battery MITSUBISHI 3000GT 1991 Service Manual

HEATERS AND MANUAL AIR CONDITIONER - Evaporator55-25
EVAPORATOR
M55RA- -
/REMOVAL AND INSTALLATION
9.0- 11 Nm
7.0 - 8.0 ftlbs.
i
O-ringRemoval steps
l *I, Connection of liquid pipe and suction hose
2. O-ring
3. Drain hose
4. Stopper
5. Glove box
6. Glove box outer case assembly
7. Under cover
8. Lower frame
9. A/C control unit
10. Evaporator
Pre-removal and Post-installation Operationl Discharge and Charging of Refrigerant
l Removal and lns~allation of Battery
SERVICE POINTS OF REMOVALM55RBAl
1.DISCONNECTION OF LIQUID PIPE AND SUCTION HOSEIf the hoses or pipes are disconnected, cap the hoses or
pipes with a blank plug to prevent entry of dust, dirt, and
water.
INSPECTIONM55RcADl Check for damage of the evaporator fin part.
l Check for damage or collapse of the drain hose.
l Check for peeling or cracking of the insulator.
FIN-THERM0 SENSOR AND AIR-INLET SENSOR CHECK
For information concerning the checking procedures, refer to
P.55-11.
iTSB Revision

55-28HEATERS AND MANUAL AIR CONDITIONER - Comtxessor
20F0067
SERVICE POINTS OF REMOVALM55SBAE1. REMOVAL OF COMPRESSOR DRIVE BELT
(1) Loosen bolt “A” for holding the tension pulley.
(2) Loosen bolt “B” for adjustment, and remove the
‘J
compressor drive belt.
3.REMOVAL OF SUCTION HOSE AND DISCHARGE HOSE
If the hoses are disconnected, cap the hoses with a blankplug to prevent entry of dust, dirt, and water.
5. REMOVAL OF COMPRESSOR
Caution
Lay the towel on the brake tube to protect them. When
install the compressor, do not damage the brake tubes.
This work must be done carefully so as not to spill the
compressor oil.
INSPECTIONM55SCAEl Checking for heat damage of the tension pulley.
l
Check for excessive play or deflection of the tension pulley.l Check for unusual wear of the tension pulley.
l Check for hardening of the air conditioner belt.
lCheck for unusual wear or abrasion of the air conditioner ,
belt.
\d’
OPERATION CHECK OF THE COMPRESSOR’S MAGNETIC
CLUTCH
(1) Connect terminal @ at the compressor side to the positive
(+) terminal of the battery, and ground the negative (-)terminal of the battery to the compressor.
(2) The condition of the compressor’s magnetic clutch can beconsidered satisfactory if the operation sound (a “click”
sound) of the magnetic clutch can be heard when this
check is made.
SERVICE POINTS OF INSTALLATIONM55SDAF5. INSTALLATION OF COMPRESSOR
If a new compressor is installed, first adjust the amount of
oil according to the procedures described below, and then
install the compressor.(1) Measure the amount (X cc) of oil within the removed
compressor.
(2) Wipe away (from the new compressor) the amount ofoil calculated according to the following formula, and
then install the new compressor.
New compressor oil amount
160 cc (9.8 cu.in.) - X cc= Y cc
NOTE
Y cc indicates the amount of oil in the refrigerant line,l/jthe condenser, the cooling unit, etc.
TSB Revision

55-34HEATERS AND MANUAL AIR CONDITIONER - :t%%: and Condenser8. REMOVAL OF CONDENSER
Move the radiator toward the engine, and then remove the
condenser upward.
d
INSPECTIONM55TCAKl Check the condenser fan for crushing or other damage.
l Check the condenser’s high-pressure hose and pipe in-
stallation parts for damage or deformation.
l Check the condenser fan shroud for damage.
CONDENSER FAN MOTOR CHECK
(1) Apply battery voltage to terminal @and ground terminal 8;at this time, check that the condenser fan motor turns.
(2) Apply battery voltage to terminal @and ground terminal 0;at this time, check that the condenser fan motor turns.
TSB Revision

FULL AUTO AIR CONDITIONER - Troubleshooting
CIRCUIT AND BENCH CHECK
i1 1. Inspection of air conditioner control unit power source circuit 1
,
L
lgniswii
C:
I:Q
6r------.
i
17
Ir~ B27 u
tion
tch 1(IG2)Junction block2:
E
28--6\
3
r-7\--7
LPower source 1I I
AYAir-conditioner control unit
2OFOO61
Troubleshooting Hintsl Air conditioner control unit terminal voltage
Terminal No.Signal nameConditionTerminal voltage
3Backup power sourceNormallyBattery voltage28, 36
Air conditioner control unitIgnition switch ONBattery voltage
power source
27, 35Air conditioner control unit
Normallyov
ground
1 TSB RevisionI

