP, TWC, SPK, O2, CEC, CE, EVAP-CS, EVAP-VC, SPK-CC
3.0L V6 PFI Pickup & Sigma
PCV, EVAP, TWC, EGR (1), SPK, O2, CEC, CE, EVAP-VC, EVAP-CS,
EGR-CS (1), EGR-TS (1), EGR-TVS (6), SPK-CC
3.0L SOHC, 3.0L DOHC & 3.0L Turbo (PFI) Stealth
PCV, EVAP, TWC, EGR, SPK, O2, CEC, CE, EGR-CSOLV (1),
EGR-TS (1), EGR-TV (2), PG-CSOLV, PG-CV (7), SPK-CC
(1) - California models only.
(2) - Federal models only.
(3) - Eclipse 2.0L Turbo models only.
(4) - Except Van/Wagon models.
(5) - Van/Wagon only.
(6) - Sigma Federal only.
(7) - Turbo models only.
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ABBREVIATION DEFINITIONS
ABBREVIATIONS DEFINITIONS TABLE \
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Page 408 of 1333
Abbreviation Description
AIS ............................ Air Injection System
CBVV ..................... Carburetor Bowl Vent Valve
CE ............................... Check Engine Light
CEC ..................... Computerized Engine Control
EGR ....................... Exhaust Gas Recirculation
EGR-CS ......................... EGR Control Solenoid
EGR-TS ....................... EGR Temperature Sensor
EGR-TV .............................. EGR Thermovalve
EGR-TVS ................... EGR Thermal Vacuum Switch
EGR-VRV .................. EGR Vacuum Regulator Valve
EVAP ........................ Fuel Evaporation System
EVAP-CBVV ........... EVAP Carburetor Bowl Vent Valve
EVAP-CS ....................... EVAP Control Solenoid
EVAP-PV ............................ EVAP Purge Valve
EVAP-TV .......................... EVAP Thermal Valve
EVAP-VC ......................... EVAP Vapor Canister
FBC ............................. Feedback Carburetor
HAC ...................... High Altitude Compensation
HAC-VSV .................. HAC Vacuum Switching Valve
MCV ........................... Mixture Control Valve
O2 .................................... Oxygen Sensor
PAS ............................. Pulse Air Injection
PAS-PAV ......................... PAS Pulse Air Valve
PAS-PAVCS ............ PAS Air Valve Control Solenoid
PAV ................................. Pulse Air Valve
PAV-CSOLV ................ PAV Control Solenoid Valve
PCV .................. Positive Crankcase Ventilation
PFI ............................. Port Fuel Injection
PG-CSOLV ............... Purge Control Solenoid Valve
PG-CV .......................... Purge Control Valve
PG-TV ............................. Purge Thermovalve
SPK ................................... Spark Control
SPK-CC ...................... SPK Computer Controlled
SPK-TVS ................... SPK Thermal Vacuum Switch
TAC ........................ Thermostatic Air Cleaner
TWC .............................. Three-Way Catalyst
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Page 409 of 1333
EM IS SIO N C O NTR O L V IS U AL IN SPEC TIO N P R O CED URES
1991 M it s u bis h i M onte ro
1983-98 GENERAL INFORMATION
Emission Control Visual Inspection Procedures
All Models
* PLEASE READ THIS FIRST *
This article is provided for general information only. Not
all information applies to all makes and models. For more complete
information, see appropriate article(s) in the ENGINE PERFORMANCE
Section.
EMISSION CONTROL LABELS
The vehicle manufacturer's emission control label, also known
as the underhood tune-up label or Vehicle's Underhood Emission Control
System (VECI) label, is located in the engine compartment. Information\
regarding year model of vehicle, engine size, number of cylinders,
emission equipment or type, engine tune-up specifications, whether
vehicle was manufactured for sale in California or is a Federal
vehicle, vacuum hose routing schematic, etc., can be found on this
label. See Fig. 1.
In addition to the VECI label, some emission control
inspection and maintenance programs may require an additional label to
be affixed to the vehicle in special circumstances. For example, in
California, a Bureau Of Automotive Repair (BAR) engine label may be
affixed to the left door post. A BAR engine label is only used when
the vehicle has an engine change, approved modification or is a
Specially Constructed (SPCN) or an acceptable Gray market vehicle.
Check your state's emission control inspection and maintenance laws to
determine if a similar label is used.
Fig. 1: Typical Emission Control Label
Courtesy of General Motors Corp.
EMISSION CONTROL VISUAL INSPECTION
* PLEASE READ THIS FIRST *
NOTE: The following emission control visual inspection procedures
should be used as a guide only. When performing a visual
inspection, always follow your state's recommended