Mitsubishi MOTORS Lancer 2005, Workshop Manual Supplement

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MPI <4G63>
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Troubleshooting
13D-11
METHOD OF READING AND ERASING DIAGNOSIS
CODES
Refer to GROUP 00
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How to Use Troubleshooting/Inspection
Service Points.
INSPECTION USING M.U.T.-
II/III
DATA LIST AND
ACTUATOR TESTING
1. Carry out inspection by means of the data list and the
actuator test function. If there is an abnormality, check
and repair the chassis harnesses and components.
2. After repairing, re-check using the M.U.T.-
II/III
and check
that the abnormal input and output have returned to normal
as a result of the repairs.
3. Erase the diagnosis code memory.
4. Remove the M.U.T.-
II/III
, and then start the engine again
and carry out a road test to confirm that the problem
has disappeared.
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 Control contents during malfunction
Air flow sensor 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.
Intake air temperature
sensor Controls as if the intake air temperature is 25
_
C.
Throttle position
sensor (TPS) No increase in fuel injection amount during acceleration due to the throttle position sensor
signal.
Engine coolant
temperature sensor Controls as if the engine coolant temperature is 80 _ C.
Camshaft position
sensor Injects fuel into the cylinders in the order 1-3-4-2 with irregular timing.
(However, after the ignition switch is turned to ON, the No. 1 cylinder top dead centre is not
detected at all.)
Barometric pressure
sensor Controls as if the barometric pressure is 101 kPa.
Detonation sensor Switches the ignition timing from ignition timing for super petrol to ignition timing for standard
petrol.
Ignition coil, power
transistor Cuts off the fuel supply to cylinders with an abnormal ignition.
Alternator FR terminal Does not control the output of the alternator according to an electrical load. (works as a
normal alternator)