1993 MITSUBISHI 3000GT Replace

Downloaded from www.Manualslib.com manuals search engine ENGINE ELECTRICAL - Starting System16-25
L
Field coil wire27EL0021216Fo264
00002526
MAGNETIC SWITCH RETURN TEST(1) Disconnect field coil wire from M-terminal of magnetic
switch.(2) Connect a 12 V battery between M-terminal and body.
Caution
This test must be performed quickly (in less than 10
seconds) to prevent coil from burning.(3) Pull pinion out and release. If pinion quickly returns to
its original position, everything is in order. If it doesn’t,
replace magnetic switch.
Caution
When pulling out the pinion, be careful not to have
your finger pinched.
STARTER RELAY(1) Remove the starter relay from the relay box.
(2)Connect battery to terminal 2 and check continuity between
terminals with terminal 4 grounded.
Power is supplied3-4 terminals
3-5 terminalsNo continuity
Continuity
/ 3-4 terminals / Continuity 1
Power is not
supplied3-5 terminals
l-2 terminalsNo continuity
Continuity
i
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Downloaded from www.Manualslib.com manuals search engine ENGINE ELECTRICAL - Starting System16-29
ZiELllS
UndercutI
(2) Check the outer diameter of the commutator.
Standard value: 29.4 mm (1.158 in.)
Limit: 28.4 mm (1.118 in.)(3) Check the depth of the undercut between segments.
Standard value: 0.5 mm (.020 in.)
BRUSH HOLDER
Check for continuity between brush holder plate and brush
holder.
The normal condition is non-continuity.
OVERRUNNING CLUTCH
1.While holding clutch housing, rotate the pinion. Drive pinionshould rotate smoothly in one direction, but should not
rotate in opposite direction. If clutch does not function
properly, replace overrunning clutch assembly.
2.Inspect pinion for wear or burrs. If pinion is worn or burred,
replace overrunning clutch assembly. If pinion is damaged,also inspect ring gear for wear or burrs.
FRONT AND REAR BRACKET BUSHING
Inspect bushing for wear or burrs. If bushing is worn or burred,
replace front bracket assembly or rear bracket assembly.
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Downloaded from www.Manualslib.com manuals search engine 16-30ENGINE ELECTRICAL - Starting System
Eq
C-- Wear limit line
-
New brush
Soldered
(Make sure that
there is no
excess solder on
brush surface)
Surface
Amarked
Zl EL049
GrowlerBRUSHES AND SPRINGS REPLACEMENT
1.Brushes that are worn beyond wear limit line, or oil-soaked,
should be replaced.do
2.When replacing field coil brushes, crush worn brush with
pliers, being careful not to damage pigtail.
3.
4.Sand pigtail end with sandpaper to ensure good soldering.
Insert pigtail into hole provided in new brush and solder
it.Make sure that pigtail and excess solder do not come
out onto brush surface.
5.When replacing ground brush, slide the brush from brush
holder by prying retaining spring back.ARMATURE TEST
ARMATURE SHORT-CIRCUIT TEST
1. Place armature in a growler.
2.Hold a thin steel blade parallel and just above while rotating
armature slowly in growler. A shorted armature will causeblade to vibrate and be attracted to the core. Replace
shorted armature.
ARMATURE GROUNDING TESTCheck the insulation between the armature coil cores and
the commutator segments. They are normal if there is no
continuity.
ARMATURE COIL OPEN-CIRCUIT CHECK
Check for continuity between segments. The condition is nor-
mal if there is continuity.
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Downloaded from www.Manualslib.com manuals search engine 16-48ENGINE ELECTRICAL - lanition Svstem
\/27EL0086
/DEL0087INSPECTION
SPARK PLUGCheck the plug gap and replace if the limit is exceeded.
Standard value:
1.0-l .l mm (.039-.043 in.)
Limit: 1.3 mm
(.051 in.)
Caution
1.Do not attempt to adjust the gap of the platinum plug.
2.Cleaning of the platinum plug may damage the plati-num tip. Therefore, if carbon deposits must be re-
moved, use a plug cleaner and complete cleaning with-
in 20 seconds for protection of the electrode. Do not
use wire brushes.
SPARK PLUG CABLE(1) Check cap and coating for cracks.
(2) Measure resistance.Limit: Max. 22
ksZ
IGNITION POWER TRANSISTOR
NOTE
An analog-type circuit tester should be used.No. l-No. 4 coil side
(1)Connect the negative (-) terminal of the 1.5 V power supply
to terminal (4) of the ignition power transistor; then check
whether there is continuity between terminal (13) and termi-nal (4) when terminal (3) and the positive
(+) terminal
are connected and disconnected.NOTE
Connect the (-) probe of the circuit tester to terminal (13).
Terminal 3 and (+) terminal
ConnectedTerminal 13 and terminal 4
Continuity
IUnconnectedINo continuitv
(2)Replace the ignition power transistor if there is a malfunc-
tion.No. ~-NO. 5 coil side
(1)Connect the negative (-) terminal of the 1.5 V power supply
to terminal (4) of the ignition power transistor; then check
whether there is continuity between terminal (12) and termi-nal (4) when terminal (2) and the positive
(+) terminal
are connected and disconnected.
NOTE
Connect the (-)
probe of the circuit tester to terminal (12).
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Downloaded from www.Manualslib.com manuals search engine ENGINE ELECTRICAL b Ignition System16-49
27EL0089
Z7ELOOQO
1 Terminal 2 and (+) terminal/Terminal 12 and terminal 41
IConnectedIContinuitvI
IUnconnectedINo continuitvI
(2) Replace the ignition power transistor if there is a malfunc-
tion.No. ~-NO. 6 coil side
(1)Connect the negative (-) terminal of the 1.5 V power supply
to terminal (4) of the ignition power transistor; then check
whether there is continuity between terminal (11) and termi-nal (4) when terminal (1) and the positive
(+) terminal
are connected and disconnected.
