Mitsubishi 1989-1993 GALANT Service Manual page 157

FUEL SYSTEM <SOHC-8 VALVE>
Diagnosti On-board
trouble diagnostic
code No. item
24 Vehicle During acceleration of engine
speed revolution speed of 3,000 rpm
or more, the signal voltage of
sensor
(reed the vehicle speed sensor doe:
switch) not vary (to be high/low).
(1) The signal voltage of the
25
(2) The signal voltage of the
Injector is not continuously
41
driven for 4 seconds during
engine cranking or idle
operation.
The engine runs but power to
42
43
1) The EGR amount is small.
2) The signal voltage of the
Diagnostic content
barometric pressure
sensor is 4.5V or higher.
barometric pressure
sensor is 0.2V or lower.
(The signal voltage of the
EGR temperature sensor
is excessively high.)
EGR temperature sensor
is 0.1 V or less.
TSB Revision
Major cause
(1) The vehicle speed sensor is
troubled.
(2) Open-circuit, short-circuit or
improper connector contact
occurs in the vehicle speed
sensor circuit.
(3) The engine control module is
troubled.
1) The barometric pressure sense
is troubled.
2) Open-circuit, short-circuit or
improper connector contact
occurs in the barometric
pressure sensor circuit.
'3) The engine control module is
troubled.
'1) The injector is troubled.
improper connector contact
occurs in the injector sensor
circuit.
troubled.
improper connector contact
occurs in the fuel pump power
supply circuit.
(2) The multiport fuel injection
relay is troubled.
(3) The engine control module is
troubled.
(1) The EGR valve is not opened.
(2) The negative pressure of the
EGR valve control is excessively
(3) ?h"e EGR solenoid is troubled.
(4) The EGR temperature sensor is
troubled.
(5) Open-circuit, short-circuit or
improper connector contact
occurs in the EGR temperature
sensor circuit.
(6) The engine control module is
troubled.
I
Remarks (trouble
phenomenon, etc.)
The engine
sometimes cuts off
when stopping afte
deceleration.
Unstable idling*
l
Improper
l
acceleration*
Unstable idling
l
acceleration
Impossible start
l
exhaust gas
,
purifying
performance