Page 818 of 1501
For testing procedures, see DTCs P1103 and P1104 in G - TESTS W/CODES
article.
COMPUTERIZED ENGINE CONTROLS
CONTROL UNIT
NOTE: For Powertrain Control Module (PCM) location, see
POWERTRAIN CONTROL MODULE (PCM) LOCATION table. To identify
PCM power and ground terminals, see appropriate pin voltage
chart in J - PIN VOLTAGE CHARTS article. To identify PCM
power and ground circuits, see appropriate wiring diagram in
L - WIRING DIAGRAMS article.
Ground Circuits
1) Turn ignition off. Using an ohmmeter, check continuity
between chassis ground and PCM ground terminal(s). See Figs. 1-5.
Ohmmeter should indicate zero ohms. If reading is not as specified,
check and repair open circuit between PCM connector and chassis
ground. If reading is as specified, go to next step.
2) Connect voltmeter negative lead to chassis ground. Connect
positive lead to PCM ground terminal(s). With engine running,
voltmeter should indicate less than one volt. If reading is more than
one volt, check for open, corrosion or loose connection in ground
circuit.
Power Circuits
Turn ignition on. Check for battery voltage on both PCM power
terminals. See Figs. 1-5. If battery voltage is not present, check
operation of MFI relay. See RELAYS under MOTORS, RELAYS & SOLENOIDS.
POWERTRAIN CONTROL MODULE (PCM) LOCATION TABLE
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Application Location
Eclipse 2.0L Non-Turbo .................. In Front Of Left
Front Strut Tower
Mirage & Montero Sport .............. Behind Right Side Of
Instrument Panel (Glove Box)
Montero ........................... Right Front Kick Panel
All Other Models ................... Behind Center Console
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Fig. 1: Identifying PCM Terminals (Diamante)
Courtesy of Mitsubishi Motor Sales of America
Fig. 2: Identifying PCM Terminals (Eclipse 2.0L Non-Turbo)
Courtesy of Mitsubishi Motor Sales of America
Page 823 of 1501
INSTRUMENT PANEL
1998 Mitsubishi Montero
1998 ACCESSORIES & EQUIPMENT
Mitsubishi - Instrument Panels
Eclipse, Galant, Mirage, Montero, Montero Sport, 3000GT
DESCRIPTION & OPERATION
WARNING: Deactivate air bag system before performing any service
operation. See AIR BAG RESTRAINT SYSTEMS article. Do not
apply electrical power to any component on steering column
without first deactivating air bag system. Air bag may
deploy.
Instrument cluster includes speedometer, fuel gauge and
temperature gauge. Fuel gauge has a built-in voltage limiter to keep
voltage supply to gauges at 7 volts. Some models may also have an
ammeter, oil pressure gauge, tachometer, voltmeter and/or turbo boost
pressure gauge. Oil pressure gauge uses full battery voltage.
Tachometer operates by pulse feed.
COMPONENT LOCATIONS
COMPONENT LOCATIONS TABLE \
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Component Location
Engine Coolant Temperature (ECT) Sensor
Eclipse, Galant, Montero
& Montero Sport ................. On Thermostat Housing
Mirage ........................ On Rear Of Cylinder Head
3000GT ........... On Cylinder Head, Below Ignition Coil
Input Speed Sensor
Eclipse ........................... On Side Of Transaxle
Output Speed Sensor
Eclipse ........................... On Side Of Transaxle
Vehicle Speed Sensor
Eclipse, Galant,
Mirage & 3000GT ................... On Top Of Transaxle
Montero & Montero Sport ...... On Transmission Tailshaft
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TROUBLE SHOOTING
FUEL/TEMPERATURE GAUGE NOT WORKING
Check for blown fuse, faulty voltage limiter and faulty
relay. Ensure sending unit connections are clean and tight. Test
sending unit for correct operation. Tighten connections in instrument
cluster.
SPEEDOMETER NOT WORKING
On mechanical-type speedometers, ensure speedometer cable is
properly connected and correctly routed. If speedometer pointer and/or
odometer still do not work, replace speedometer cable or speedometer
assembly.
On electric-type speedometers, check for faulty vehicle speed
sensor, input/output sensors or faulty circuit. For testing, see
Page 824 of 1501
SPEEDOMETER TEST under COMPONENT TESTS. Repair or replace as
necessary.
