Throttle valve MITSUBISHI MONTERO 1998 Service Manual
[x] Cancel search | Manufacturer: MITSUBISHI, Model Year: 1998, Model line: MONTERO, Model: MITSUBISHI MONTERO 1998Pages: 1501, PDF Size: 25.81 MB
Page 14 of 1501
![MITSUBISHI MONTERO 1998 Service Manual Accessory Mount Stay Bolt (Montero)
8 mm Bolt .............................................. 17 (23)\
10 mm Bolt ............................................. 36 (49)\
Cooling Fan Br](/img/19/57333/w960_57333-13.png "MITSUBISHI MONTERO 1998 Service Manual Accessory Mount Stay Bolt (Montero)
8 mm Bolt .............................................. 17 (23)\
10 mm Bolt ............................................. 36 (49)\
Cooling Fan Br")
Accessory Mount Stay Bolt (Montero)
8 mm Bolt .............................................. 17 (23)\
10 mm Bolt ............................................. 36 (49)\
Cooling Fan Bracket (Montero) ............................ 30 (41\
)
Engine Hanger (Montero) .................................. 13 (17\
)
Generator Bolt (Diamante) ................................ 15 (21\
)
Generator Bolt (Montero)
8 mm Bolt .............................................. 15 (21)\
10 mm Bolt ............................................. 38 (51)\
Generator Bracket (Diamante)
8 mm Bolt .............................................. 35 (48)\
10 mm Bolt ............................................. 17 (23)\
Generator Pivot Nut (Diamante) ........................... 32 (44\
)
Tensioner Pulley Nut ..................................... 37 (50)\
Tensioner Bracket Stay Bolt (Montero) .................... 18 (24\
)
Intake Manifold & Fuel
Bracket (Montero) ........................................ 18 (24\
)
ECT Sensor ............................................... 22 (30)\
Intake Manifold Nut ...................................... 15 (21)\
Thermostat Case .......................................... 14 (19)\
Water Inlet Fitting Bolt ................................. 14 (19)\
Water Outlet Fitting Bolt ................................ 14 (19)\
Water Passage (Montero) .................................. 14 (19\
)
Heater Pipe Bolt (Diamante) .............................. 13 (18\
)
Intake Plenum & Throttle Body
Air Intake Fitting Bolt & Nut (Montero) .................. 13 (18\
)
EGR Pipe Bolt ............................................ 13 (18)\
EGR Pipe Flair Nut ....................................... 44 (59)\
EGR Valve Bolt ........................................... 16 (22)\
Intake Manifold Plenum (Diamante) ........................ 13 (18\
)
Intake Manifold Plenum Stay Bolt
8 mm Bolt .............................................. 13 (18)\
10 mm Bolt ............................................. 27 (36)\
Water Outlet Fitting Bracket Bolt ........................ 14 (19)\
Bracket (Diamante) ....................................... 18 (24\
)
Motor Mount Brackets
Bracket
8 mm Bolt .............................................. 16 (22)\
10 mm Bolt ............................................. 30 (41)\
12 mm Bolt ............................................. 55 (75)\
Oil Pan & Oil Pump
Drain Plug ............................................... 30 (40)\
Oil Cooler By-Pass Valve (Montero) ....................... 41 (55\
)
Oil Filter Bolt (Montero) ................................ 15 (21\
)
Oil Filter Bracket
8 mm Bolt .............................................. 18 (24)\
10 mm Bolt ............................................. 30 (40)\
Oil Screen
8 mm Bolt ............................................... 14 (19)\
Plug .................................................... 33 (45)\
Piston & Connection Rod
Connecting Rod Cap Nut ................................... 38 (52)\
Rocker Arms & Camshafts
Distributor Adapter Bolt (Diamante) ...................... 17 (23\
)
Rocker Arm Shaft Bolt .................................... 23 (31)\
Spark Plug ................................................. 18 (25)\
Timing Belt
Auto Tensioner Bolt ...................................... 18 (24)\
Camshaft Sprocket Bolt ................................... 65 (88)\
Idler Pulley Bolt ........................................ 32 (44)\
Tensioner Arm Bolt ....................................... 32 (44)\
