sensor MITSUBISHI DIAMANTE 1900 Workshop Manual

EMISSIONS AND ELECTRONIC CONTROL COMPONENT LOCATIONS-l .8L ENGINE
1. Mass Air Flow (MAF) sensor w/integrated Intake Air Temperature (IAT) sensor 6. Throttle Position (TP) sensor
2. Engine Coolant Temperature (ECT) sensor 7. Manifold Absolute Pressure (MAP) sensor
3. Camshaft Position (CMP) sensor 8. Evaporative emissions purge solenoid
4. Exhaust Gas Recirculation (EGR) valve 9. Positive Crankcase Ventilation (PCV) valve
5. Idle Air Control (IAC) valve (located on underside of throttle body) 10. EGR control solenoid

EMISSIONS AND ELECTRONIC CONTROL COMPONENT LOCATIONS-2.4L ENGINE
1. Crankshaft Position (CKP) sensor
7. Evaporative emissions purge solenoid
2. Positive Crankcase Ventilation (PCV) valve
8. Mass Air Flow (MAF) sensor w/integrated Intake Air Temperature (IAT) sensor
3. Manifold Absolute Pressure (MAP) sensor
9. Idle Air Control (IAC) valve (located on underside of throttle body)
4. Exhaust Gas Recirculation (EGR) solenoid
10. Camshaft Position (CMP) sensor (located inside distributor)
5. Throttle Position (TP) sensor
~11. Engine Coolant Temperature (ECT) sensor
6. Exhaust Gas Recirculation (EGR) valve (located on underside of throttle body)
12. EVAP canister (located under fender)

.
4-18 DRIVEABILITYAND EMISSIONS CONTROLS
Name ; Symbol Name j Symbol
I
Arr conditioning compressor clutch relay ; N Heated oxygen sensor (Rear)
j ”
Air condrtioning swatch , s 1 Idle air control motor
/ F
/
Check engrne/Malfunction Indicator lamp
/ Q lgnrtion trmrng adjustment connector
j D
Crankshaft position sensor / M Injector
! O
Data link connector
j p Intake air temperature sensor / K
Distributor (wrth bulk-in camshaft position sensor, , B Manifold absolute pressure sensor
ignition coil and rgnrtron power transistor) I 1 H
Multrport fuel in]ectron (MFI) relay
i T
EGR solenord
i J PaWNeutral positron switch j A
Engine control module
I u I Power steering pressure switch
Engine coolant temperature sensor c / Throttle position sensor
Evaporative emission purge solenoid
I I I (with burl&In closed throttle position switch) / L _
/ G
I
I
- Fuel pump check terminal /
I j E i Vehicle speed sensor (reed switch)
/ R
Heated oxygen sensor (Front)
I w I
i -
Ilectronic engine control component locations-l 51 engine 93154go1

DRIVEABILITYAND EMISSIONS CONTROLS 4-19
Name
Air conditroner relay
Air condrtroner switch
Air flow sensor (rncorporatrng Intake arr temper-
ature sensor and barometric pressure sensor) Symbol Name
Symbol
0 ignition cot1 (power transrstor)
M
H lgnrtion trmtng adjustment terminal
R
A Inhibitor switch
V
Crank angle sensor and top dead center sensor
E Injector K
1 EGR control solenord valve
1 Q 1 MPI control relay
1 N 1
EGR temperature sensor
Engine control unit
Engine coolant temperature sensor
I Fuel pump check terminal J Oxygen sensor F
U Power steering 011 pressure switch I
0 Purge control solenord valve
P
1 T I Self-dragnosis terminal
I s I
I idle posrtron swatch
1 D 1 Throttle positron sensor I c I
Idle speed control servo (stepper motor)
L Vehicle speed sensor (reed swatch)
G
ilectronic engine control component lochions- .6L enuine 93154go;

4-20 , DRIVEABILITYAND EMISSIONS CONTROLS
Name Symbol Name Symbol
Air conditioning compressor clutch relay J Ignition coil (ignition power transistor) F
Air conditlonrng switch 0 Ignition trming adjustment terminal R
Crankshaft positron sensor and camshaft posi- Injector I
tion sensor G
~ Multiport fuel injection relay N
Data link connector s ’
- Oxygen sensor A
EGR solenoid K
~ Park/neutral positron switch M
EGR temperature sensor L
_ Power steering pressure switch
U
Engine control module Q
~ Throttle position sensor
D
Engrne coolant temperature sensor E
Vehicle speed sensor (reed switch) P
Evaporative emrsslon purge solenoid H -
Volume air flow sensor (incorporating intake
Fuel pump check terminal T arr temperature sensor and barometric pres- B
- sure sensor)
Idle speed control motor (closed throttle POW
tron swatch, tdle speed control motor positron
sensor)
! c
93154go: Electronic engine control component locations-2.01 SOHC engine

