FUEL SYSTEM <DOHC>
On-Vehicle Inspection of
Components
TROUBLESHOOTING HINTS
Hint 1:
The
signals
of the
throttle-position sensor are more
important for control of the automatic transaxle than
for control of the engine; shifting “impact shocks”
are produced if there is a malfunction of the
throttle-position sensor.
INSPECTION
Using Scan tool
Hint 2:
If
the voltage of the throttle-position sensor deviates
from the standard value, check once again after
making the throttle-position sensor adjustment.
addition, if there are any indications that the fixed
SAS has been moved, adjust the
fixed SAS.
Function
Data reading
No.
Data display
14
Sensor de-
tection vol-
tage
HARNESS INSPECTION
connector
Harness side
connector
Inspection conditions
Throttle valve
Standard value
Ignition switch: ON
To idle position
Gradually opening
Becomes higher
proportional to
valve opening.
To fully open
Measure the power supply voltage of
the TPS.
. Connector: Disconnected
. Ignition switch: ON
Check for continuity of the ground
circuit of the TPS.
. Connector: Disconnected
Repair the
harness.
for an open-circuit, or a
to ground, between the
module and the throttle
tion sensor.
. Throttle position sensor
Disconnected
I
-
Engine. control module connec-
tor: Disconnected
Repair
harness.
TSB Revision
Summary of Contents for 1989 Galant
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