1990 MITSUBISHI SPYDER differential

ENGINE (TURBO)
AND ENGINE> General lnformaiton
Engine>
Heated oxygen sensor Power supply(front)l Vehicle speed sensor Volume air flow sensor l switch Intake air temperature Park/neutral positionsensorswitch Throttle position sensor Power steering pressure Closed throttle positionswitch
switchl Ignition switch ST Camshaft position sensor Crankshaft position sen-sor Barometric pressure sen-sor Engine coolant tempera-
ture sensor
valve position sensor Heated oxygen sensor(rear) Manifold differential pres-sure sensor tank differential pres-
sure sensor
,
Engine control Injector l
Fuel pump relay Evaporative emission lFuel pump relay purge solenoid air control motor injection EGR solenoid relay Evaporative emission l ventilation solenoid clutch relay
l C h e c k
o u t p u t coil, ignition
T h r o t t l e s e n s o r ,
control
Intake air
t e m p e r a t u r e
. . . sensor pressure
a
temperature sensor EGR
solenoidHeated oxygen
Fuel tank pressure
sensor (rear) Heated oxygen
Evaporativeemission canisterFuel tank
Crankshaft position sensor
Camshaft positionsensor
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ENGINE (TURBO)
AND
ENGINE> Troubleshooting
DTC No.
Closed throttle position switch malfunction
Power steering pressure sensorcircuit range/perfor mance
Transaxle range sensor circuit malfunction (RPNDL Input)
Transaxle fluid temperature sensor circuit malfunct ion
Turbocharger waste gate actuator malfunction Engine (Turbo)>
Turbocharger waste gate solenoid malfunction Engine
Fuel pressure solenoid malfunction Engine (Turbo)>
Manifold differential sensor circuit malfunction
Serial communication link malfunction
PG
malfunction
Solenoid assy malfunction
Enaine coolant temoerature level
circuit (to malfunction
NOTElWhen the ECM monitored mal-
1.After the Engine Control Module (ECM) detects function three times* and detected no
a malfunction, the check engine/malfunction
indicator lamp illuminates when the engine isIn this case, one time indicates from
next turned on and the same malfunction is
start to stop.
re-detected.lFor misfiring or a fuel trim malfunction,
However, for items marked with a the checkdriving conditions (engine speed, engine
engine/malfunction indicator lamp illuminatesant temperature, etc.) are similar to those
on the first detection of the malfunction. the malfunction was first recorded.
2. After the check engine/malfunction indicator
lamp illuminates, it will be switched off under
the following conditions.
Caution,
If the check engine/malfunction indicator lamp illu minates because of a malfunction of the
transmission between the scan tool and the PCM cann ot occur. In this the diagnostic
code cannot be read.
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ENGINE (TURBO)
AND
ENGINE> Troubleshooting .
6. Other monitoring
lMisfire
l Evaporative emission control system
l Idle air control system
l Manifold differential pressure sensor
lExcessive time to enter closed loop fuel control
l Throttle position sensor
l Barometric pressure sensor
Intake air temperature sensor
l Serial communication link
l Crankshaft position sensor
l Camshaft position sensor
Volume air flow sensor
Test conditions/procedure
l Engine coolant temperature sensor
l Closed throttle position switch
l Generator terminal circuit
l sensor circuit
l sensor heater circuit
Turbocharger waste gate solenoid
l EGR solenoid
lEvaporative emission purge solenoid
l Evaporativeemissionventilation
solenoid Engine>
l Fuel pressure solenoid
lInjector circuit
1. All of the following conditions should be satisf ied when the drive test is carried out.
(1) Engine coolant temperature:
or higher (when engine is fully warmed up)
(2) Outside air temperature:
or higher
(3)
condition:
lSelector lever position: range
l Overdrive switch: ON
lPower/economy changeover switch: Power
2. Carry out one trip monitoring according to the f ollowing drive pattern (from starting of the engine
until ignition is turned off). (Takes approximately 10 minutes.)
the engine is fully warmed up, turn the ignition s witch to OFF.
the engine, accelerate to between 56 64 km/h (35 40 mph) and drive at this speed
for 300 seconds or more. Then stop the vehicle. Bra king and throttle operations can be carried
out during this time.
stopping the vehicle, let the engine run at idle f or 300 seconds or more, and then turn
the ignition
to OFF.
