1990 MITSUBISHI SPYDER Service Repair Manual

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Page 569 of 2103

MITSUBISHI SPYDER 1990 Service Repair Manual ENGINE
AND ENGINE> Troubleshooting
Engine>, ,
N GCantheoperation sound be heard Check the idle air control motorsystem. (Refer to after the ignition switch is turned INSPECTIO

Page 570 of 2103

MITSUBISHI SPYDER 1990 Service Repair Manual ENGINE (TURBO)
AND ENGINE> T r o u b l e s h o o t i n g
Code No. Closed Throttle Position Switch MalfunctionProbable cause
[Comment]l Closed throttle position switch failed. Backgro

Page 571 of 2103

MITSUBISHI SPYDER 1990 Service Repair Manual ENGINE (TURBO)
AND ENGINE> Troubleshooting
Code No. Power Steering Pressure Sensor CircuitProbable cause
[Comment] Power pressure switch Backgroundl Open or shorted power steering

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.)
TSB Revision

Page 572 of 2103

MITSUBISHI SPYDER 1990 Service Repair Manual ENGINE (TURBO)
AND
Code No. Turbocharger Waste Gate Solenoid
Malfunction
Engine (Turbo)>
Probable cause
[Comment]l Turbocharger waste gate solenoid BackgroundlThe engine control modu

Page 573 of 2103

MITSUBISHI SPYDER 1990 Service Repair Manual ENGINE (TURBO)
AND ,
Code No. Fuel Pressure Solenoid Malfunction
Engine
BackgroundlThe engine control module checks current flows in the fuel pressure solenoid drive circuitwhen

Page 574 of 2103

MITSUBISHI SPYDER 1990 Service Repair Manual 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 co

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
TSB Revision.

Page 575 of 2103

MITSUBISHI SPYDER 1990 Service Repair Manual 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

Page 576 of 2103

MITSUBISHI SPYDER 1990 Service Repair Manual (TURBO)
AND ENGINE> Troubleshooting
Code No. Generator Terminal Circuit Malfunction
[Comment]
Background
lWhen the generator field coil is controlled, the generator terminal inpu

(TURBO)
AND ENGINE> Troubleshooting
Code No. Generator Terminal Circuit Malfunction
[Comment]
Background
lWhen the generator field coil is controlled, the generator terminal inputs a signal to
the engine control module.
lThe engine control module detects the generator out put with the input signal, and controlsthe idle air control motor according to the generator output.
Check Area
l Engine speed is higher than 50
Judgement CriterialInput voltage from the generator terminal has continued to be not lower than 4.5 for 20 sec.
Measure at the generator connector
l Connect the connector.
l Voltage between 4 and ground
Engine: Idle
Radiator fan: stopped
Headlight: off
on
Stop Lamp: off on
Rear defogger switch: off on
OK: voltage drops
NG
Measure at the generator connector lDisconnect the connector, and measure at the harnes s side.
l Voltage between 4 and ground (Ignition switch: ON)
O K :
Probable cause
lOpen circuit in generator terminal circuitl Enginecontrol module failed
,
Replace the ECM.
,
. ,
Check trouble symptom.
NG
NG
Repairbetween theECMand the
OK
connector:
NG Repair
OK
Check trouble symptom. generator
NG
Check the NG Repair Replace the ECM.I
TSB Revision
Replace the generator.1
Code No. Serial Communication Link Malfunction
Probable cause
(with
[Comment]l Automatic transaxle control system Backgroundl Open or short circuit in communication linelThe engine control module receives message signals from the transaxle control modulebetween engine module and transaxlevia the communication line. control module, or poor connector contactlThe engine control module monitors abnormalities in message signals resulting froml
Transaxle control module failed.
a broken communication line or transaxle control mo dule problems.l Engine control module failed.
Check Areal 2 seconds or more have passed since starting was co mpleted.
Judgement CriterialAbnormality in communication line (TCM to ECM) with transaxle control module l Problem with transaxle control module (TCM).

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