DRIVEABILITYAND EMISSIONS CONTROLS 4-21
Heated oxygen sensor
c
NOTE
The “Name” column is arranged in alphabetical order.
ilectronic engine control component locations-2.01 DOHC engine

4-22 DRIVEABILITYAND EMISSIONS CONTROLS
Name Symbol
Name Symbol
I
Arr condrttontng compressor clutch relay
P lgnrtton trmrng adjustrng terminal
H
Air condrbonrng swrtch
S Idle arr control motor (stepper motor)
B
Camshaft posrtron sensor and crankshaft posrtron
Injector
N
sensor L
~ Knock sensor
Check engrne/malfunctton rndtcator lamp I
R -
I D~agnostrc output termtnal and dtagnostrc test F- Mujttport fuel qector (MFI) relay _
T
mode control termrnal U
Park/neutral oosrtron swatch
Q
EGR solenoid I
1995 models> F
Power steering pressure swatch M
I
EGR temperature sensor Federal from 1995 models> E
Throttle posrtlon sensor fwrth burlt-In closed throttle
, swrtch)
Engrne control module
Engine coolant temperature sensor
Evaporatrve emrssron purge solenord T
0 Variable tnductton control motor (DC motor) (wrth
burlt-tn rnductron control valve posrtron sensor) J
C Vehrcle speed sensor (reed swatch) R
Heated oxygen sensor
Ignition cot1 (ionrtron Dower transistor) G
Volume arr flow sensor (with burlt-In Intake arr
K temperature sensor and barometric pressure sensor)
I I A
ilectronic engine control component locations-3.01 SOHC engine 93154go7

.
4-24 DRIVEABILITYAND EMISSIONS CONTROLS
Name
Air conditioning compressor clutch relay
Air conditioner switch
Camshaft position sensor
Check engine/malfunction indicator lamp
Crankshaft position sensor
Data link connector
EGR solenoid
Engine control module
Engine coolant temperature sensor
Evaporative emission purge solenoid
Fuel pump check terminal
Heated oxygen sensor (Front) Symbol 1 Name
Symbol
L 1 Heated oxygen sensor (Rear)
C
T / Idle arr control motor
H
I ignition coil (Ignition power transistor)
R
S Injector
N
M Manifold differential pressure sensor
F
U Multiport fuel injection (MFI) relay/Fuel pump V
relay
E Park/Neutral position switch
Q,
W Power steering pressure switch
A
0 Throttle position sensor (with built-in closed
G
throttle position switch)
D Vehicle speed sensor
P
J Volume air flow sensor (with built-in intake air
temperature sensor and barometric pressure
B K
sensor)
ilectronic engine control component locations-3.51 engine

DRIVEABILITYAND EMISSIONS CONTROLS 4-25
NAME
SYMBOL NAME SYMBOL
Air conditioning compressor clutch relay K
Knock sensor D
I Crankshaft position sensor
A Left bank heated oxygen sensor (front) iforniaz
I I
Data link connector T Left bank heated oxygen sensor (rear) fornia>
I Distributor (built-in camshaft position
I J Manifold differential pressure sensor
I F
sensor and ignition coil)
I
EGR solenoid . B Multiport fuel injection (MFI) relay/fuel pump K
relay
1 Engine coolant temperature sensor
IQ 1 Park/neutral position switch IR
Euaporatiue.emission purge solenoid B
Powertraincontrol module LJ
l Evaporatiw5+eiiission ventilation solenoid Y
I Powersteering pressure switch
L
Fan controller 0 Right bank heated oxygen sensor (front) C

Fuel tank differential pressure sensor V Right bank heated oxygen sensor (rear) E

Heated oxygen sensor (front) W Throttle position sensor H
I
1 Heated oxygen sensor (rear) I X 1 Vehicle speed sensor
Ip I
Idle air control motor
Injector I
G Volume air flow sensor (with built-in intake air S
temperature sensor and barometric pressure
sensor)
I I
93154@3 lectronic engine control component locations-199940 Galant with the 3.OL SOHC engine

