Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 75

13D-10
FAIL-SAFE FUNCTION REFERENCE TABLE
When the main sensor malfunctions are detected by the diagnosis function, the vehicle is controlled
by means of the pre-set control logic to maintain safe conditions for driving.
Malfunctioning item
Air flow sensor
Intake air temperature
sensor
Throttle position
sensor (TPS)
Engine coolant
temperature sensor
Camshaft position
sensor
Barometric pressure
sensor
Detonation sensor
Ignition coil, power
transistor
Oxygen sensor
Communication wire
with transmission
control unit <A/T>
Alternator FR terminal
MPI -
Control contents during malfunction
1. Uses the throttle position sensor signal and engine speed signal (crank angle sensor
signal) to take reading of the basic injector drive time and basic ignition timing from
the pre-set mapping.
2. Fixes the ISC servo in the appointed position so idle control is not performed.
Controls as if the intake air temperature is 25_C.
No increase in fuel injection amount during acceleration due to the throttle position sensor
signal.
Controls as if the engine coolant temperature is 80_C.
Injects fuel to all cylinders simultaneously.
(However, after the ignition switch is turned to ON, the No. 1 cylinder top dead centre is not
detected at all.)
Controls as if the barometric pressure is 101 kPa.
Switches the ignition timing from ignition timing for super petrol to ignition timing for standard
petrol.
Cuts off the fuel supply to cylinders with an abnormal ignition.
Air/fuel ratio feedback control (closed loop control) is not performed.
Ignition timing is not retarded during transmission gear shifting (overall engine and
transmission control).
Does not control the output of the alternator according to an electrical load. (works as a
normal alternator)
Troubleshooting