1990 MITSUBISHI SPYDER Service Repair Manual

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Page 385 of 2103

MITSUBISHI SPYDER 1990 Service Repair Manual ENGINE (NON-TURBO)>
MULTIPORT FUEL INJECTION SYSTEM
Heated oxygen sensor Power supply(Front)l Vehicle speed sensor
Manifold absolute l switch
sure sensor l position Intake air tem

Page 386 of 2103

MITSUBISHI SPYDER 1990 Service Repair Manual Service ENGINE (NON-TURBO)> Sealants
SERVICE SPECIFICATIONS
Ignition timing
Curb idle
Idle speed when is ON
Standard value
BTDC. at curb idle (Nonadjustable)-
800 100
850 in Neutral
T

Page 387 of 2103

MITSUBISHI SPYDER 1990 Service Repair Manual ENGINE (NON-TURBO)> ,
SPECIAL TOOLS
Scan tool
Interface
Fuel pressure gaugeUse with
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Page 388 of 2103

MITSUBISHI SPYDER 1990 Service Repair Manual ENGINE (NON-TURBO)> Troubleshooting
TROUBLESHOOTING
DIAGNOSTIC TROUBLESHOOTING FLOW
Gather information fromcustomer.
Verify complaint
Reoccurs
Read the diagnostic trouble code (Refer

Page 389 of 2103

MITSUBISHI SPYDER 1990 Service Repair Manual ENGINE (NON-TURBO)>
TEST MODE
CHECK ENGINE/MALFUNCTION INDICATOR LAMP
As a functional test, the Malfunction Indicator Lam p
illuminates at key-on before engine cranking.
Whenever

ENGINE (NON-TURBO)>
TEST MODE
CHECK ENGINE/MALFUNCTION INDICATOR LAMP
As a functional test, the Malfunction Indicator Lam p
illuminates at key-on before engine cranking.
Whenever the Power-train Control Module (PCM) sets a
diagnostic trouble code that effects vehicle emissi ons, it
illuminates the
The PCM illuminates the for
diagnostic trouble codes that effect vehicle emissi ons. The
remains on until the diagnostic trouble code is erased.
The
either flashes or illuminates continuously when
PCM detects active engine misfire.
During active misfire, thePCM records the
operating conditions. The engine operating conditio ns
recorded by the PCM.
ItemsIndicated by the Check Engine/Malfunction Indicator Lamp
DTC No. Items
01No cam signal at PCM
02Internal controller failure
EGR solenoid circuit
EVAP solenoid circuit
Injector control circuit
20Injector control circuit
21Injector control circuit
25Idle air control motor circuit
26Throttle position sensor voltage low
27Throttle position sensor voltage high
30Engine coolant temperature voltage too low
31Engine coolant temperature voltage too high
32Upstream stays at center
35
No vehicle speed sensor signal
36
07) MAP sensor voltage too low
37MAP sensor voltage too high
39No change in MAP from start to run
42Ignition coil primary circuit
43Ignition coil primary circuit
46
EGR system failure
57Intake air temperature sensor voltage low
58Intake air temperature sensor voltage high
61Injector control circuit
62Upstream shorted to voltage
68PCM failure communications
71 temperature volts out of limit
, .
,
92 (PI 490)
93
101
33)
103
Low speed fan control relay circuit
High speed fan control relay circuit
Fuel pump relay control circuit
Upstream
response
Upstream
heater failure
Downstream
heater failure
Multiple cylinder misfire
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Page 390 of 2103

MITSUBISHI SPYDER 1990 Service Repair Manual ENGINE (NON-TURBO)> Troubleshooting
DTC No. ItemsI
107
108
109
110
112
113
114
118
119
126 38)
Cylinder misfire
Cylinder
misfire
Cylinder
misfire
misfire
Catalytic
efficiency failure

