engine MITSUBISHI 3000GT 1991 Service Manual

Pre-removal and Post-installation Operationl Draining and Refilling of Engine Coolant(Refer to GROUP 00 - Maintenance Service.)
1. Engine coolant temperature switchHEATERS AND MANUAL AIR CONDITIONER
- Z!&E%Ltch55-39
ENGINE COOLANT TEMPERATURE SWITCH
M55xA- -
L
REMOVAL AND INSTALLATIONSealant: 3M Nut Locking Part No.
4171 or equivalent
BQQQQQ20A0199INSPECTION
MSSXCAAENGINE COOLANT TEMPERATURE SWITCH
(ALWAYS-
CLOSED TYPE CHECK)
(1) Immerse the engine coolant temperature switch in oil and
heat by a gas stove or similar method so as to increase the
oil temperature.(2) Check to be sure that the engine coolant temperature
switch is switched OFF when the oil temperature reaches
the standard value.Standard value: 112
- 118°C (233 - 244°F)
CautionUse engine oil for this test; stir it well while heating,
and do not heat more than necessary.
1 TSB Revision

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

55-62FULL AUTO AIR CONDITIONER
ICompressor. Condenser, Condenser Fan Motor, Refrigerant
- Line and Engine Coolant Temperature Switch / Other Parts
COMPRESSOR, CONDENSER, CONDENSER FAN MOTOR, RE-
FRIGERANT LINE AND ENGINE COOLANT TEMPERATURE SWITCH
M55TA-B4
The service procedures are the same as those for manual
air conditioner except for those parts described below on
turbocharged vehicles.5
Compressor, condenser and condenser fanmotor, refrigerant line removal steps
l *I. Air hose Bl +2. Air pipe
ii
Engine coolant temperature switch
removal steps
NOTETorque hose clamps to 4 Nm (2.9 ftlbs.).3. Air hose Al *4. Air intake hose A*a5. Air intake hose B
L
Air intake hose B
OSFOO23
Align7ment marks
Hose end: Paint mar
Pipe end:
Protrusron
OTHER PARTS
SERVICE POINTS OF INSTALLATIONM55iDAF
5.INSTALLATION OF AIR INTAKE HOSE B / 4. AIR INTAKE
HOSE AAlign the cutouts in air intake hose A indicated by arrows
with the n markings on air intake hoses B and C and inserthoses B and C all the way into hose A.
Insert the other end of air intake hose B all the way into
turbocharger side.2. INSTALLATION OF AIR PIPE
/ 1. AIR HOSE B
When installing the air hoses, make sure that the alignment
marks at places indicated by arrows are properly aligned.Insert each air hose until it hits the root of step or it
bottoms.
CautionBe careful not to allow any foreign matter to get into
the hoses, pipes, or the intercooler itself.M55WA-
-
Service procedures for other parts are the same as those in HEATERS AND MANUAL AIR CONDITIONER.
Part name
Ref. page
Heater Unit
P.55-22
Blower Motor AssemblyP.55-23
Evaporator - Removal and InstallationP.55-25Part name
Evaporator - Disassembly and Reassembly
Compressor
- Disassembly and Reassembly
VentilatorsRef. page
P.55-26
P.55-29
1 TSB RevisionHY009015-1132