Tensioner Pulley Bolt .................................... 36 (49)\
Water Pump Bolt (Montero) ................................ 18 (24\
)
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RVB Rear Vacuum Break
RWAL Rear Wheel Anti-Lock Brake
RWD Rear Wheel Drive
Recirc. Recirculate or Recirculation
Reg. Regulator
Rly. Relay
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"S" ABBREVIATION TABLE
"S" ABBREVIATION TABLE \
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ABBREVIATION DEFINITION
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SAW Spark Angle Word
SBC Single Bed Converter
SBEC Single Board Engine Controller
SC Super Charged
SCC Spark Control Computer
SCS Air Suction Control Solenoid
SDM Supplemental Restraint System Diagnostic Module
SDU SRS Diagnostic Unit
SEN Sensor
SES Service Engine Soon
SFI Sequential (Port) Fuel Injection
SIG RTN Signal Return circuit
SIL Shift Indicator Light
SIR Supplemental Inflatable Restraint
SMEC Single Module Engine Controller
SOHC Single Overhead Cam
SOL or Sol. Solenoid
SPFI Sequential Port Fuel Injection
SPK Spark Control
SPOUT Spark Output Signal
SRS Supplemental Restraint System (Air Bag)
SS 3/4-4/3 Shift Solenoid circuit
SSI Solid State Ignition
STAR Self-Test Automatic Readout
STI Self Test Input circuit
STO Self-Test Output
SUB-O2 Sub Oxygen Sensor
Sen. or Sens. Sensor
Sol. Solenoid
Sprchg. Supercharger
Strg. Steering
Susp. Suspension
Sw. Switch
Sys. System
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"T" ABBREVIATION TABLE
"T" ABBREVIATION TABLE \
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ABBREVIATION DEFINITION
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T.V. Throttle Valve
TAB Thermactor Air By-Pass
TAC Thermostatic Air Cleaner
TAD Thermactor Air Diverter
TAN Tan
TBI Throttle Body Injection
Page 34 of 1501
TCC Torque Converter Clutch
TCCS Toyota Computer Control System
TDC Top Dead Center
TDCL Total Diagnostic Communication Link
TFI Thick Film Ignition system
TGS Top Gear Switch (cancels SIL in top gear)
THERMAC Thermostatic Air Cleaner
THS Transmission Hydraulic Switch
TP/TPS Throttle Position Sensor
TPI Tuned Port Injection
TPS Throttle Position Sensor/Switch
TS Temperature Sensor
TSB Technical Service Bulletin
TTS Transmission Temperature Switch
TV Thermovalve
TWC Three-Way Catalyst
Temp. Temperature
Trans. Transaxle/Transmission
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"V" ABBREVIATION TABLE
"V" ABBREVIATION TABLE \
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ABBREVIATION DEFINITION
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V Valve
VAF Vane Air Flow sensor or circuit
VAPS Variable Assist Power Steering
VAT Vane Air Temperature
VATS Vehicle Anti-Theft System
VBATT Vehicle Battery Voltage
VCC Viscous Converter Clutch
VIN Vehicle Identification Number
VIO Violet
VLR Volt Loop Reserve
VM Vacuum Modulator
VM Vane Meter
VOM Volt-Ohmmeter (Analog)
VPWR Vehicle Power supply voltage (10-14 volts)
VREF Voltage Reference (ECA supplied reference voltage
VRV Vacuum Regulator Valve
VSC Vehicle Speed Control sensor or signal
VSS Vehicle Speed Sensor or signal
VSV Vacuum Switching Valve
Vac. Vacuum
Volt. Voltage
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"W" ABBREVIATION TABLE
"W" ABBREVIATION TABLE \
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ABBREVIATION DEFINITION
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W/ With
W/O Without
WAC WOT A/C Cut-off switch or circuit
WAC Wide Open Throttle A/C Switch
WHT White
WOT Wide Open Throttle
YEL Yellow
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this information to control solenoids on transmission valve body. TCM
controls transmission shifting and torque converter lock-up.
TCM contains a self-diagnostic system, which will store
Diagnostic Trouble Codes (DTC) if failure or problem exists in
electronic control system. DTC can be retrieved to determine problem
area. See SELF-DIAGNOSTIC SYSTEM. TCM is located under left side of
instrument panel, left of steering column. See Fig. 1.
TCM INPUT DEVICES
Brakelight Switch Signal
Brakelight switch delivers input signal to TCM, indicating
vehicle braking. Brakelight switch is located on brake pedal support.
