1990 MITSUBISHI SPYDER check engine

ENGINE (NON-TURBO)> Troubleshooting
INSPECTION PROCEDURE FOR DIAGNOSTIC TROUBLE CODES
Scan tool 01
Code General scan tool
No.No Cam Sync Signal at PCMProbable cause
54
[Comment]l Open supply circuitBackgroundl Open sensor groundlThe PCM uses information from both the camshaft pos ition sensor and crankshaft positionl Open or shorted signal circuit
sensor to determine ignition timing. l Damaged camshaft target magnet
lWhen the camshaft position sensor signal is lost, t he PCM relies on the positionl Sensor failed,
sensor signal to allow engine operation. l PCM failed
lThis could result in fuel injection being out of phase, which would result in deteriorationof engine performance and emissions.
Range of Check ,
l
Ignition switch: ON
l Crankshaft position sensor signal (High or low) is input (Engine: Cranking).
Set ConditionlCamshaft position sensor signal (High or low) isn’t input for 2 seconds.
Check that the camshaft position
NG
Measure at the camshaft sensor connector lDisconnect the connector, and measure at the harnes s side.
l Voltage between 1 and ground
(Ignition switch: ON)
O K :
Repair
N GNG C h e c k t h e Repairconnectors:
l Voltage between 3 and ground
(Ignition switch: ON)
O K :
l Continuity between 2 and ground
OK: Continuity
OK
Check trouble
NG
Check the harness wire between the PCM and camshaf t positionsensor connector.
OK
NG
Replace the PCM.Repair
Check the following connector:
Repair
Check trouble symptom.
N G
Replace the camshaft position sensor.I
,
Check trouble symptom.
the PCM. I’
Scan tool 02
Internal Controller FailureNo.
53
P r o b a b l e c a u s e
[Comment]Set Condition l
PCM failed
l An internal fault has been detected in the PCM
Replace the PCM.
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ENGINE (NON-TURBO)>
C h a r g i n g T o o
47
[Comment]
Background
The PCM tries to maintain charging system voltage of between and 15 volts.
l This code indicates:
The battery voltage input is below the target charg ing voltage during engine
andNo significant change in voltage has been detected during active testing of the generator
output circuit.
Range of Check
lEngine speed: or more for approx. one minutelBattery positive voltage is at least 1 lower than the target charging voltage for approx.60 seconds.Set ConditionlBattery positive voltage does not change even if th e generator field current is cut off.
lDefects in generator or adjustmentl High resistance generatorl High between battery and
generator ground
l PCM
Check that the generator drive belt is properly in stalled. Repair
NG Measure the voltage between the generator terminal and the battery positive terminal. Engine: 1600 Headlight: High beam ON)
OK: Less than
Check the harness wire and terminal generator terminal and battery necessary.
NGMeasure the voltage between the generator body and battery Check the generator grounded line: neoative terminal. Engine: 1600 Headlight: High beam ON)
OK: Less than 0.5
OK
Measure at the generator lDisconnect the connector, and measure at the harnes s side.
SCAN TOOL Actuator test 10
relay (ASD relay) isturnedonandoff everyapprox. l Voltage between 1 and ground
[Measure when the relay (ASD relay) is turned on.]
OK: Battery positive voltage
NG Check the wire between generator relay
(ASD relay) connector. Repair, if necessary.
OK
Check the harness wire NG Repair connector.I
OK NG
SCAN TOOL SENSOR READ TEST (Data list) Check the harness wire between the PCM and the bat tery 10 Battery voltage as the ignition switch. Repair, if necessary.OK: indicated on the scan tool and actual positive
Check trouble symptom.
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ENGINE (NON-TURBO)> Troubleshooting
Scan tool 06
General scan tool Charging System Voltage Too
.High
46
[Comment]
Background Generator internal shorted
l The PCM tries to maintain charging system voltage o f between 13.2 and 15 volts.l
Generator field driver shorted to ‘ground l PCM failedlThis code indicates that the battery voltage input is above the target charging voltage
during engine operation and PCM efforts to regulate the generator field do not prevent
the voltage from rising.
Range of Check
lEngine speed: 1500 or more for approx. one minute
Set Condition ,
lBattery positive voltage is at least higher than target charging voltage for approx. 12seconds.
SCAN TOOL SENSOR READ TEST (Data list)
36 Charging system goal
OK:
or more
Replace the PCM.
SCAN TOOL SENSOR
(Data list)as well as me ignitionswitch. necessary.OK: on the scan tool and actual battery positivelCheck the wire between the PCM and ground.
voltage are the same. Repair, if necessary.
OK
, NG
tor. and if necessary.
Measure at the generator connector Repair megeneralDisconnect the connector and measure at the equipme nt side.l Continuity between 2 and generator body.
OK: No continuity
I
OK
Check me following NG Repair
OK
Check trouble symptom.
Check the harness wire
NG
OK
Repair
Replace the PCM.
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Scan tool 16
General scan tool A/C Clutch Relay Circuit ,.
33
[Comment]Coinpressor clutch relay shortedBackgroundl control circuit defectivel The PCM provides a switched ground to the clutch relay.
l circuit driver in PCMlThe PCM can prevent operation of the clutch in selected situations such as duringwide-open or for a period at start-up.l This DTC indicates an open or short-circuit conditi on in the circuit.Range of Checkl Ignition ONl Battery voltage: or morel 30 seconds or more after starting engineSet ConditionlOpen or short circuit is detected in the A/C clutch relay control circuit for 3 seconds.
N G relay. Replace
. .