4-26 DRIVEABILITYAND EMISSIONS CONTROLS
The Powertrain Control Module (PCM) monitors
the signals of input and output sensors, some all the
time and others at certain times and processes each
signal. When the PCM notices that an irregularity has
continued for a specified time or longer from when
the irregular signal was initially monitored, the PCM
judges that a malfunction has occurred and will
memorize the malfunction code. The code is then
stored in the memory of the PCM and is accessible
through the data link (diagnostic connector) with the
use of an electronic scan tool or a voltmeter.
CHECK ENGINE/MALFUNCTION
INDICATOR LIGHT
Among the on-board diagnostic items, a check
engine/malfunction indicator light comes on to notify
the driver of a emission control component irregular-
ity. If the irregularity detected returns to normal or the
PCM judges that the component has returned to nor-
mal, the check engine/malfunction indicator light will
be turned off Moreover, if the ignition is turned OFF
and then the engine is restarted, the check
engine/malfunction indicator light will not be turned
on unttl a malfunction is detected.
The check engine/malfunction indicator light will
come on immediately after the ignition switch is
turned ON. The light should stay lit for 5 seconds
and then will go off. This Indicates that the check en-
gine/malfunction indicator lamp is operating nor-
mally. This does not signify a problem with the sys-
tem.
*The check engine/malfunction indicator
lamp will come on when the terminal for the
ignition timing adjustment is shorted to
ground. Therefore, it is not abnormal that the
light comes on even when the terminal for ig-
nition timing is shorted at time of ignition
timing adjustment.
To test the light, perform the following:
1. Turn the ignition switch ON. Inspect the check
engine/malfunction indicator lamp for Illumination.
2. The light should be lit for 5 seconds and then
should go out.
3. If the lamp does not illuminate, check for open
circuit In the harness, blown fuse or blown bulb.
SERVICE PRECAUTIONS
l Before attachrng or detaching the PCM harness
connectors, make sure the ignition switch is OFF and
the negative battery cable is disconnected to avoid
the possibility of damage to the PCM.
l When performing PCM input/output signal di-
agnosis, remove the pin terminal retainer from the
connectors to make it easier to insert tester probes
into the connector.
l When attaching or detaching pin connectors ,
from the PCM, take care not to bend or break any pin
terminals. Check that there are no bends or breaks on
PCM pin terminals before attempting any connec-
tions.
l Before replacing any PCM, perform the PCM
input/output signal diagnosis to make sure the PCM
is functioning properly.
l When measuring supply voltage of PCM-con-
trolled components with a circuit tester, separate 1
tester probe from another. If the 2 tester probes acci-
dentally make contact with each other during mea-
surement, a short circuit WIII result and damage the
PCM.
# See Figures 83
and 84
Remember that the diagnostic trouble code identi-
fication refers only to the circuit, not necessarily to a
specific component. For example, fault code 14 may
indicate an error in the throttle position sensor cir-
cuit; it does not necessarily mean the TPS sensor has
failed Testing of all related wiring, connectors and
the sensor itself may be required to locate the prob-
lem.
The PCM memory is capable of storing multiple
codes. During diagnosis the codes will be transmlt-
ted in numerical order from lowest to highest, regard-
less of the order of occurrence. If multiple codes are
stored, always begin diagnostic work with the lowest
numbered code
Make a note of the following:
1. When battery voltage IS low, no detection of
failure is possible. Be sure to check the battery volt-
age and other conditions before starting the test.
2. Diagnostic items are erased if the battery or the
engine controller connection is detached. Do not dis- connect either of these components until the diag-
nostic material present in the PCM has been read
completely.
3. Be sure to attach and detach the scan tool to
the data link connector with the ignition key OFF. If
the scan tool in connected or disconnected with the
ignition key ON, diagnostic trouble codes may be
falsely stored and the engine warning light may be il-
luminated. WITHASCANTOOL
) See Figures 85 and 86
The procedure listed below is to be used only as a
guide, when using Mitsubishi’s MUT-II, or equivalent
scan tool. For specific operating instructions, follow
the directions supplied with the particular scan tool
bemg used.
1. Remove the underdash cover, if equipped. At-
tach the scan tool to the data link connector, located
on the left underside of the instrument panel.
2. Using the scan tool, read and record the on-
board diagnostic output.
3. Diagnose and repair the faulty components as
required
4. Turn the ignition switch OFF and then turn it
ON.
5. Erase the diagnostic trouble code.
6 Recheck the diaanostic trouble code and make
sure that the normal &de is output.
79232G37 89574g98 Fig. 83 Diagnosis terminal connector loca-
tion-Galant Fig. 85 The data link connector is located
on the left under side of the instrumeni
panel
,--MU DL4GNDSl.S
LGRDIJND
79232638
Fig. 84 Diagnostic connector Iocation-Mi-
‘age
ata link connector
89574994 Fig. 86 Proper connection of the scan tool to read codes on OBD-I vehicles