The vehicle should be set to the following conditio n for idling.
l A/C switch: OFF
lLights, electric cooling fan and all accessories: O FF
lTransmission: Neutral (A/T for range)
lSteering wheel: position
Drive cycle pattern
300 seconds or more
km/h (35 40 mph)
64 (40)
Idling
Vehicle speed km/h (mph) transmission: Neutral
32 (20)
300 seo.
,
Ignition switch: OFF
100
NOTE:Throttle opening angle 50
0
Caution
The shaded areas in the graph indicate times when t he vehicle
speed should not go outside of the specified range.
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ENGINE (TURBO)
AND ENGINE> Troubleshooting
DTC No.Diagnostic itemsCheck items (Remedy}
page
Random misfire
detected*
Cylinder 1 misfire
detected*
Cylinder 2 misfire
detected*
Cylinder 3 misfire
detected*
Cylinder 4 misfire
detected*
Knock sensor 1 circuit malfunction
Engine (Turbo)>
Crankshaft position sensor circuit
malfunction
lIgnition coil Retained 74
Ignition power transistor
l Spark plug
R e t a i n e d Ignition circuit
I n j e c t o r
S e n s o r
Compression pressure I,
l
Timing belt
l Crankshaft position sensor
l Air intake
Fuel pressure
l Crankshaft position sensor circuit
and connector
l Harness and connector R e t a i n e d
(If harness and connector are not
defective, replace knock sensor.),
l Harness and connector R e t a i n e d
(If harness and connector are not
defective, replace crankshaft
tion sensor.)
Camshaft position sensor circuit l Harness and connector R e t a i n e d
function(If harness and connector are not defective, replace camshaft position
sensor.),
‘0400
‘0420
Exhaust gas recirculation flow
function
Exhaust gas recirculation solenoid
malfunction
Catalyst system efficiency below
threshold (Bankl) l
Harness and connector R e t a i n e d
l
EGR valve
l E G R s o l e n o i d
valve control vacuum ,
l Manifold differential, pressure sen-
sor
l Harness and connector
l EGR solenoid
l E x h a u s t m a n i f o l d ( R e p l a c e t h e R e t a i n e d
catalytic converter if there is no
cracks)
‘0440Evaporative emission control l Harness and connector R e t a i n e d
malfunction Engine (Turbo)>l
Evaporative emission purge Sole-
noid
l Purge control valve
l Vacuum hoses routing
‘0442
‘0443
‘0446
Evaporative emission control l Harness and connector R e t a i n e d
leak detected l
Evaporative emission purge
s o l e n o i d
l Evaporative emission ventilation
solenoidlVacuum hoses routing
Evaporative emission control system
l Harness and connector Retained
purge control valve circuit malfunc-l
Evaporative emission purgetion solenoid .
Evaporative emission control systeml
Harness and connector R e t a i n e d
vent control malfunction l
Evaporative emission ventilation..
solenoid
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ENGINE (TURBO)
AND
ENGINE> Troubleshooting
DTC No.Diagnostic items Check items (Remedy)MemoryRefer-
; ,
Evaporative emission control systeml Harness and connector
Retained
pressure sensor malfunctionl
Engine>F u e l t a n k d i f f e r e n t i a l p r e s s u r e
sensor
Vehicle speed sensorl Harness and connectormalfunctionl Vehicle speed sensor Retained
Idle control systeml
Harness and connector
RetainedmalfunctionlIdle air control motor
Closed throttle position switch mal-e Harness and connector Retained
functionlClosed throttle position switch
Power steering pressure sensor l Harness and connector
Retained
range/performancelPower steering pressure switch
Transaxle range sensor circuit mal-e Harness and connector Retainedfunction Input)lPark/neutral position switch
Turbocharger waste gate actuatorl Harness and connector
Retained
malfunctionl Turbocharger waste gate solenoid
Engine (Turbo)>l Turbocharger waste gate actuator ,
lVacuum hose routing
Turbocharger waste gate solenoidl Harness and connector Retained
malfunctionl Turbocharger waste gate solenoid
Engine (Turbo)>
Fuel pressure solenoid malfunctionl Harness and connector
Retained
Engine (Turbo)>lFuel pressure solenoid
Manifold differential pressure (MDP)l Harness and connector Retainedsensorcircuitl
MDP sensormalfunction
Pi 500Generator terminal
circuit malfunctionlHarness and connector
Serial communication link
tion
l Harness and connector R e t a i n e d
‘1750
‘1791PG assy malfunction
l
Harness and connector RetainedlPulse generator
Solenoid assy malfunction
l Harness and connector Retained
l
Converter clutch solenoid
l Shift control solenoid
lPressure control solenoid
Engine coolant temperature level in-
lHarness and connectorRetained
put circuit (to TCM) malfunction
1. Do not replace theengine control module (ECM) until a thorough termin al check reveals there are
no short/open circuits.
