1990 MITSUBISHI SPYDER sensor

ENGINE (TURBO)
AND ENGINE> Troubleshooting
Code No. Power Steering Pressure Sensor CircuitProbable cause
[Comment] Power pressure switch Backgroundl Open or shorted power steering pressurelWhen the steering wheel is kept in the position during driving, the power
s w i t c h or steering pressure switch will be momentarily turned off. E n g i n e c o n t r o l f a i l e d ’lThe enginecontrol module checks whetherthe powerste ering pressure switch momentarilyturns off during driving.
Check Area Engine coolant temperature is or higher.
l Driving and stopping ‘2 are repeated times or more.“1: Engine speed is 2,500 or higher, volumetric efficiency is 55% or higher, and this
condition continues for 2 seconds or more.
l 2: Engine speed is 600 or lower.
Judgement Criterial Power steering pressure switch stays on without cha nging.
NGCheck the power steering press On-vehicle Service) Replace
lDisconnect the connector and measure at the harness side.
NG
between ECM and power pressure switch
NG
the ECM. Replace the ECM.
Code No. Transmission Range Sensor Circuit
Malfunction (RPNDL Input)
[Comment]
Background
lWhen a malfunction of the park/neutral position swi tch is detected, the transaxle control
module outputs amalfunction signal to the engine control module.
Check Area, Judgement Criteria l
control module.
Check the TCM. (Refer to GROUP Troubleshooting.)
Repair
Repair
cause
l Park/neutral position switch failedlOpen or shorted park/neutral position switchcircuit, or loose connector.
l Engine control module failed.
Code No. Turbocharger Waste Gate Actuator
Malfunction
(Turbo)> Probable cause
l
Turbocharger waste gateactuator failed.
l Charging pressure control system failed.
l Engine control module failed.[Comment]
Background
lThe engine control module checks that the engine is not overcharged by always monitoringintake air volume.lThe engine control module protects the engine by shutting off fuel when an overcharged
condition is detected.
Check Area
Engine coolant temperature is higher than
Judgement Criterial Volumetric efficiency has continued to be not lower than 200% for 1.5 sec.
Check the turbocharger supercharging. (Refer to GROUP 15
On-vehicle Service.)
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E N G I N E
A N D ,
Code No. Differential
Malfunction
[Comment]BackgroundManifold differential se.
l pressure in the intake manifold. o r l o o s e Engine control. lThe engine control module checks whether the voltage output by manifold differential sure sensor is within a specified range.
Check Area, Judgement Criteria.
1. Check Areal min or more have passed after the engine was start ed.[However, this is only when the engine coolant temperature is or lower
when the engine is started.]
Engine coolant temperature is not lower than Intake air temperature is not lower than Barometric pressure is 76 (11 psi.) or higher. Volumetric efficiency is 30% 55%.
Judgement Criteria . ,
Sensor output voltage has continued to be not lowe
r than [corresponding toan absolute pressure of 118 (17 psi) or higher] for 4 sec.orSensoroutput voltage has continued to be not higher than 0.1 [corresponding to ---
an absolute pressure of 2.4 (0.3 psi) or lower] for 4 sec.
2. Check Area
8 min or more have passed engine Started.
[However, this is only when the engine coolant or lower when the engine is Engine coolant temperature is not lower than Intake air temperature is not lower than Barometric pressure is 76 (11 psi.) or higher. Volumetric efficiency is 30% or lower.
Judgement Criteria ,
l Sensor output voltage is 4.2 or higher for 4 seconds [absolute pressure is 108 (16 psi.) or more]
Check Area 8 min or more have passed after the engine was sta rted.
,
.
. , ,
[However, this is only when the engine coolant temperature is or lowerwhen engine is started.]
l Engine coolant temperature is not lower than .l Intake air temperature is not lower than l Barometric pressure is 76 (11 psi.) or higher. Volumetric efficiency is 70% or higher.
Judgement Criterial Sensor output voltage is or lower for 4 seconds [absolute pressure is 46 (6.7 psi.) or less]I
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ENGINE (TURBO),
AND ENGINE>
Measure at the MDP sensor con-
nector
l test harness: Voltage between 1 and ground(Engine: Idle)
O K :
Voltage between 1 and groundO K : when the
at idle.
