battery MITSUBISHI 3000GT 1991 Manual PDF

SERVICE BRAKES -Anti-lock Braking System Troubleshooting35-37
DABS warning light blinks once after the ignition key is turned to the “ON” position. It
Lilluminates in the “START” position and blinks once again when turned to the “ON” position.
[Explanation]
1 sec. while itharness between the ECU and the warning light, the
light illuminates only when the valve relay is off in
performs a valve relay test. If there is a break in the
the valve relay test, etc.
IGNITIONSWITCH(IG1)I
J/B
F
2
r+im
md
/
L/
COMBINATION
METER
ABS-ECU-____
KK35-KK-It3503In the ignition key “ON”
position, does voltage
between terminal No. 25 and
ground indicate battery
voltage?ABS warninglight and
Yes
Repair harness.
vMalfunction of ABS ECU
+ Replace ABS ECU.
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35-40SERVICE BRAKES -Anti-lock Braking System Troubleshooting
E-3When diagnosis code “21 G SNSR.” is displayed
[Explanation]
The ABS-ECU outputs this trouble code in the
following cases.
l G sensor OFF trouble (It is judged that the G
sensor continues to be OFF for more than
approximately 13 seconds except when thevehicle is stopped or when there is stop light
switch input.)
lWhen there is a broken wire or short circuit in
the harness for the G sensor system.
FUSIBLE LINK@
4
pilGGRq;
I4
Bd
pEmg=1
--a
2
__1
It
I,1II1 Ii II II II Ii II II I/ II ;/ II II II II !: II//IIII/.--A
X35-LK-R9505
I
IiNo IfIs G sensor normal? (Refer
to
P.35-92.)Replace G sensor.
I
Yes
Remove the ABS-ECU
connector and check at
the harness connector.
With the ignition key “ON”,
does the voltage between
terminal No. 6 and groundindicate battery voltage?
Repair harness.
”
ABS-ECU malfunctionIJP Replace ABS-ECU.
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SERVICE BRAKES -Anti-lock Braking System Troubleshooting35-41E-4 When diagnosis code“22 STOP LAMP SW” is displayed
ii’ [Explanation][Hint]
The ABS-ECU outputs this trouble code in theIf the stop light operates normal, the harness for the
following cases.stop light switch input circuit is broken or there is a
lStop light switch remains on for more than 15malfunction in the ABS-ECU.
minutes while the ABS is not functioning.
lThe harness wire for the stop light switch may
be open.
L
FUSIBLE,LINK@
J/B
0
I
I
ABS-ECU29
j 1 ) 2 13 14) 5 / 6 17 / 9 j 9 ~10~11~12~13(14~15(161171~9~~'9~0l21~2~3l9~~~6~~~9~~0l31l321U13l35l
KX35-AK-33306
F Check the stop light related
go out
normally?circuit and repair problem
spots.
When the brake pedal is pressed
between connector terminal No.
29 and ground indicate battery
I1 voltage! , Yes /Repair harness.
Is the voltage between No.
1terminal and ground equal to the
battery voltage when measured
wrth resistor connector discon-
nected?
YesRepair harness.
6NoIs resistor resistance 780 to
860 sl?) Replace resistor.
YesIs there continuity between No. 2
FpylReplace ABS-ECU.
visionI

SERVICE. BRAKES -Anti-lock Braking System Troubleshooting35-43
E-6When diagnosis code “51 VALVE RELAY” is displayed
I
L[Explanation]
When the ignition switch is turned ON, the ABS
normal. In addition, normally it monitors whether or
ECU switches the valve relay OFF and ON for annot there is power in the valve power monitor line
initial check, compares the voltage of the signal tosince the valve relay is normally ON. If the supply of
the valve relay and valve power monitor line voltagepower to the valve power monitor line is inter-
to check whether the valve relay operation is
rupted, this trouble code will be output.
b
L
IGNlTIONSWITCH(IG1)
-I--
iz
=pi7TEaq
dI
6
7
Ed
COMBINATION
METER
--;Gm1 I 11
I /I
--- --
710 4Ii+
mI%
~d10 2
--- -- -?
ii3Dz62 27
iE b
1112j31a15(6/71618/10(11112113/14/15j16/17(18118~20~21~2~3~4~5~~~2@~~~0~31~2~3~~~35
KX35-AK-K3503
r-TSB I
( ;;reove;d ch; the>
4.IWhen the valve relay is checked,
are the following conditions
found?
No. 85
- No. 86: Resrstance
value 60 - 120 IINo. 30-No. 87a: Continuity
No. 30 - No. 87: No continuity
When batterv voltaoe IS aooliedbetween terminalsho. 86 and
No. 85.
No. 30
- No. 87: Contrnurty
No. 30 - No. 87a: No continurtyNo
I1-----+Valve relay malfunction
+l
IReplace valve relay.I
Yes
&I/ No1IWith the ignition key “ON”,
does the voltage between the
connector terminal No. 52 and
ground indicate battery voltage?
Yes
Connect the HU harness and
\ remove the ECU connector.
+II NnrIground Indicate battery voltage.
Replace ABS
ECIJ.
vision