NOTE
Connect the (-) probe of the circuit tester to terminal 11.
I Terminal 1 and (+) terminal/ Terminal 11 and terminal 41
-ConnectedIContinuityI
IUnconnectedINo continuityI
(2)Replace the ignition power transistor if there is a malfunc-
tion.
IGNITION COIL
Primary Coil Resistance
Measure the resistance between connector terminal (3) (pow-
er) and each coil terminal.Measuring point:
Coil A
(No.l-No.4 cylinder side coil) . . . . . . (2)-(3)Coil B (No.2-No.5 cylinder side coil) . . . . . .
(l)-(3)Coil C (No.3-No.6 cylinder side coil) . . . . . .
(4)-(3)Standard value: 0.67-0.81
Sz
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Secondary Coil Resistance
Measure the resistance between each coil high voltage termi-
nals.
Measuring point:Coil A (No. l-No. 4 cylinder side coil)
Coil B (No. ~-NO. 5 cylinder side coil)
Coil C (No. ~-NO. 6 cylinder side coil)
Standard value: 11.3-15.3
Wz

Downloaded from www.Manualslib.com manuals search engine 54-4CHASSIS ELECTRICAL - Battery
4. Clean top of battery with same solutions as described
in step (3).
5.Inspect battery case and cover for cracks. If cracks are
present, battery must be replaced.
6.Clean the battery post with a suitable battery post cleaning
tool.7. Clean the inside surfaces of the terminal clamps with a
suitable battery terminal cleaning tool. Replace damaged
or frayed cables and broken terminals clamps.8. Install the battery in vehicle.
9.Connect (+) and (-) cables to battery in the order of men-
tion.
10. Tighten the clamp nut securely.BATTERY
CHARGLNG
Caution
When batteries are being charged, an explosive gas forms
beneath the cover of each cell. Do not smoke near batteries
on charge or which have recently been charged. Do notbreak live circuits at the terminals of the batteries on
charge. A spark will occur where the live circuit is broken.
Keep all open flames away from the battery.
Battery electrolyte temperature may temporarily be allowed
to rise to 55°C (131°F). Increase of electrolyte temperature
above 55°C (131 OF) is harmful to the battery, causing deforma-tion of battery cell, decrease in life of battery, etc.
CHARGE RATE
If the test indicator is white, the battery should be charged
as outlined below.
When the dot appears or when maximum charge shown below
is reached, charging should be stopped.
NOTE
When the charging is performed at 5 amps, charging is virtually
100% three hours after the indicator’s indication changes from
white to green.
Use fast charging only in an emergency.
If the indicator does not turn to green even after the battery
is charged, the battery should be replaced; do not overcharge.
Charge Rate Chart
Batten/Slow Charging
Fast ChargingI
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Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Battery54-5BATTERY TESTING PROCEDURE
LTEST STEP
Clean terminals and clamps.
- Replace battery
(1) Remove hold-downs and shields.(2) Check for broken/cracked case or cover.
OK
NG- Replace battery
(1) Turn headlights on for 15 seconds.
NG(2) Turn headlights off for 2 minutes to allow battery voltage to- Charge battery at 5 amps.
stabilize.
(3) Disconnect cables.(4) Read open circuit voltage.
IOK: Open circuit voltage is more than
12.4V.Re-test(2) Load the battery at the recommended discharge rate (see
LOAD TEST RATE CHART) for 15 seconds.(3) Read voltage after 15 seconds, then remove load.
(4) Compare the measured value with the minimum voltage. (SeeOK: Higher than the minimum voltage
i
Normal
LL16 (60)
9.5
LOAD TEST RATE CHARTLoad test Cranking
Reserve
W-w)rating (0°F) capacity
Application
1 240 amps / 490 amps / 123 minutes 1 75D26R-MF 1
240 amps520 amps123 minutes 75D23R-MF
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Downloaded from www.Manualslib.com manuals search engine I,;CHASSIS ELECTRICAL
- Meters and Gauges54-27
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L:FUEL GAUGE SIMPLE CHECKTACHOMETER CHECK
(1)insert paper clip into the engine revolution speed detection
terminal provided in the engine compartment, and connectthe engine tachometer to the inserted paper clip.
Caution
As the tachometer is negative grounded, do not con-
nect battery conversely to prevent damaging transis-tor and diode.
NOTE
For tachometer inspection, use of a fluxmeter-type engine
tachometer is recommended. (Because a fluxmeter onlyneeds to be clipped to the high tension cable.)
(2) Connect the engine tachometer and compare the engine
tachometer and tachometer readings. Replace tachometer
if difference is excessive.
Standard value:1,000
f 100 rpm
3,000
+ 150 rpm
5,000
f 250 rpm
6,000
f 300 rpm
CautionThe engine speed signal output from the engine is
one-third of the actual speed. When the engine speed
is measured, make sure that the engine tachometeris placed in the
2-cylinder range. (The real speed is
indicated.)
Connect a test light to the harness con-nector.
Place the ignition switch in the ON posi-
tion.Check the test light and gauge conditions.
1 (1) Test light lights. (Pointer of gauge does not swing.)/-.-I Replace fuel gauge.
[ (2) Test light lights. (Pointer of gauge swings.)/-.--I Replace fuel gauge unit.1
1 (3) Test light does not light. (Pointer of gauge does not swing.)k-1 Correct harness.I
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