1989 MITSUBISHI GALANT air condition

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Page 341 of 1273

MITSUBISHI GALANT 1989 Service Repair Manual FUEL SYSTEM <DOHC> - General Information
<California-Non-Turbo From 1992 models>
*1 Heated oxygen sensor *2 Volume air flow sensor
‘3 Intake air temperature
sensor *4
Throttle position sensor
‘5

Page 342 of 1273

MITSUBISHI GALANT 1989 Service Repair Manual 13-200FUEL SYSTEM <DOHC> - General Information
<Federal-Turbo
>
*l Heated oxygen sensor‘2 Volume air flow sensor*3 Intake air temperaturesensor‘4 Throttle position sensor‘5 Closed throttle posi

Page 343 of 1273

MITSUBISHI GALANT 1989 Service Repair Manual FUEL SYSTEM <DOHC> -General Information/Specifications 13-201
<California-Turbo>
I-
‘1 Heated oxygen sensor
‘2 Volume air flow sensor‘3 Intake arr temperature
sensor
‘4 Throttle position senso

Page 345 of 1273

MITSUBISHI GALANT 1989 Service Repair Manual FUEL SYSTEM <DOHC> - Specifications13-203
iERVlCE SPECIFICATIONS
Items
Basic ignition timing
Curb idle speed rpm
Idling rpm when air conditioning ON
vm
<M/T>
<AA>
Basic idle speedrm
Throttle position

Page 348 of 1273

MITSUBISHI GALANT 1989 Service Repair Manual 13-206FUEL SYSTEM <DOHC> - Troubleshooting
ON-BOARD DIAGNOSTIC
The engine control module monitors the input/out- put signals (some signals at all times and the others
under specified conditions) of th

13-206FUEL SYSTEM - Troubleshooting
ON-BOARD DIAGNOSTIC
The engine control module monitors the input/out- put signals (some signals at all times and the others
under specified conditions) of the engine control
module.
When it is noticed that an irregularity has continued
for a specified time or longer from when the irregu- lar signal is initially monitored, passing a certain
number, the engine control module judges that an
irregularity has occurred, memorizes the diagnostic
trouble code, and outputs the signal to the on-board diagnostic output terminal.
There are 16 on-board diagnostic items, including
the normal state, and the diagnostic results can be read out with a voltmeter or scan tool.
Moreover, since memorization of the diagnostic
trouble codes is backed up directly by the battery,
the diagnostic results are memorized even if the ig- nition key is turned off. The diagnostic trouble
codes will, however, be erased when the battery
terminal or the engine control module connector is
DIAGNOSTIC CHART (FAULT TREE) disconnected. In addition, beginning with the engine
control module of 1990 and later models, the diag- nostic trouble code are erased by turning on the ig-
nition switch and sending the diagnostic trouble
code erase signal from the scan tool to the engine
control module.
Caution If the sensor connector is disconnected with
the ignition switch turned on, the diagnostic
trouble code is memorized. In this case, send
the diagnostic trouble code erase signal from
the scan tool to the engine control module or disconnect the battery terminal
(-) for 10 sec-
onds or more, and the diagnosis memory will be erased.
The 16 on-board diagnostic items are provided as
follows, and if plural items are activated, they are all indicated sequentially from the smallest code num-
ber. ti0.
Diagnostic trouble code
Output signal pattern
On-boarddiagnostic
itemCheck item (Remedy)
-Engine (Replace engine control module)
control
H Imodule
L-
J
12A0104
Heatedoxygen
sensor
l Harness and connectorl Heated oxygen sensorl Fuel pressurel Injectors (Replace if defective.) 12A0104l Intake air leaks
12
13 12A0104Volume airl Harness and connector
flow sensor(If harness and connector are
normal, replace volume air flow
sensor assembly.)
Intake air
l Harness and connector
temperaturel intake air temperature sensorsensor 12A0104
Memory
Retained
Retained
Retained
TSB Revision

Page 353 of 1273

$MITSUBISHI GALANT 1989 Service Repair Manual FUEL SYSTEM <DOHC> - Troubleshooting13-211 FAILSAFE/BACK-UP FUNCTIONS LIST If trouble with any major sensor is detected by the on-board diagnostic,\ the vehicle will be kept in the safe driving cond$

FUEL SYSTEM - Troubleshooting13-211
FAILSAFE/BACK-UP FUNCTIONS LIST
If trouble with any major sensor is detected by the on-board diagnostic,\
the vehicle will be kept in the safe
driving conditions-accdrding
to the preset control
logic.
Trouble item
Volume air flow
sensor Control content for trouble
(1) Fuel injection timing and ignition timing are determined according\
to the throttle positior
sensor (TPS) and engine revolution speed signal (crankshaft position \
sensor signal).
(2) The idle air control motor is fixed at the specified position, and\
the idle revolution speec
control is not executed.
Intake air
temperature sensor The control is executed with the suction air temperature regarded as
25’C (77°F).
Throttle positron
sensor (TPS)The fuel injection rate is not increased for acceleration according to t\
he throttle positionsensor signal.
Engine coolant
temperature sensor The control IS executed with the engine coolant temperature regarded as 80°C
(176°F).(Even if the sensor signal becomes normal again, the control is continu\
ed until the ignition
switch is turned off.)
Camshaft position
sensor (1) Simultaneous injection of fuel is executed for all cylinders.
(In this case, the No.
1 cylinder top dead center is not detected at all after the ignition
key is turned on.)
(2) Fuel is cut 4 seconds after trouble is detected. (In this case, the No. 1 cylinder top dead center IS not detected at all after the ignition
key is turned on.)
Barometric pressure
sensor The control is executed with the pressure regarded as 760
mmHg (30 in.Hg.).
Knocksensor
The ignition timing is retarded further from the normal state, and ignit\
ion is executed even
when knocking does not occur.
Ignition coil, ignition
power transistor unitFuel is cut in the cylinder where the ignition signal is abnormal.
Heated oxygen sensor Closed loop control of the air/fuel mixture ratio is not executed.
TSB RevisionREAD OUT OF DIAGNOSTIC TROUBLE CODE
Refer to
P.13-16.
CLEAR MEMORY OF DIAGNOSTIC TROUBLE
CODE
Refer to P.13-17.

Page 360 of 1273

MITSUBISHI GALANT 1989 Service Repair Manual 13-218
FUEL SYSTEM <DOHC> - Troubleshooting
CIRCUIT DIAGRAM (CONTINUED)
< 1989 models>
A-40
I@
aI3IC-36
J/B
r
@
101
MFIRELAY
I
i-l
EGK
x
SOLENOID(VHEICLES FOFCALIFORNIA)
2
r
631
ii!.?
53c-10 ,
V
I FUS

Page 375 of 1273

MITSUBISHI GALANT 1989 Service Repair Manual FUEL SYSTEM <DOHC> - Troubleshootina
SUB FUSIBLE LIh
I
A-48
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z
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is
1
1
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x
SOLENOIDWHEICLES FORCALIFORNIA)
2
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r
A-07X
El3

4
IK
T
>
si
EFATEDA
AUTO COMPRESSOR
CONTROL UNIT
;E5

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