Mitsubishi Montero (1991+). Manual - part 37

 

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Mitsubishi Montero (1991+). Manual - part 37

 

 

cable. Using digital voltmeter, backprobe terminal No. 19 (Green/White

wire) and terminal No. 24 (Black or Green/Black wire) at Engine

Control Unit (ECU) wiring harness connector. Check TPS output voltage.

         2) If output voltage is .48-.52 volt, go to step 3). If

output voltage is not .48-.52 volt, remove throttle body. Loosen TPS

mounting screws and rotate TPS clockwise, or counterclockwise, until

output voltage is within specification. Tighten TPS mounting screws.

         3) Turn ignition off. Disconnect voltmeter from ECU harness

connector. Adjust throttle cable. Disconnect negative battery cable

for at least 10 seconds to clear diagnostic code. Reconnect negative

battery cable. Operate engine at idle for about 5 minutes to ensure

engine idles smoothly.

         Test No. 3

         1) Turn ignition on for more than 15 seconds. DO NOT start

engine. Turn ignition off. This should fully retract ISC plunger.

         2) Ensure ISC plunger is fully retracted. Disconnect TPS

harness connectors. Connect Test Harness (MD998474) between

connectors. Connect digital voltmeter between Red and Blue wires of

test harness.

         3) Turn ignition on. DO NOT start engine. TPS voltage should

be .48-.52 volt. If TPS voltage is .48-.52 volt, go to step 4). If TPS

voltage is not .48-.52 volt, loosen TPS mounting screws and rotate TPS

clockwise, or counterclockwise, until correct voltage is obtained.

Tighten TPS mounting screws.

         4) Turn ignition off. Disconnect voltmeter and remove test

harness. Reconnect TPS harness connectors. Adjust throttle cable.

Start engine and check idle speed.

         5) Turn ignition off. Disconnect negative battery cable for

at least 10 seconds to clear diagnostic trouble code. Reconnect

negative battery cable. Operate engine at idle for about 5 minutes to

ensure engine idles smoothly.

         Test No. 4

         1) Loosen throttle cable. Disconnect electrical connector

from TPS. Connect digital ohmmeter between Green/White and

Green/Yellow wire terminals of TPS electrical connector (on TPS side

of harness).

         2) Insert .026" (.66 mm) feeler gauge between fixed Speed

Adjusting Screw (SAS) and throttle lever. See  Fig. 4. Loosen TPS

mounting screws. Rotate TPS fully clockwise. Check for continuity

between Green/White wire and Green/Yellow wire terminals of TPS

electrical connector.

         3) Rotate TPS counterclockwise until ohmmeter registers no

continuity. Tighten TPS mounting screws and reconnect TPS electrical

connector.

         4) Using digital voltmeter, backprobe terminal No. 19

(Green/White wire) and terminal No. 24 (Black or Green/Black wire) at

Engine Control Unit (ECU) wiring harness connector. Turn ignition on.

DO NOT start engine. Check TPS output voltage.

         5) If TPS output voltage is 0.4-1.0 volt, go to step 6). If

TPS output voltage is not 0.4-1.0 volt, check TPS and wiring harness

for damage or malfunction. Replace TPS or repair wiring harness if

necessary and go to next step.

         6) Remove feeler gauge. Turn ignition off. Disconnect

voltmeter from ECU connector. Adjust throttle cable. Operate engine at

idle for about 5 minutes to ensure engine idles smoothly and within

specification.

         Test No. 5

         1) Disconnect electrical connector from TPS. Connect digital

ohmmeter between Yellow/Red wire and Black wire terminals of TPS.

         2) Insert .026" (.66 mm) feeler gauge between fixed Speed

Adjusting Screw (SAS) and throttle lever. See  Fig. 4. Loosen TPS

mounting screws. Rotate TPS fully counterclockwise. Check for

continuity between Yellow/Red wire and Black wire terminals of TPS.

         3) Rotate TPS clockwise until ohmmeter registers no

continuity. Tighten TPS mounting screws. Reconnect TPS electrical

connector.

         4) Use a digital voltmeter to backprobe terminal No. 19

(Brown/Red wire) and terminal No. 24 (Brown wire) at Engine Control

Unit (ECU) wiring harness on SOHC vehicles, or terminal No. 64

(Brown/Red wire) and terminal No. 72 (Black wire) on DOHC vehicles.

Turn ignition on. DO NOT start engine. Check TPS output voltage.

         5) If TPS output voltage is 0.4-1.0 volt, go to step 6). If

TPS output voltage is not 0.4-1.0 volt, check TPS and wiring harness

for damage or malfunction. Replace TPS or repair wiring harness if

necessary and go to step 6).

         6) Remove feeler gauge. Turn ignition off. Disconnect

voltmeter from ECU connector. Operate engine at idle for about 5

minutes to ensure engine idles smoothly and within specification.

         IDLE POSITION SWITCH

NOTE:    Idle position switch is preset by manufacturer. Adjustment

         is usually not necessary. If other procedures in this

         article require adjustment of idle position switch or if

         switch setting has been changed, adjust switch as follows.

         1.6L Mirage, 2.0L Eclipse & 2.0L Galant (DOHC)

         1) Loosen throttle cable. Disconnect electrical connector

from idle position switch. See Fig. 5. Loosen lock nut at base of

switch. Turn switch counterclockwise until throttle valve is fully

closed.

         2) Connect ohmmeter between switch terminal and switch body

(ground). Turn idle position switch clockwise until ohmmeter registers

continuity. At this point, throttle valve should begin to open.

         3) Turn switch 15/16 of a turn beyond contact point. Tighten

lock nut at base of idle position switch, holding switch to prevent it

from turning while tightening.

         4) Adjust throttle cable. Adjust basic idle speed. See BASIC

IDLE SPEED. Adjust TPS. See TPS ADJUSTMENT.

         All Other Models

         Idle position switch is incorporated in ISC motor and is

automatically adjusted when TPS is adjusted. See TPS ADJUSTMENT.

Fig. 5:  Idle Position Switch Location (1.6L & 2.0L (VIN R &U))

Courtesy of Mitsubishi Motor Sales of America.

ALTERNATOR & REGULATOR 



1991 Mitsubishi Montero

         1991 ELECTRICAL

         Alternators & Regulators

         Colt, Colt Vista, Colt 200, Ram-50, Stealth, Summit;

         Eclipse, Galant, Mirage, Montero, Pickup, Precis, 3000GT

         DESCRIPTION

         Mitsubishi alternators are conventional 3-phase, self-

rectifying type units containing 6 diodes (3 positive and 3 negative)

which are used to rectify current. All models use a case-mounted

Integrated Circuit (IC) voltage regulator.

         Alternator relay or resistor with diode is used to ensure

charging of battery even if charging indicator light is defective. See

Figs. 1-9.

Fig. 1:  Charging System Wiring Schematic (Colt, Mirage & Summit)

Courtesy of Mitsubishi Motor Sales of America.

Fig. 2:  Charging System Wiring Schematic (Colt Vista)

Courtesy of Chrysler Motors.

 

 

 

 

 

 

 

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