35-44SERVICE BRAKES -Anti-lock Braking System Troubleshooting
E-7When diagnosis code “52 MOTOR RELAY” is displayed
[Explanation]
The ABS ECU outputs this trouble code for the
motor relay and motor in the following cases.
l When the motor relay does not function
lWhen there is trouble with the motor itself and it
does not revolve
lWhen the motor ground is disconnected and the
motor does not revolve
l When the motor continues to revolve
[Hint]
If there is motor operation noise during MUT forced
drive mode, there is a broken or short circuited
motor monitor wire.
FUSIBLE LINKa
=
::
s* m’ IL% Q7
plGizq”+-103 1
----..-___I _-
3%ECU2526L--h h
Th v-sTIII
14 ’
+---I
i”
’-ll21314 15 16 17 16 ~8~10)11~12~13~14~15~16~17~16~li1Q~0~1~~23~4~*6~2?~E~Q~30~1~2~33~~~5J
X35-AK-R3500during MUT forced drive mode?
Remove the motor relay.
I
1 ;;pa4r&&rness between 1
5Remove the motor relay and
check resistance values.
No. 85
- No. 86: Resistance
value 30 - 60 fiNo. 30 - No. 87: No continuity
Battery voltage is applied
kotw8esfn terminals No. 85 and
No. 30
- No. 87: ContinuityReplace motor relay.
1Yes
L
+I, NoIIIs pump motor ground connected
normally?Connect ground wire.
I
YesInstall motor relay and remove
HU connector.
@Vyiground indicate battery voltage?
I Yes
IConnect the HU connector
and remove the ECU connectorRepair harness.
J- No
Is resistance between bodyP Malfunction of harness
connector terminal No. 2
Lrbetween HU and ECU
and No. 26 30 - 60 a?
ItNc-11 I<
r 1 Repair harness.;~~:;$$a$?%dABS ECU malfunction
> Replace ABS ECU.
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When energized
Between terminals 4 and 5Continuity
When de-energized
Between terminals 4 and 5\i fl \\ 16FO264No continuity
Between terminals 1 and 3Continuity
16FO122L--J18FOCII
SERVICE BRAKES - Service Adjustment ProceduresI
INSPECTION OF POWER RELAYM35FOAP
7
1.Remove the relay box cover in the engine compartment and
remove the power relay.
2. Apply the battery voltage to the terminal @ and check for
‘L-J1
continuity between the following terminals when the
terminal @ is short-circuited to ground.
35-62
14FOOS14FOO8
l-TSB
1
REMEDY IN CASE OF DISCHARGED BATTERY
M35FOAQIf the engine is jump-started, because of a completely
discharged battery, the vehicle may suffer misfiring and fail to
start if an attempt is made to start without allowing the battery
to recover sufficiently. This is because the ABS consumes a
great deal of current for its self check. In such a case, allow the
battery to sufficiently charge or remove the ABS power relay in
the engine compartment to disable the ABS. Removing the
ABS causes the ABS warning light to light. After the battery is
charged sufficiently, install the power relay and restart the
engine to check that the ABS warning light goes out.
INSPECTION OF VALVE RELAY AND MOTOR
RELAY (ABS)M35FOAR1. Remove the splash shield
(FR) and remove the relay box
cover by inserting a screwdriver between the hydraulic unit
and cover to pry off the lock.
2.Remove the relays. The one closest to you (larger one) is
the motor relay and the one farthest from you (smaller one)
is the valve relay.
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wision