ENGINE (NON-TURBO)> Troubleshooting
DTC No. ItemsI
107
108
109
110
112
113
114
118
119
126 38)
Cylinder misfire
Cylinder
misfire
Cylinder
misfire
misfire
Catalytic
efficiency failure
EVAP purge flow monitor failure
Park/neutral position switch (transaxle range switc h) failure
Fuel system rich
Fuel system lean
Downstream
shorted to
128Closed loop temperature not reached
129
Downstream at center
132
133
TPS voltage does not agree with MAP
Timing belt skipped 1 tooth or more
135No 5 volts to MAP sensor
136No 5 volts to throttle position sensor
137EATX controller DTC present
138Taraet idle not reached
High speed radiator fan control relay
146 1496)
153
154
155
156
157
160
161
183
5 volts too low
Battery temperature sensor voltage too low
Battery temperature sensor voltage too high
Upstream
voltage grounded
Downstream
voltage grounded
Intermittent loss of CMP or CKP
EVAP leak monitor small leak detected
EVAP leak monitor large leak detected
Evaporative emission ventilation solenoid circuit
Evaporative emission ventilation solenoid switch or mechanical fault
EVAP leak monitor pinched hose found
NOTE
Following a detected malfunction of the Control Module (PCM), the check engine lamp
up the next time the engine is turned on if the mal function is still detected. However, for items
with an asterisk in the table above, the check engine lamp goes on’ the first time a malfundin is
detected.
Once the check engine lamp is lit, any one of the f ollowing
will turn it off.
lWhen the PCMhas found no malfunction after monitoring the power train times time
is from engine start to engine stop).
lA misfire of fuel abnormality when engine speed, coolant temperature, etc. are to those
when the malfunction was first recorded, and the PCM has detected no malfunction.
Caution
If the check engine lamp is turned on by a malfunct ion of the PCM, the scan tool communicate
with the PCM, and the diagnostic trouble code canno t be read.
,
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Page 391 of 2103

MITSUBISHI SPYDER 1990 Service Repair Manual ON-BOARD DIAGNOSTICS
The
Control Module (PCM) monitors
many different circuits in the fuel injection syste m.
If the PCM senses a problem with a monitored
circuit often enough

ON-BOARD DIAGNOSTICS
The
Control Module (PCM) monitors
many different circuits in the fuel injection syste m.
If the PCM senses a problem with a monitored
circuit often enough to indicate an actual problem,
it stores a diagnostic trouble code in the
memory.
After the PCM first detects a malfunction, a
diagnostic trouble code is recorded when the engine
i s r e s t a r t e d a n d t h e s a m e m a l f u n c t i o n i s
re-defected. However, for items marked with a
a diagnostic trouble code is recorded the
first detection of the malfunction.
After that, if the PCM does not re-detect the
malfunction for 40 drives* (51 engine start for
non-emission related faults), the diagnostic troubl e
code will be erased from the PCM memory.
NOTE
A drive indicates from engine start to stop and
monitors the power train component.
However, for misfiring or a fuel system rich/lean,
the diagnostic trouble codes will be erased under
the following conditions.
lWhen driving conditions (engine speed, engine
coolant temperature, etc.) are similar, to those
when the malfunction was first recorded.
l When the PCM does not re-detect the
malfunction for 80 drives*.
Technicians can display stored diagnostic trouble
codes by two different methods.
ENGINE (NON-TURBO)> Troubleshooting
The first is to cycle the ignition switch
On-Off-On-Off-On within 5
Then count
the number of times the malfunction indicator lamp
(check engine lamp) on the instrument panel flashes
on and off. The number of flashes represents the
diagnostic trouble code. There is a slight pause
between the flashes representing the first and
second digits of the code. Longer pauses separate
individual trouble codes. The second method of
reading diagnostic trouble codes uses
scan
Connect the scan tool to the
(diagnostic) connector in the vehicle.
FREEZE FRAME DATA
The PCM records the diagnostic trouble code and
also the engine operating conditions the time
the malfunction was detected. are called
“freeze frame” data.
This data indicates the engine operating condition
from when nothing at all is the initial
detection of the
However, misfiring
or fuel trim malfunction data are always. replaced
with the latest data.
This data can be read by using the scan tool, and
can then be used in simulation tests for
troubleshooting.
Data items are as follows.
DataUnit
Engine coolant temperature
Engine speed
Vehicle speed
or
or RPM
km/h or mph
Long-term fuel compensation (Long-term fuel trim)
Short-term fuel compensation (Short-term fuel trim)
Fuel control condition O p e n l o o p
l Closed loop
l Open loop-Drive condition
l Open loop-DTC set
lMalfunction of closed (rear)
Calculated load value
MAP vacuum
(vacuum)
Diagnostic trouble code during data recording
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Page 392 of 2103

MITSUBISHI SPYDER 1990 Service Repair Manual ENGINE (NON-TURBO)> Troubleshooting.
HOW TO READ AND ERASE DIAGNOSTIC
CODES
TSB Revision Caution
1. If battery voltage is diagnostic codes.
may not be output. Be sure to chec

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