Fuel System (Sohc 16 Valve) Failsafe/Back-Up Functions List - Mitsubishi 1989-1993 GALANT Service Manual

FUEL SYSTEM <SOHC-16 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
sensor
(2) The IAC 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 25°C (77°F).
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 80°C (176'F).
temperature sensor
Simultaneous injection of fuel is executed for all cylinders. (In this case, the No.1 cylinder top
Camshaft position
dead center is not detected at all after the ignition key is turned
The control is executed with the pressure regarded as 760 mmHg (30 in. Hg.).
AC valve position Idle air control motor is not performed.
Closed loop control of the air/fuel mixture ratio is not executed.
sensor (TPS) and engine revolution speed signal (crankshaft position
READ OUT OF DIAGNOSTIC TROUBLE CODE
Refer to P.13-16.
Refer to P.13-17.
TSB Revision
position
sensor signal).
on.)