FUEL SYSTEM
VALVE>
Troubleshooting
at sensor side
Check engine/malfunction
indicator lamp
l
If the voltage (power-supply voltage) supplied to a sensor
is not normal, repair the harness.
If the voltage to the sensor is still not normal after the har-
ness has been repaired, repalce the engine control module
and check again.
ENGINE/MALFUNCTION INDICATOR
Among the on-board diagnostic items, a check
function indicator lamp comes on to notify the driver of the
emission control items when an irregurality is detected.
However, when an irregular signal returns to normal and the
engine control module judges that it has returned to normal,
the check engine/malfunction indicator lamp goes out.
Moreover, when the ignition switch is turned off, the light goes
out. Even if the ignition switch is turned on again, the light does
not come on until the irregularity is detected.
Here, immediately after the ignition switch is turn on, the
check engine/malfunction indicator lamp is lit for 5 seconds to
indicate that the check engine/malfunction indicator lamp op-
erates normally.
ITEMS INDICATED BY THE CHECK ENGINE/
MALFUNCTION INDICATOR LAMP
control module
xvaen sensor
I
Volume air flow sensor
I
Intake air temperature sensor
Throttle
position
sensor
Engine coolant temperature sensor
speed control motor position sensor
Crankshaft position sensor
Camshaft position sensor
Barometric
sensor
Injector
Fuel pump
EGR
<California>
CHECK ENGINE/MALFUNCTION INDICATOR LAMP
INSPECTION
(1) Check to be sure, when the ignition switch is set to the
“ON” position, that the lamp illuminates for about five sec-
onds and then switches OFF.
(2) If the lamp does not illuminate, check for damage or dis-
connection of the harness, or for a blown fuse or a failed
light bulb.
TSB Revision
Summary of Contents for 1989 Galant
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