NG
OK
Measure at the ECM connector
Connect the connector.Voltage between 73 and ground
O K :
Check the following connector:
Replace the ECM. Measure at the MDP sensor con-
nector
Disconnect the connector, andmeasure at the harness side.Voltage between 3 and ground(Ignition switch: ON)OK:
NG Check the Repair
Check trouble symptom.
Check the following connector:
. . .
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ENGINE (TURBO)
INSPECTION PROCEDURE 4
The check engine/malfunction indicator lamp remains
and never goes out.
[Comment]
In cases such as the above, the cause is probably t hat the ECM is detecting a problem in a
sensor or actuator, or that one of the malfunctions listed at right has occurred.
,
P r o b a b l e c a u s e
l c h e c k indicator lamp and ECM
l Malfunction of the ECM
SCAN TOOL
DTCRefer to I N S P E C T I O N C H A R T F O R TROUBLE CODES.
lDisconnect the connector, and measure at the harnes sside.l Disconnect the ECM connector.
l Continuity between 51 and ground
OK: No continuity
OK Check the harness wire between-combination meter an
d
tor. Repair, if necessary.
Replace the ECM.
INSPECTION PROCEDURE 5
Cranks, won’t start Probable cause
[Comment]l Malfunction of the ignition systemIn cases such as the above, the cause is probably t hat the spark plugs are fouled defective, orl Malfunction of the fuel pump systemthat the supply of fuel to the combustion chamber i s defective. Malfunction of the injector systemIn addition, foreign materials (water, kerosene, etc.) may be mixed with the fuel.l Malfunction of the ECM
l Foreign materials in fuel
Scan tool: Inspection when no initial combustion oc curs.
(Refer to
INSPECTION PROCEDURE 36.)
OK
Can any sound be heard from (Refer to
Yes
Ignition system: Inspection when no initial combust ion oc-curs. (Refer to INSPECTION PROCEDURE37.)
OK
PROCEDURE FOR DIAGNOSTIC TROUBLE CODES
Check battery positive voltage when cranking.
OK: 8 or hiaher Check the battery. (Refer to GROUP 54 -Battery.)
Check the following items. l Check the ignition coil, spark plugs, spark plug ca bles.
l Check if the injectors are clogged.
l Check if foreign materials (water, alcohol, etc.) g ot into fuel.
l Check the compression pressure.
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ENGINE (TURBO)
ENGINE>
INSPECTION PROCEDURE 6
Fires up and dies.Probable cause .
[Comment] Malfunction of system
In such cases as the above, the cause is probably that the spark plugs are generating sparksl Malfunction of the injector systembut the sparks are weak, or the initial mixture for starting is not appropriate. Foreign materials in fuel P o o r Malfunction of the ECM .
Check battery positive voltage wh
OK: 8 or higher
OK
Check the battery. (Refer to GROUP
Scan tool: Inspection when incomplete combustion oc curs.(Refer to INSPECTION PROCEDURE 38.)
OK
Yes
INSPECTION
PROCEDURE FOR DIAGNOSTIC TROUBLE
,
Is starting good if the engine Yes.
pedal depressed?
No
Check idle air control motor for operation sound. Check the idle control malfunction (Refer toEngine (Refer to
(Check idle air control motorfor operation sound (Refer to
INSPECTION
TROUBLE
Clean the valve
(Refer to
l Check and adjust the
Check the ignition timing when cranking.
OK:
OK
Check the following items. l Check the ignition coil, spark plugs, spark plug ca bles.
Check if the injectors are clogged. Check the compression pressure.
l Check fuel lines for clogging.
l Check if foreign materials (water, alcohol, etc.) g ot into fuel.
,
Check that the crankshaft position sensor and
belt cover are
installed property.
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ENGINE (TURBO)
AND ENGINE> Troubleshooting
INSPECTION PROCEDURE 7
In cases such as the above, the cause is probably that the spark is weak and ignition is difficult,
the initial mixture for starting is not appropriate , or sufficient compression pressure is not being
Probablecause .
Malfunction of the ignition system
l Malfunction of the system Inappropriate gasoline use P o o r
Check battery positive
OK: 8 or higher Check the battery. (Refer to GROUP 54 -Battery)
Scan tool: Inspection when incomplete combustion oc
curs.(Refer to INSPECTION PROCEDURE 38.)
OK
Can any sound be heard
(Refer to
Yes
No
PROCEDURE FOR DIAGNOSTIC TROUBLE CODES .