. 55 On-vehicle Service) me (Refer to GROUF
OK
Measure at the PCM connectors and lDisconnect the connector, and measure at the harnes s side.
l Voltage between 36 and ground, and 64 and ground
(Ignition switch: ON)
switch: ON)
OK: Battery positive
l Connect a jumper wire between and the ground.
(Ignition switch: ON)
(A/C switch: ON)
OK:
compressor clutch is turned on
N G
Check the system (Refer to GROUP 55 Troubleshooting) Check trouble symptom.
NG
Replace the . ,
I ,
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ENGINE
Scan tool 19
Injector Control Circuit.Probable cause,
MIL 27
[Comment]
Backgroundl Open or shorted injector control
l Grounds for the injector circuits are provided by t he PCM.l i n j e c t o r
l Battery power is provided through the
relay (ASD relay) l
Open (ASD) supply l Driver in PCM failed lThis DTC is set if an open or short-circuit conditi on is detected in the control circuit for
the individual injector.
,Range of Checkl Battery voltage: or morel relay (ASD relay): ONl Engine: 3000 or lessSet Condition force is not detected for 3 seconds immediately af ter injectors
OK
NG
Measure at the injector connector Check the following connectors: lDisconnect the connector, and measure at the harnes s side.
SCAN TOOL Actuator test
10 relay (ASD relay) relay (ASD relay) is turned on and off every appro x. l Voltaae between 2 and around with the (ASD relay) on]
OK: Battery positive voltage Check the harness wire between the relay, (ASD and
the injector connector. Repair, if necessary.
Measure at the PCM connector
lDisconnect the connector and measure at the harness side.lDisconnect PCM connector and short terminal (67) of
the harness-side connector to ground.
l Voltage between 7 and ground
OK: Battery positive voltage Check the
between PCM and injector connector. Repair, if
OK
Check Repair
OK
Check trouble symptom.
NG
Replace the PCM.
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ENGINE (NON-TURBO)>
Scan tool 20
Injector C i r c u i tNo.
27
[Comment]l Open or shorted injector control Backgroundl Open injector
l Grounds for the injector circuits are provided by t he PCM.l (ASD) supply l Battery power is provided through the relay (ASD relay).
l Driver tailedlThis DTC is set if an open or short-circuit conditi on is detected in the control circuit the individual injector.
Range of Check
l Battery voltage: or morel relay (ASD relay): ON
l Engine: 3000 or lessSet Conditionl force is not detected for 3 seconds immediately af ter injectors
Measure at the injector connector lDisconnect the connector, and measure at the harnes s side.
SCAN TOOL Actuator test
10
relay (ASD relay)
l Voltage between 2 and ground
[Measure with the relay (ASD relay) on]
OK: Battery positive voltage
OK
Check the harness wire between the relay relay) and
the injector connector. Repair,
Measure at the PCM connector lDisconnect the connector, and measure at the harnes s side.lDisconnect PCM connector and short terminal (67) of
the harness-side connector to ground.
l Voltage between 17 and ground
OK: Battery positive voltage Check the following
Check the harness between PCM and injector if necessary.
OKNGCheck the following connector: Repair,
OK
Check trouble symptom.
N G
Replace the PCM.
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(NON-TURBO)>
Scan tool 21
Injector Control CircuitNo.
,
Probable cause
27
[Comment]l Open or shorted injector control Backgroundl O p e n i n j e c t o rl Grounds for the injector circuits are provided by t he PCM.
l voitage supply at injector
l Battery power is provided through the relay (ASD l ’ Driver in failed, , lThis DTC is set if an open or short-circuit conditi on is detected in the circuit for
the individual injector. ,
Range of Check
l Battery
or morel relay (ASD relay): ONl Engine: 3000 or less
Set Condition
l force is not detected for 3 seconds immediately af ter injectors . .
SCAN TOOL Actuator test
10 relay (ASD relay)
NG Repair the relay (ASD relay) circuit.
OK: The reiav sound can be heard.
NGCheck the injector. (Refer to Replace
OK
Measure at the injector connector lDisconnect the connector, and measure at the harnes s side.
SCAN TOOL Actuator test 10
relay (ASD relay) relay isturnedonandoff everyapprox. l between 2 and ground
[Measure with the relay (ASD relay) on]
OK: Battery positive
OK
Check the harness wire between the relay (ASD relay) and
the injector connector. Repair, if necessary.
Measure at the PCM connector
lDisconnect the connector, and measure at the harnes s side.lDisconnect PCM connector A-l 07 and short terminal (67) of
the harness-side connector to ground.
l
between 13 and ground
OK: Battery positive
Check the following connectors:
Check the harness between PCM and injector connecto r. if necessary.
OK
Check the following connector:
OK
NG Repair
Check trouble symptom.
NG
Replace the PCM.
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ENGINE (NON-TURBO)>
Scan tool 25
Code General scan tool
No. Air Control Motor Circuits
25,
[Comment]l Driver circuit shorted to groundBackgroundl Driver circuit shorted to batterylThe idle air stepper motor is used to prevent the engine from at
l shorted to togetheridle.l PCM failed
With the throttle plate completely placing a load on the engine (A/C or power l Shorted motor
steering operation) might cause the engine to stall or run rough.
lAs the PCM anticipates load, it operates the motor, opening the throttle bypass passageand allowing more air into the intake manifold.
l Malfunction of this system cause rough idle and emissions.lThe PCM cannot detect an open circuit or determine if the stepper motor is stuck in
one position.
Range of Check
l Battery
10 or more . .
l ignition switch: ON
Set Condition
lA short or open circuit condition is detected in a motor circuit for 3 seconds.
Check the idle air motor. (Refer to Replace
Check NG Repair
OK
Check trouble symptom.
N G
NG
harness wire between PCM and the Repair
Replace the PCM.
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