37A-14
STEERING - Steering Wheel and Shaft
13R0654
SERVICE POINTS OF REMOVALM37GBAV1. REMOVAL OF AIR BAG MODULE
(1) Remove the air bag module mounting nut using a
socket wrench from the back side.
(2) To remove the clock spring connector (squib connector)
from the air bag module, force the lock outward and pry
it with a standard screwdriver, as shown in the
illustration at the left, to make sure that no undue force
is exerted to the connector when it is removed.
CautionWait at least 30 seconds after disconnecting the
battery cable before doing any further work. The
SRS system is designed to retain enough voltage todeploy the air bag for a short time even after the
battery has been disconnected, so serious injury
may result from unintended air bag deployment if
work is done on the SRS system immediately afterthe battery cable is disconnected.
(3) The removed air bag module should be stored in a
clean, dry place with the pad cover face up.
2. REMOVAL OF STEERING WHEEL
Remove the steering wheel by using a steering wheel
puller.
CautionDo not hammer on the steering wheel to remove it;
doing so may damage the collapsible mechanism.
SERVICE POINT OF INSTALLATIONM37GDAR2. INSTALLATION OF STEERING WHEEL
Line up the “NEUTRAL” mark of the clock spring with the
mating mark before installing the steering wheel.
CautionIf the clock spring’s mating mark is not properly
aligned, the steering wheel may not be completely
rotational during a turn, or the flat cable within the
clock spring may be severed, obstructing normal
operation of the SRS and possibly leading to serious
injury to the vehicle’s driver.1
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BODY - Power Window
L/CHECKING INDIVIDUAL PART AND CIRCUIT
1. ETACS POWER-SUPPLY AND GROUND CIRCUITSBattery
Junction block
Jumper connector
ETACS unrt(ECU)
*I : Vehicles without theft-alarm system
“2: Vehicles with theft-alarm system
T16FO314Description of operation
The battery supplies a stabilized 5V power supply to the electronic control unit, via the constant-voltage circuit
and terminal (51) directly connected to the battery. If there is an abnormal condition of the power-supply
circuit, other ETACS functions also will not operate.
Electronic control unit terminal voltage (Connection status of electronic control unit connector)
ECU terminal No. SignalConditionTerminal
voltage
51Electronic control unit power supplyAt all timesSystem
voltage
Checking the ground circuit (Disconnect the connector and check the wiring harness side.)
/I1I1ITerminal No.Connected to/measured part
MeasurementTester
connectionCheck conditionsStandard
57”’Electronic control unit groundResistance57*‘-groundAt all timesContinuity59”?59*‘-ground
NOTE
“I : Vehicles without theft-alarm system
“2: Vehicles with theft-alarm system
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I

42-46BODY - Power Window
2.IGNITION SWITCH INPUT CIRCUITS
BatteryFusible link
20B-Y. ;I II II I ] II ,;rLL30A,l ‘\m 1 2 34 5 6
25
3:6Pz
z03I
=7\-7
Junction block@ (Multi-purpose fuse)
1
ETACS unit(ECU)
4,
m“1 : Vehicles without theft-alarm system“2: Vehicles with theft-alarm system16FO312Description of operation
A condition for operation of this system is the sending of HIGH-level signals to the electronic control unit
when the ignition switch is switched to the “ON” position.
Electronic control unit terminal voltage (Disconnect the connector of the electronic control unit and
check the wiring harness side.)
ECU terminal No. Signal
52Ignition switch: “ON”ConditionIgnition switchOFF
ON
Standardov
System
voltageChecking the individual part
Ignition switch: Refer to GROUP 54
- Ignition Switch.
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42-48BODY - Power Window
Description of operation
When the ignition switch is switched to the “ON” position, and also for a period of 30 seconds after the
ignition switch is switched to the “OFF” position, the transistor of the electronic control unit is switched ON,
and battery voltage is supplied from the battery (through fusible link No. 9) to the power window relay.
In addition, voltage is supplied (through fusible link No. 9) to power window switch and motor as a result of
the switch-ON of the power window relay.
NOTETurn the ignition switch from ON to OFF, and power will be supplied to the power window relay for 30
seconds. However, power supply will be stopped if the door is opened during this period.
Electronic control unit terminal voltage (Disconnect the connector of the electronic control unit and
check the wiring harness side.)
ECU terminal No. Signal
ConditionTerminalvoltage
5*I
7*2Power window relay signalAt all timesSystem
voltageP
NOTE*I : Vehicles without theft-alarm system
“2: Vehicles with theft-alarm systemChecking the individual part
Power window relay: Refer to
P.42-51.
1 TSB Revision
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