55-48FULL AUTO AIR CONDITIONER - Troubleshooting
[4. Inspection of water-temperature sensor and photo sensor circuits (
Air conditionercontrol panel
A
{ f*)- Potentiometer
‘>/b Damper drive
motor
\/\,9 Air conditioner
a 7 control unit
Water
temperature
sensor
m

Air conditionerEach sensorcontrol unit&
Air control panel
I.L .Solar radmtmnFin speed arlth-compensating ClrC”itmetIC ClrCUlt#t
A/D convertionND convemon
J2010043
I-
Troubleshooting Hintsl Air conditioner control unit terminal voltages
Terminal No.Signal nameConditionTerminal voltage
19Photo sensor 0llluminance 100,000 lux or more-0.1 to -0.2 v
llluminance less than 0 Iuxov
20Photo sensor 0Normallyov
9Water-temperature sensor 0Switch OFF [Engine coolant temperature
less than 50°C (122”F)]
Battery voltage
Switch ON [Engine coolant temperature
0 V
50°C (122°F) or higher]
1 TSB Revision

FULL AUTO AIR CONDITIONER - Troubleshooting55-495. Inspection of belt lock controller circuit
Compressor relay
tAir conditioner control unitAir conditioner
+control panelAir
condltloner,c.compressor commandAH condmonerarithmetic
circuitcompressor ONstgnal
ComparatorAir condltlonercompressor ON signal20 FOO58
Revolution pickup sensor
LiTroubleshooting Hintsl Air conditioner control unit terminal voltages
Terminal No.
Signal nameConditionTerminal voltage
11Air conditioner outputCompressor ONIO V to battery voltage
TSB Revision

FULL AUTO AIR CONDITIONER - Troubleshootina55-53r
---.__------
2OFOO8:
SELF-DIAGNOSIS CHECKING
Self-diagnosis checking is performed when there has been anautomatic cancellation, without cancel switch operation.
The following method can be used for checking the diagnosis.
Note that the diagnosis check connector is located under the
driver’s side instrument panel.When multi-use tester is used
(1) Read and record the self-diagnosis outputs.
(2) Repair the faulty spots by referring to diagnosis chart.
(3) Erase the failure code.(4) Check the system again.
When voltmeter is used
(1) Connect an analog voltmeter across the self-diagnosis
output terminal @ and ground terminal @ of the diagnosis
connector.(2) Turn ON the ignition switch.
(3) According to the voltmeter pointer deflection, read the
self-diagnosis pattern.(4) Referring to the diagnosis chart, repair the faulty spot.
(5) Erase the failure code by the following procedure.
@ Turn OFF the ignition switch.
@ Disconnect the battery cable from a battery terminal
and leave it disconnected for 10 seconds or more; then,
reconnect the cable.
@ Turn ON the ignition switch and read the self-diagnosiscode to check that the correct code is being output.
1 TSB Revision

FULL AUTO AIR CONDITIONER -Damper Control Motor Assembly55-59
II
INSPECTIONINSPECTION OF INSIDE/OUTSIDE-AIR DAMPER MOTOR
ASSEMBLY
Check that the motor rotates when battery voltage is applied tothe connector on the motor assembly side.
Check also that the motor rotates in the backward direction
when polarity is changed.
Caution1. Cut off the voltage when the damper is in the RECIR-
CULATION or FRESH position.2. Cut off the voltage if the motor does not turn when
battery voltage is applied.
INSPECTION OF AIR MIX DAMPER MOTOR
Check that the motor rotates when battery voltage is applied
across terminals
@ and @ of motor assembly side connector.
Check also that the motor turns in the backward direction when
polarity is changed.
Caution1. Cut off the voltage when the damper is in the MAX.
HOT or MAX. COOL position.
2. Cut off the voltage if the motor does not turn when
battery voltage is applied.
INSPECTION OF AIR MIX DAMPER POTENTIOMETER
Connect a circuit tester across terminals @ and @of the motorassembly connector and check that resistance gradually
changes as the damper is moved from MAX. HOT to MAX.
COOL position.
Standard valueMAX. HOT: Approx. 0.2
klRMAX. COOL: Approx. 4.9
kR
INSPECTION OF OUTLET SELECTOR DAMPER MOTORCheck that the motor turns when battery voltage is applied
across terminals @ and @ of the motor assembly connector.
Check also that the motor turns in the backward direction when
polarity is changed.
Caution
1.Cut off the voltage when the damper is in the DEF. or
FACE position.2. Cut off the voltage if the motor does not turn when
battery voltage is applied.
INSPECTION OF OUTLET SELECTOR DAMPER POTENTIO-
METER
Connect a circuit tester across terminals @and @of the motorassembly connector and check that resistance gradually
changes as the damper is moved from DEF. to FACE position.
Standard valueDEF. position: Approx. 2.0
kRFACE position: Approx. 4.3 kfl
TSB Revision