Sending unit MITSUBISHI MONTERO 1998 User Guide

Eclipse 2.0L Non-Turbo With A/T
Disconnect sensor harness connector. Check resistance between
sensor terminals. Resistance should be 300-1200 ohms. Replace sensor
as necessary.
OIL PRESSURE GAUGE
Circuit Test (Eclipse, Montero & 3000GT)
1) Disconnect oil pressure gauge wiring connector from
sending unit inside engine compartment. Connect a 12-volt test light
between harness connector terminal and ground. Turn ignition on, but
DO NOT start engine.
2) If test light comes on and gauge needle moves, go to GAUGE
RESISTANCE TEST. If test light does not come on and gauge needle does
not move, repair wiring to sending unit.
Gauge Resistance Test (Eclipse, Montero & 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 continuity between oil pressure gauge
terminals. See Fig. 17, 18 or 19. See
OIL PRESSURE GAUGE RESISTANCE SPECIFICATIONS table. If resistance is
not within specification, replace oil pressure gauge.
OIL PRESSURE GAUGE RESISTANCE SPECIFICATIONS TABLE









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Application Ohms
Eclipse & 3000GT ................................... 40-44
Montero ............................................... 50









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Fig. 17: Oil Pressure Gauge Resistance Test Terminals (Eclipse)
Courtesy of Mitsubishi Motor Sales of America

unit. Turn ignition on. Check voltage between ground and sending unit
harness-side connector. If battery voltage is present, problem is
intermittent. If battery voltage is not present, go to next step.
2) Check sending unit harness connector. Repair as necessary.
If connector is okay, check circuit (Yellow wire) between oil pressure\
gauge and oil pressure sending unit. See WIRING DIAGRAMS. Repair as
necessary. If circuit is okay, go to next step.
3) Remove multi-meter assembly. Check voltage between ground
and harness-side connector terminal No. 10 (Red/Black wire). See
WIRING DIAGRAMS . If battery voltage is present, problem is
intermittent. If battery voltage is not present, go to next step.
4) Check harness connector to multi-meter assembly. Repair as
necessary. If connector is okay, check circuit between multi-meter
harness connector and fusible link No. 6. See WIRING DIAGRAMS. Repair
as necessary. If circuit is okay, go to next step.
5) Turn ignition on. Check voltage between ground and multi-
meter harness-side connector terminal No. 11 (Black/White wire). See
WIRING DIAGRAMS . If battery voltage is present, problem is
intermittent. If battery voltage is not present, go to next step.
6) Check harness connector to multi-meter assembly. Repair as
necessary. If connector is okay, check circuit between multi-meter
assembly harness connector and ignition switch. See WIRING DIAGRAMS.
Repair as necessary. If circuit is okay, go to next step.
7) Turn ignition off. Check continuity between ground and
multi-meter assembly harness-side connector terminal No. 3 (Black
wire). If continuity is present, problem is intermittent. If
continuity is not present, go to next step.
8) Check harness connector to multi-meter assembly. Repair as
necessary. If connector is okay, check circuit (Black wire) between
multi-meter assembly harness connector and ground. See WIRING DIAGRAMS
. Repair as necessary. If circuit is okay, problem is intermittent.
Gauge Sending Unit Resistance Test (Montero Sport)
Disconnect harness connector to oil pressure sending unit.
Start and idle engine. Check resistance between oil pressure gauge
sending unit terminal and engine block. Resistance should be about 2
ohms. Replace sending unit if resistance is not as specified.
REED SWITCH
Continuity Check (Montero)
1) Remove instrument cluster. See INSTRUMENT CLUSTER under
REMOVAL & INSTALLATION. Check continuity between reed switch terminals
No. 1 and 2. See Fig. 20.
2) Ensure continuity pulses on and off 4 times per revolution
of speedometer shaft connection. If continuity is not as specified,
replace reed switch.
Fig. 20: Identifying Reed Switch Test Terminals (Montero)
Courtesy of Mitsubishi Motor Sales of America
SPEEDOMETER TEST

speedometer.
TEMPERATURE GAUGE
CAUTION: DO NOT connect sender wire directly to ground during test.
Circuit Test
1) Disconnect temperature sender wire from sending unit.
Connect a 12-volt, 3.4-watt test light between connector terminal and
ground. Turn ignition switch to ON position.
2) If test light flashes and temperature gauge needle moves,
go to SENSOR RESISTANCE TEST. If test light does not flash or gauge
needle does not move, repair wiring to sending unit.
Sensor Resistance Test
1) Remove Engine Coolant Temperature (ECT) sensor from
engine. See COMPONENT LOCATIONS . Place sending unit in 158
F (70C)
water. Check sensor resistance using ohmmeter.
2) ECT sensor resistance should be 90-117 ohms. If ECT sensor
resistance is okay, go to GAUGE RESISTANCE TEST. Replace ECT sensor if
resistance is not as specified.
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 temperature gauge
terminals at rear of cluster or combination gauges. See
TEMPERATURE GAUGE RESISTANCE SPECIFICATIONS table. See Fig. 21, 22,
23, 24, 25, 26, 27 or 28.
TEMPERATURE GAUGE RESISTANCE SPECIFICATIONS TABLE









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Application ( 1) Terminals Ohms
Eclipse ............... "A" & "B" .............. 161-197
Eclipse ............... "A" & "C" ................ 51-57
Eclipse ............... "B" & "C" .............. 210-256
Galant ................ "B" & "C" .................. ( 2)
Mirage ................ "A" & "B" ................ 86-95
Mirage ................ "A" & "C" .............. 168-206
Mirage ................ "B" & "C" .............. 222-272
Montero ............... No. 4 & 8 .............. 103-128
Montero ............... No. 4 & 9 .............. 221-271
Montero ............... No. 8 & 9 .............. 130-160
Montero Sport ......... "A" & "B" ................... 88
Montero Sport ......... "A" & "C" .................. 103
Montero Sport ......... "B" & "C" .................. 191
3000GT ................ "A" & "B" ................... 51
3000GT ................ "A" & "C" .................. 139
3000GT ................ "B" & "C" .................. 190
( 1) - See Fig. 21, 22, 23, 24, 25, 26, 27 or 28.
( 2) - With positive battery voltage applied to terminal "A",
battery ground applied to terminal "C" and a 50-ohm
resistor connected between battery ground and terminal
"B", needle should be about 1/4 position on gauge.









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