Mitsubishi Eclipse. Technical Information Manual (1994) - part 26

ENGINE   <TURBO>   -  Control  System

Item No.

Inspection item

General scan

Scan tool

tool mode

mode

59

Heated oxygen sensor (Rear)

X

X

81

Long term fuel trim - Bank 1

X

82

Short term fuel trim - Bank 1

X

87

Calculated load value

X

88

Fuel control state

X

-

95

Manifold differential pressure sensor

X

X

ACTUATOR TEST REFERENCE TABLE

N71BK73AA

Item No.

Inspection item

Drive contents

01

Cut fuel to No. 1 injector

02

 Injectors

Cut fuel to No. 2 injector

03

Cut fuel to No. 3 injector

04

Cut fuel to No. 4 injector

07

Fuel pump

FueLpump operates and fuel is recirculated.

08

Evaporative emission purge solenoid

Solenoid valve turns from OFF to ON.

09

Fuel pressure solenoid

Solenoid valve turns from OFF to ON.

10

EGR solenoid

Solenoid valve turns from OFF to ON.

12

Turbocharger waste gate solenoid

Solenoid valve turns from OFF to ON.

17

Basic ignition timing

Set to ignition timing adjustment mode

20

Radiator fan (Hi)

Condenser fan (Hi)

Drive the fan motors (radiator and condenser).

21

Radiator fan (Hi)

Condenser fan (Low)

Drive the fan motors (radiator and condenser).

ENGINE  <TURBO>  - Control Svstem

I-83

MAIN MONITORS

CATALYST MONITORING
(1) Monitoring method

l

Conversion efficiency is monitored on the

FTP (Federal Test Procedure) basis.

l

Calculate a frequency ratio 

 of output

signals, oscillating from lean to rich or vice
versa, from the front and rear 

 sensors

according to the following equation.

(2) Malfunction criteria

If 

 becomes larger than the predetermined

value, a catalyst malfunction is indicated.

Output signal frequency of rear 

 sensor

 

Output signal frequency of front 

 sensor

MISFIRE MONITORING

(1) Monitoring method

Fluctuation of crankshaft speed is monitored.

(2) Malfunction criteria

If the fluctuation of the crankshaft rotation is
larger than the predetermined value, an engine
misfire is indicated.

But the determination of misfire is masked under

some conditions like rough-road driving to avoid
false diagnostic trouble codes.

(3) System figure

Damper

pul

Crank sprocket

ENGINE <TURBO>   Control System

OXYGEN SENSOR MONITORING
(1) Monitoring method

Detect the response time of front 

 sensor

output signals when air-fuel ratio is changed

intentionally from lean to rich or rich to lean
under the hot steady state condition.

EGR SYSTEM MONITORING
(1) Monitoring method

Operate EGR valve intentionally in the area
of deceleration and detect the change of the

EGR gas flow signal.

FUEL SYSTEM MONITORING
(1) Monitoring method

l

A/F feedback compensation value is moni-
tored.

OTHER SYSTEM MONITORS

(2) Malfunction criteria

If the response time value is larger than the

predetermined value, an 

 sensor malfunction

is indicated.

(2) Malfunction criteria

If the change of the EGR gas flow signal is

smaller than the predetermined value, an EGR
system malfunction is indicated.

(2) Malfunction criteria

If the A/F feedback compensation value is larger

than the predetermined value, an fuel system

malfunction is indicated.

(1) Refer to Group, 13 

Troubleshooting in the Service manual.

ENGINE <TURBO> 

 

 Electrical   Emission Control System

 

The generator, starter motor and ignition system
are basically the same as the current ones.

 

 

GENERAL INFORMATION

l 

The manifold pressure sensor is adopted to

monitor the EGR system.

 

l 

Other features of the system are essentially

the same as the ones of the current system.

Purge control valve

Evaporative
emission
canister

Air cleaner

I

Air inlet 

Turbocharger

gate solenoid

 emission

 

Heated oxygen
sensor (rear)

Heated oxygen
sensor (front)