2.After the ECM detects a malfunction, a diagnostic t rouble code is recorded when the engine is next
started and the same malfunction is re-detected. Ho wever, for items marked with a the diagnostic
trouble code is recorded on the first detection of the malfunction.
3.
Heated oxygen sensor
4. Sensor 1: indicates sensors which are mounted cl osest to the engine.
5. Sensor 2: indicates sensors which are mounted ne xt-closest to the engine.
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ENGINE (TURBO)
AND ENGINE> Troubleshooting
Code No. Exhaust Gas Recirculation Flow MalfunctionProbable
[Comment]l EGR valve does not openBackgroundl EGR control vacuum is too lowlWhen the EGR solenoid switches from OFF to ON while the engine is running, EGRl EGR solenoid failedgas flows.lOpen or shorted EGR solenoid circuit, or l The engine control module checks how the EGR gas fl ow signal changes.connector
Check Areal Manifold differential pressure sensor failed
l Engine coolant temperature is higher than l Engine control failedl Engine speed is between 1000 and 2000 l Engine speed is between 940 and 2000 .
l Intake air temperature is
or higher.
l Barometric pressure is 76 (11 psi.) or higher.
l Closed throttle position switch: ON
l Volumetric efficiency is 15%
or 27% or lower. engine l Volumetric efficiency is 15% or 20% or lower. engine>
l Monitoring Time: 2
Judgement Criterial There is no change in the condition of the air inta ke system when the EGR solenoid
is turned on.
l Monitored only once per trip.
Check the EGR system (Refer to GROUP 17 Emission Control(Refer to GROUP 17 Emission System) Engine EGR solenoid
(Refer to GROUP 17 Emission Control System)
OK
Replace,
Check the following items.
l Vacuum hoses
l EGR
vacuum7
l EGR valve
Check the manifold differential pressure sensor malfunction95 Manifold differential pressure sensor (Refer to (Refer to INSPECTION PROCEDURE FOR TROUBLE CODE
Check for EGR valve and EGR line blockages, and cle an if
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ENGINE (TURBO)
AND ENGINE> Troubleshooting
Code No. Evaporative Emission System
Detected Malfunction Engine>Probable cause
[Comment]lImproper tightening of fuel tank filler tube cap
Backgroundl Fuel vent valve failedlThe engine control module turns the evaporative emi ssion ventilation solenoid on in order Purge line or to shut off the outside air of the evaporative emission canister.lBroken seal in fuel purge line or vaporNext, the evaporative emission purge solenoid is driven at the specified duty (approximately
line25%) to generate a negative pressure in the fuel ta nk and purge line, etc.
l Evaporative emission, purge solenoid failedWhen a negative pressure is generated in the fuel t ank and purge line, etc., the evaporativeemission purge solenoid turns off and the fuel tank and purge line, etc. are sealed.l
Evaporative solenoidfailed,
After they are sealed, monitoring of pressure diffe rences inside the fuel tank starts, andlFuel tank differential failed
if there is a large drop in pressure over a given t ime (if the negative pressure is leakinglEngine coolant temperature sesnor failedout into the atmosphere and the pressure has approa ched barometric pressure), the enginel Intake air temperature sensor failed
control module judges that there is a leak in the f uel tank, purge line or vapor line.
l Power steering pressure switch failed
Furthermore, if the fuel tank internal pressure doe s not drop even if the evaporative emission Incorrect fuel used
purge solenoid is driven while the outside air of the canister is shut off (becauseof a blockage in the purge line or because the fuel tank filler tube cap has not been
tightened correctly), the engine control module jud ges that there is a problem with the
system and the check engine/malfunction indicator l amp illuminates.
