1900 MITSUBISHI DIAMANTE display

remote control spark plugs catalytic converter height adjustment fuse box oil

Page 148 of 408

MITSUBISHI DIAMANTE 1900 Repair Manual ,
DRIVEABILITYAND EMISSIONS CONTROLS 4-5
Fig. 16 Remove the canister retaining bolts
and remove the canister
Solenoid Valves
u See Figures 17 and 18
1 b Disconnect the negative battery cable.
2

,
DRIVEABILITYAND EMISSIONS CONTROLS 4-5
Fig. 16 Remove the canister retaining bolts
and remove the canister
Solenoid Valves
u See Figures 17 and 18
1 b Disconnect the negative battery cable.
2. Label and remove the vacuum and electrical
harness connections from the purge control solenoid.
3. Remove the solenoid and mounting bracket
from the engine compartment.
4. Installation is the reverse of the removal proce-
dure.
I
- EVAPORATIVE EMISSION
Fig. 18 location of the evaporative emis-
purge solenoid-1990-93 2.OL DDHC
Volume air flow seneftr I
I Manifold diierential pressure m

&a$34
Fig. 19 Typical EGR system schematie-2.4L engine shown, others similar
IPERATION uum ports; pick one and plug the other. The vacuum
must be retained.
1 See Figure 19
The Exhaust Gas Recirculation (EM) system is
lesigned to reintroduce exhaust gas into the com-
ttii valve.
rustion chambers, thereby lowering combustion b. With 8.5 in. Hg (28.7 kPa) of vacuum or
emperatures and reducing the formation of Oxides of more applied to the valve, air should pass 4. For 1990-93 vehicles. blow air from 1 oas-
sage of the EGR to check condition as foffows--
a. With 1.8 in. Hg (6 kPa) of vacuum or less
aoolied to the valve. air should not oass throuah
litrogen (NO,).
The amount of exhaust gas that is reintroduced
Ito the combustion cycle is determined by several
actors, such as: engine speed, engine vacuum, ex-
raust system backpressure, coolant temperature,
Irottle position. All EGR valves are vacuum oper-
ted. The EGR vacuum diagram for your particular
chicle is displayed on the Vehicle Emission Control
iformation (VECI) label. through the valve.
5. For 1994-00 vehicles, apply vacuum (speci-
fied below) and check the passage of air by blowing
through either side of the EGR passages, as follows:
a. With 1 .?I in. Hg or less of vacuum applied
to the valve, air should blow out of the opposite
passa e.
b. %ith 8.7 in. Hg or more of vacuum applies
to the valve, air should not blow out of the oppo-
:OMPONENTTESTiNG site passage.
6. If the results are not as described, replace the
EGR valve.
iGR Valve
t See Figure 20
1. Remove the EGR valve from the vehicle. Check
I”..““.
:or sticking of plunger caused by excess carbon de-
losits. If such a condition exists, clean with appro- EGR Temperature Lan*nr
u See Figure 21
The EGR temperature sensor is used on California
vehicles only. The EGR temperature sensor detects
Fig. 20 Use a vacuum pump to test the EGR
I I
a coni tance i of water. then measure resis-
I ms the water temperature is increased

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MITSUBISHI DIAMANTE 1900 Repair Manual DRIVEABILITYAND EMlSSlONSCONTROiS 4-15
it into a pulse signal. The PCM receiv
es this signal
and then computes the engine speed ad controls the
fuel injector timing and ignition timing based on th

DRIVEABILITYAND EMlSSlONSCONTROiS 4-15
it into a pulse signal. The PCM receiv
es this signal
and then computes the engine speed ad controls the
fuel injector timing and ignition timing based on this
input.
TESTING
This sensor produces a pulse signal based on in-
formation gathered while the engine is running. Test-
ing the CKP sensor requires several special tools that
are very expensive to purchase. Due to this fact, we at
Chilton have determined testing this sensor to be be-
yond the scope of the do-it-yourself mechanic. The
sensor can be monitored with an appropriate scan
tool using a data display or other data stream infor-
mation Follow the instructions included with the
scan tool for information on accessing the data.
REMOVAL<jSTALLATlON
2.OL SDHC and 1990-96 1.5L Engines are built
89574ga3 into the
9 See Figure 79
The CKP sensor on these engines is located in the
distributor. Refer to the distributor removal and in-
stallation procedure in Section 2.
1.6L and 2.OL DDHC Engines
b See Figure 80
1. Disconnect the negative battery cable.
2. Detach the electrical throttle body stay.
3. Remove the sensor retaining screws,
4. Remove the sensor assembly from the engine.
To install:
5. Install the sensor in the openina in the enaine
and tighten the sensor retaining’screvk -
6. Install the throttle body stay,
7. Attach the electrical connector to the sensor.
8. Connect the negative battery cable.
1.8L, 2.4L, 3.OL (SOHC and DOHC), 3.5L,
and 1997-00 1.5L Engines
b See Figures 81 and 82
1. Disconnect the negative battery cable.
2. Remove the timing belt, as outlined in Section
3 of this manual.
3. Unplug the sensor connector.
4. Unfasten the retaining bolts, then remove the
sensor from the vehicle.
5. Installation is the reverse of the removal proce-
dure. ’ Fig. 81 Remove the two CKP sensor retain-
Fig. 82 Remove the sensor and slide the re-
1 / gfne shown, others similar ’ -1 ing bolts-2 4L engine shown others sim-
ilar . ’ luctor wheel off of the crankshaft-2 4L en

Page 362 of 408

MITSUBISHI DIAMANTE 1900 Repair Manual Diagnostic InspeclM item
trouble
code no. Detection
conditions
11 Front right wheel speed sensor
12 Front left wheel speed sensor
13 Rear right wheel speed sensor Open circuit
6 c
14
Rear lef

drain bolt adding oil instrument cluster turn signal jack points check engine