FUEL SYSTEM
VALVE> Troubleshooting
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 according to the preset control logic.
Trouble item
Control content for trouble
Volume air flow
(1) Fuel injection timing and ignition timing are determined according to the throttle
position
sensor
sensor (TPS) and engine revolution speed signal (crankshaft position
sensor signal).
(2) The
motor is fixed in the appointed position so idle air control is not performed.
Intake air temperature
The control is executed with the suction air temperature regarded as
sensor
Throttle position
The fuel injection rate is not increased for acceleration according to the throttle position
sensor (TPS)
sensor signal.
Engine coolant
The control is executed with the coolant temperature regarded as
temperature sensor
Camshaft position
Simultaneous injection of fuel is executed for all cylinders. (In this case, the
cylinder
dead center is not detected at all after the ignition key is turned
on.)
pressure
The control is executed with the pressure regarded as 760
(30 in. Hg.).
AC valve position
Idle air control motor is not performed.
sensor
Closed loop control of the air/fuel mixture ratio is not executed.
READ OUT OF DIAGNOSTIC TROUBLE CODE
Refer to
MEMORY OF DIAGNOSTIC TROUBLE
Refer to
TSB Revision
Summary of Contents for 1989 Galant
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