Check Area
l Engine coolant is not lower than Engine speed is at between 1600 3500 l Power steering pressure switch: OFF Ambient pressure is not lower than 76 (11.0 psi). Volumetric efficiency: 20 Intake air temperature is not lower than Pressure increase when evaporative emission purge s olenoid and evaporative emission
ventilation solenoid are closed is 50 or less. Pressure variation range is 66 or less. Monitoring time: 50 100 sec.
CriteriaInternal pressure of the fuel tank has not changed more than 100 in 20 after
the tank and vapor line were closed. .
Check if the fuel tank filler tube cap is attached correctly.
OK
NG
N G
Attach correctly.
Repair or replace
OK
SCAN TOOL Actuator test
06 Evaporative emission purge solenoid (Refer to
OK
Check the evaporative emission control system purge control valvecircuit malfunction (Refer to INSPECTION DURE FOR DIAGNOSTIC TROUBLE CODE
NGSCAN TOOL Actuator test29 Evaporative emission ventilation solenoid (Refer to
OK
Check the evaporative emission control system vent control function (Refer to INSPECTION PROCEDURE FOR
DIAGNOSTIC TROUBLE CODE
SCAN TOOL Data listN G
73 Fuel tank differential pressure sensor (Refer to Check the evaporative emission control system pres sure sensor
DIAGNOSTIC TROUBLE CODE
SCAN TOOL Data list
21 Engine coolant temperature sensor (Refer to Check the engine coolant temperature sensor circuit malfunction
OKTIC TROUBLE CODE
SCAN TOOL listN G
13 Intake air temperature sensor (Refer to
OK
Check the intake air temperature sensor circuit mal function (Referto INSPECTION PROCEDURE DIAGNOSTIC
TROUBLE CODE
27 Power steering pressure switch (Refer to
OK
Check the power steering pressure sensor circuit r ange/perfor-
mance (Refer to INSPECTION PROCEDURE FORDIAGNOSTIC TROUBLE CODE
l Check for contamination (water, kerosene, etc.) in the fuel.
have failed. [Refer to the Emission Diagnosis Manua l (Pub.
Revision

ENGINE (TURBO)
AND ENGINE> Troubleshooting
Code No. Evaporative Emission
Pressure Sensor Malfunction Engine>
[Comment]Background
lThe fuel tank differential pressure sensor outputs the voltage in proportion to the pressurein the fuel tank. (differential pressure against the barometric pressure)
l The engine control module checks whether the output voltage of the fuel tank differential
pressure sensor is within the specified range
Check Area, Judgement Criteria 1. Check Area
l Engine speed is not lower than 1500
l Volumetric efficiency is between 25
Judgement Criterial
The sensor output voltage is 4.5 or higher for 10 seconds even though the intake
air temperature is between 5” and the evaporative emission
purge solenoid is being driven at 100% duty.
or
l The sensor output voltage is 0.5
or lower for 10 seconds even though the intake
air temperature is (41 or higher and the evaporative emission purge solen oid
is not being driven.
2. Check Area l The pressure fluctuates 20 times or more at 0.2
or higher.
l Closed position switch: ON
Judgement Criterial
The pressure fluctuates 20 times or more (0.2 or higher) for 15 consecutive idleoperations.
Fuel tank differential pressure Openor shorted fuel o r Engine control module ,
.
Disconnect the connector and measure at the harness side.
2. Continuity between 2 and ground OK: Continuity
OK
NGCheck the following Repair
NGNGCheck the harness Repair
between fuel tank differ-
ential
sensor and
Replace the fuel tank differential pressure sensor.
NGNGCheck the harness wire
between fuel tank differ-
/ Check
Check the harness wire between fuel tank differenti al pressure
sensor and ground. Repair, if necessary.
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