TACHOMETER NOT WORKING
Tachometer is serviced as an assembly. If wiring harness is
okay, replace tachometer assembly.
WARNING LIGHTS NOT WORKING
Test for defective sending unit, burned-out bulb and broken
printed circuit. Ensure all connections are clean and tight.
COMPONENT TESTS
BOOST PRESSURE GAUGE (TURBO)
Resistance Test (Eclipse & 3000GT)
1) Remove instrument cluster from instrument panel. See
INSTRUMENT CLUSTER under REMOVAL & INSTALLATION. On 3000GT, remove air
distribution duct and combination gauges.
2) On all models, check resistance between boost pressure
gauge terminals on back of instrument cluster or combination gauges.
See Fig. 1 or 2. Resistance should be 68.2-83.4 ohms on Eclipse, or 72
ohms on 3000GT. If resistance is not as specified, replace gauge.
Fig. 1: Boost Pressure Gauge Test Terminals (Eclipse Turbo)
Courtesy of Mitsubishi Motor Sales of America
Page 829 of 1501
Fig. 9: Identifying Fuel Gauge Test Connections (3000GT)
Courtesy of Mitsubishi Motor Sales of America
NOTE: Fuel gauge resistance test must be completed with instrument
panel cluster removed. Use ohmmeter for all measurements. If
resistance is extremely low, a short may exist in coil. If
resistance is extremely high, a broken wire or similar
Page 830 of 1501
problem may exist in gauge.
Resistance Test
1) Remove instrument cluster. See INSTRUMENT CLUSTER under
REMOVAL & INSTALLATION. On 3000GT, remove air distribution duct and
combination gauges.
2) On all models, check resistance between appropriate
terminals of instrument cluster or combination gauges. See Fig. 10,
11, 12, 13, 14, 15 or 16. See FUEL GAUGE RESISTANCE SPECIFICATIONS
table. If resistance readings are not as specified, replace fuel
gauge.
FUEL GAUGE RESISTANCE SPECIFICATIONS TABLE
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Application ( 1) Terminals Ohms
Eclipse ............... "A" & "B" .............. 219-279
Eclipse ............... "A" & "C" .............. 102-152
Eclipse ............... "B" & "C" .............. 112-132
Galant ................ "A" & "B" ................... 99
Galant ................ "A" & "C" .................. 262
Galant ................ "B" & "C" .................. 163
Mirage ................ "A" & "B" ................ 80-98
Mirage ................ "A" & "C" .............. 173-211
Mirage ................ "B" & "C" ............... 93-113
Montero ............... No. 4 & 8 .............. 104-127
Montero ............... No. 4 & 6 .............. 132-162
Montero ............... No. 6 & 8 ................ 71-87
Montero Sport ......... "A" & "B" ................... 85
Montero Sport ......... "A" & "C" .................. 107
Montero Sport ......... "B" & "C" .................. 192
3000GT ................ "A" & "B" .................. 254
3000GT ................ "A" & "C" .................. 101
3000GT ................ "B" & "C" .................. 153
( 1) - For terminal locations, see Fig. 10, 11, 12, 13, 14,
15 or 16.
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Fig. 10: Identifying Instrument Panel Fuel Gauge Resistance Check
Terminals (Eclipse)
Courtesy of Mitsubishi Motor Sales of America
Page 831 of 1501
Fig. 11: Identifying Instrument Panel Fuel Gauge Resistance Check
Terminals (Galant)
Courtesy of Mitsubishi Motor Sales of America
Fig. 12: Identifying Instrument Panel Fuel Gauge Resistance Check
Terminals (Mirage - With Tachometer)
Courtesy of Mitsubishi Motor Sales of America
Page 832 of 1501
Fig. 13: Identifying Instrument Panel Fuel Gauge Resistance Check
Terminals (Mirage - Without Tachometer)
Courtesy of Mitsubishi Motor Sales of America
Fig. 14: Identifying Instrument Panel Fuel Gauge Resistance Check
Terminals (Montero)
Courtesy of Mitsubishi Motor Sales of America
Page 833 of 1501
Fig. 15: Identifying Instrument Panel Fuel Gauge Resistance Check
Terminals (Montero Sport)
Courtesy of Mitsubishi Motor Sales of America
Fig. 16: Identifying Instrument Panel Fuel Gauge Resistance Check
Terminals (3000GT)
Courtesy of Mitsubishi Motor Sales of America
INPUT/OUTPUT SENSOR