Cruise Control Electronic Control Unit (ECU)
Cruise control ECU delivers an input signal to control
overdrive operation in accordance with vehicle speed when cruise
control is operating. When in overdrive with cruise control on, if
vehicle speed drops 2 MPH less than the set speed, overdrive is
released to prevent reduction in vehicle speed. Once vehicle speed is
more than the set speed, overdrive function is resumed. If coolant
temperature is low, transmission will not shift into overdrive. Cruise
control ECU is located below center A/C vent, behind temperature
control panel on Montero. On Montero Sport, cruise control ECU is
located behind driver's kick panel.
Engine Coolant Temperature Sensor (ECT) Signal
Engine coolant temperature sensor delivers input signal to
TCM, indicating engine coolant temperature. Coolant temperature sensor
is located on engine.
Input & Output Shaft Speed Sensors
Sensors are magnetic pick-ups that monitor input and output
shaft speeds. AC waveforms are input to TCM by sensors. Sensors are
located on front and rear side of transmission case.
OD Switch Signal
The OD switch provides an input signal to TCM to indicate
when overdrive is selected by operator. When OD switch is depressed to
ON position, transmission will shift into 4th gear when shift lever is
in "D" position, and OD OFF light on instrument panel will go off.
When OD switch is released to OFF position, transmission will shift
into 3rd gear, and OD OFF light on instrument panel will come on. The
OD switch is mounted on shift lever.
Oil Temperature Sensor Signal
Oil temperature sensor provides TCM with ATF temperature
values. TCM uses this information to control shift points for maximum
performance. If transmission oil temperature exceeds standard values,
instrument panel ATF - TEMP light will come on. Sensor is mounted to
cooler line at transmission.
Park/Neutral Position (PNP) Switch Signal
PNP switch delivers an input signal to TCM indicating shift
lever position. Switch is located on side of transmission.
Throttle Position (TP) Sensor Signal
TP sensor delivers closed throttle and variable throttle
position input signals to TCM. TP sensor is located on side of
throttle body.
4WD Low Range Detection Switch
4WD low range detection switch provides information to TCM
Page 173 of 1501
SOLENOIDS
Removal & Installation
Solenoids are located on transmission valve body. See Fig. 3.
Remove bolt, solenoid and gasket from valve body. To install, reverse
removal procedure.
THROTTLE POSITION SENSOR
NOTE: For removal and installation information, see appropriate
SELF-DIAGNOSTICS article in ENGINE PERFORMANCE section.
TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS \
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Application INCH Lbs. (N.m)\
Park/Neutral Switch Bolt .................................. 48 (5.4)\
Park/Neutral Switch Lock Nut .............................. 35 (4.0)\
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WIRING DIAGRAMS
Page 322 of 1501
Throttle Position Sensor
1) Disconnect sensor connector. Resistance between terminals
No. 1 and 4 should be 3500-6500 ohms. Use an analog ohmmeter to
measure resistance between terminals No. 1 and 3. See Fig. 25.
2) Slowly open throttle valve to wide open throttle.
Resistance should change smoothly as throttle is opened. Replace
throttle position sensor if it does not test as specified.
CRUISE CONTROL INDICATOR TEST
With combination meter (instrument cluster) removed, check
for continuity between terminals No. 4 and 5. See Fig. 33. If there is
no continuity, replace cruise control indicator bulb.
Fig. 33: Identifying Combination Meter Connector
Courtesy of Mitsubishi Motor Sales of America
CRUISE CONTROL SWITCH TESTS
CANCEL, SET & RESUME Switches
1) Remove lower steering column cover. Disconnect 2-pin
switch connector. Operate and test switch. When CANCEL switch is
operated between terminals No. 1 and 2, zero ohms resistance should be
indicated.
2) When RESUME switch is operated, 820 ohms resistance should
be present between terminals No. 1 and 2. When SET switch is operated,
2700 ohms resistance should be present between terminals No. 1 and 2.
Replace cruise control switch if it does not test as specified.
Page 326 of 1501
check cruise control ECU connector C-50 and joint connector C-130.
Repair as necessary. See Figs. 13, 16 and 28. If malfunction remains,
check harness between combination meter (instrument cluster) and
cruise control ECU. Repair as necessary.