Check the ignition timing when cranking.
OK:
OK Check that the crankshaft position sensor and
belt cover are
installed
Check the following items.
l Check the ignition coil, spark plugs, spark plug ca bles.
l Check if the injectors are clogged.
l Check the
l Check if foreign (water, alcohol, etc.) got into fuel.I
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E N G I N E ( T U R B O )
AND ENGINE>
INSPECTION PROCEDURE 8
Unstable Rough
[Comment]
In cases such as the above, the cause is probably t hat the ignition system, air/fuel mixture, idle
air control motor or compression pressure is defect ive.
Because the range of possible causes is broad, insp ection is narrowed down to simple items.
W ere the battery terminals disconnected recently
NOAfter warming-up, let the
for minutes.’ ,
SCAN TOOL DTC YES
Are diagnostic trouble codes output Refer to INSPECTION FORDIAGNOSTICT R O U B L E C O D E S .
Does idle speed fluctuate excessively
NO(Refer to INSPECTION 39.)
Check the idle air control motor for operation soun d
control motor for operation sound engine>. (ReferNG .
Probable cause ,
Malfunction of the ignition of system
l M a l f u n c t i o n s y s t e ml Malfunction of the evaporative purge system-
l Poor compression
l Drawing air
exhaust system
Check the idle control system malfunction (Refer to INSPECTION PROCEDURE FOR DIAGNOSTIC TROUBLECODE
ChecktheinjectorforoperationI .
PROCEDURE FOR DIAGNOSTIC TROUBLE-CODES
Scan tool: Inspection when idle speed is unstable.
(Refer to INSPECTION PROCEDURE 40.)
Check the ignition timing. Engine (Turbo)>
(Refer to GROUP On-vehicle Service.)
Check the ignition timing. Engine>
(Refer to GROUP On-vehicle
Check that the crankshaft position sensor and timi ng belt cover are
installed properly.
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OK
SCAN TOOL Actuator test 10 EGR solenoid (Refer to NG.
OK
Check the exhaust gas recirculation solenoid malfun ction.(Refer to INSPECTION PROCEDURE FOR DIAGNOSTICTROUBLE CODE
Check the following items.
l Check the ignition coil, spark plugs, spark plug ca bles.
l Check the purge control System.
l Check the compression pressure.
l Check if foreign materials (water, alcohol, etc.) g ot into fuel.
l Check the EGR system.

ENGINE (TURBO)
AND ENGINE> Troubleshooting
INSPECTION PROCEDURE 11
When the engine is cold, it stalls at idle. (Die out)P r o b a b l e c a u s e .
[Comment]l Malfunction of the system
In such cases as the above, the cause is probably t hat the mixture is inappropriate whenl the bodythe engine is cold, or that the intake air volume is insufficient.l Malfunction of the injector system Malfunction of the s y s t e m
W ere the battery terminals disconnected recently
NO
After warming-up, let the engine run at idling for 10 minutes.
SCAN TOOL DTC
Are diagnostic trouble codesoutput?Refer to INSPECTION CHART FOR TROUBLE CODES.
(Refer to Check and adjust the (Refer to ,
NO
Is engine-idling stable after the warming-up
YES(Refer to INSPECTION PROCEDURE
Check the idle air control motor for operation soun d NG
Engine (Turbo)>. (Refer to Check the idle air control motor for operation sound (Refer to
Checktheinjectorforope
OK
Check the idle control system malfunction to .INSPECTION PROCEDURE FOR DIAGNOSTIC TROUBLE CODE
PROCEDURE FOR DIAGNOSTIC TROUBLE CODES
SCAN TOOL Data list Check the closed position switch system.
26 Closed throttle position switch (Refer to INSPECTION PROCEDURE FOR
OKTROUBLE CODES
SCAN TOOL Data listN G Check the engine coolant temperature circuit malfu nction. (Refer to21 Enginecoolanttemperaturesensor P. I N S P E C T I O N P R O C E D U R E F O R TROUBLE CODES
Check the fuel pressure. (Refer to I
Check the ignition timing. Engine Check that the position sensor and belt cover are
(Refer to GROUP
(Refer to GROUP Check the ignition timing. Engine>
Check the following items.
l Check the ignition coil, spark plugs, spark plug ca bles.
l Check the compression pressure.
l Check the engine oil viscosity.
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