3) Disconnect combination meter connector C-04. See Fig. 9.
Check for continuity at harness side between terminal No. 43 and
ground. If continuity is present, go to next step. If continuity is
not present, check harness between combination meter and ground.
Repair as necessary.
4) Inspect combination meter connector C-04. If connector is
defective, repair as necessary. If connector is okay and malfunction
remains, replace cruise control ECU.
CODE 14: VACUUM PUMP POWER SUPPLY
Code 14 is displayed when drive signals for vacuum pump
release valve, control valve and motor are not input into cruise
control ECU. Probable causes are:
* Malfunction of stoplight switch.
* Malfunction of connector.
* Malfunction of harness.
* Malfunction of cruise control ECU.
1) Disconnect vacuum pump connector A-105. See Fig. 6. At
harness side of connector, check voltage between terminal No. 1 and
ground. If battery voltage is present, go to next step. If battery
voltage is not present, check stoplight switch. See
BRAKELIGHT/STOPLIGHT SWITCH TEST under COMPONENT TESTS. Replace as
necessary. If switch is okay, check connectors to combination meter,
stoplight switch and vacuum pump. Repair as necessary. If connectors
are okay and malfunction remains, check and repair circuit between
cruise control ECU and vacuum pump. If malfunction remains, replace
cruise control ECU.
2) Check connectors and circuit between cruise control ECU
and vacuum pump. See WIRING DIAGRAMS. Repair as necessary. If
connectors and circuit are okay, replace cruise control ECU.
CODE 15: CRUISE CONTROL SWITCH
Code 15 is displayed if RESUME switch or SET switch remains
on. Probable cause is malfunction of cruise control switch. Replace
cruise control switch.
CODE 16: CRUISE CONTROL ECU
Code 16 is displayed if there is an abnormality in CANCEL
hold circuit or microprocessor monitor circuit in cruise control ECU.
Probable cause is malfunction of cruise control ECU. Replace cruise
control ECU.
CODE 17: THROTTLE POSITION SENSOR
Code 17 is displayed if a voltage of 1.5 volts or more exists
when closed throttle position switch is ON or 0.2 volt or less exists
when closed throttle position switch is OFF for a continuous period of
4 seconds or more. Probable causes are:
* Malfunction of throttle position sensor.
* Malfunction of connector.
* Malfunction of harness.
* Malfunction of cruise control ECU.
Page 339 of 1501
manufacturer's original setting has been changed.
1) Loosen throttle cable. Loosen fixed SAS lock nut. See
Fig. 7. Turn fixed SAS counterclockwise until throttle valve is fully
closed. Turn fixed SAS clockwise until throttle valve begins to open.
Turn fixed SAS clockwise 1 1/4 turns after throttle valve begins to
open.
2) Tighten lock nut while holding fixed SAS in position.
Adjust throttle cable. Adjust basic idle speed. See BASIC IDLE SPEED.
Adjust Throttle Position (TP) sensor. See TP SENSOR ADJUSTMENT under
THROTTLE POSITION (TP) SENSOR.
Fig. 7: Adjusting Fixed Speed Adjusting Screw (Typical)
Courtesy of Mitsubishi Motor Sales of America
IDLE MIXTURE
NOTE: Idle mixture is computer controlled on fuel injected engines
and is nonadjustable. CO level should not exceed .5%. HC
level should not exceed 100 ppm. If mixture levels exceed
limits, see G - TESTS W/CODES article.
THROTTLE POSITION (TP) SENSOR
TP SENSOR ADJUSTMENT
NOTE: Ensure basic idle speed is set to specification before
adjusting TP sensor. See BASIC IDLE SPEED under IDLE SPEED &
Page 340 of 1501
MIXTURE. Perform all adjustments with engine at normal
operating temperature, front wheels in straight-ahead
position, cooling fan and all accessories off, and
transmission in Park or Neutral.
Eclipse 2.0L Non-Turbo
1) TP sensor is not adjustable. Disconnect TP sensor
connector. Using external ohmmeter, measure resistance between TP
sensor terminals No. 1 and 3. See Fig. 8. If resistance is not 3500-
6500 ohms, replace TP sensor.
2) While slowly rotating throttle valve from idle to full
open, measure resistance between TP sensor terminals No. 2 and 3. If
resistance does not change smoothly in proportion to throttle opening,
replace TP sensor.
Montero
1) Disconnect TP sensor connector. Using jumper wires,
connect an external ohmmeter between TP sensor terminals No. 1 and 2.
See Fig. 9 . Insert .025" (.65 mm) feeler gauge between fixed speed
adjusting screw and throttle lever.
2) Loosen TP sensor mounting screws and rotate TP sensor
fully clockwise. Ensure there is continuity between terminals No. 1
and 2. Rotate TP sensor counterclockwise until there is no continuity,
and tighten screws. Install Test Harness (MB991348) between TP sensor
and harness connector.
3) Turn ignition on. Using external voltmeter, measure TP
sensor output voltage between terminals No. 1 and 3. If voltage is not
.4-1.0 volt, check harness and sensor. See DTC P0120 in G - TESTS
W/CODES article.
All Other Models
1) Disconnect TP sensor connector. Using jumper wires,
connect an external ohmmeter between TP sensor terminals No. 1 and 2
on Diamante or No. 3 and 4 on all other models. See Fig. 9. On
Diamante and Mirage 1.8L with cruise control, insert .055" (1.40mm)
feeler gauge between fixed speed adjusting screw and throttle lever.
On Galant, insert .025" (.65 mm) feeler gauge between fixed speed
adjusting screw and throttle lever. On all other models, insert .018"
(.45 mm) feeler gauge between fixed speed adjusting screw and throttle\
lever.
2) Loosen TP sensor mounting screws and rotate TP sensor
fully counterclockwise. Ensure there is continuity between terminals
No. 1 and 2 on Diamante, or No. 3 and 4 on all other models. Rotate TP
sensor clockwise until there is no continuity and tighten screws.
Install Test Harness (MB991348) between TP sensor and harness
connector.
3) Turn ignition on. Using external voltmeter, measure TP
sensor output voltage between terminals No. 1 and 3 on Diamante, or
No. 2 and 4 on all other models. If voltage is not .4-1.0 volt, check
harness and sensor. See DTC P0120 in G - TESTS W/CODES article.
Fig. 8: TP Sensor Connector Terminals (Eclipse 2.0L Non-Turbo)
Courtesy of Mitsubishi Motor Sales of America
Page 455 of 1501
E - THEORY/OPERATION
1998 Mitsubishi Montero
1998 ENGINE PERFORMANCE
Mitsubishi - Theory & Operation
Diamante, Eclipse, Galant, Mirage, Montero, Montero Sport,
3000GT
INTRODUCTION
This article covers basic description and operation of engine
performance-related systems and components. Read this article before
diagnosing vehicles or systems with which you are not completely
familiar.
AIR INDUCTION SYSTEM
NON-TURBOCHARGED ENGINES
Mirage equipped with 1.5L engine uses a Manifold Absolute
Pressure (MAP) sensor instead of a Volume Airflow (VAF) sensor.
Filtered air is ducted to a plenum-mounted throttle body.
All other models use same basic air induction system using a
remote air filter (with VAF sensor) connected to a plenum-mounted
throttle body.
TURBOCHARGED ENGINES
In addition to basic air induction system, turbocharging
system components include turbocharger(s), charge air cooler(s), air\
by-pass valve(s), wastegate actuator(s), wastegate control solenoid
valve(s) and intake duct(s).
Wastegate Control Solenoid Valve(s)
Powertrain Control Module (PCM) energizes solenoid valve(s)\
,
controlling bleed-off rate of turbocharger pressure by wastegate
actuator(s).
COMPUTERIZED ENGINE CONTROLS
Sequential Fuel Injection (SFI) is a computerized engine
control system, which controls fuel injection, ignition timing, idle
speed and emission control systems.
POWERTRAIN CONTROL MODULE (PCM)
PCM, also known as Engine Control Module (ECM), receives and
processes signals from input devices. Operating conditions such as
cold starting, altitude, acceleration and deceleration affect input
device signals. Based on signals received, PCM sends signals to
various components, which control fuel injection, ignition timing,
idle speed and emission control systems. For PCM location, see
PCM LOCATION table.
PCM LOCATION TABLE
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Application Location
Eclipse 2.0L Non-Turbo .......... In Front of Left Front Strut Tower