Mitsubishi 1989-1993 GALANT Service Manual page 196

FUEL SYSTEM <SOHC-8 VALVE>
TROUBLESHOOTING HINTS
Hint 1:
If there is a malfunction of the barometric-pressure
the vehicle will become worse
sensor, driveability of
INSPECTION
Using Scan tool
Item No.
Function
25
Data reading
HARNESS INSPECTION
connector L,?
Harness side
connector
Data display Check conditions
Sensor detec- Ignition switch: ON
tion pressure
Check for continuity of the ground
circuit.
. Connector: Disconnected
Measure the power supply voltage of
the barometric oressure sensor.
. Connector: Disconnected
. Ignition switch: ON
Engine control
Check for an open-circuit or a short-
module harness
circuit to ground between the engine
side connector
control module and the barometric
pressure sensor.
Disconnected
Engine control module connec-
tor: Disconnected
Hint 2:
If, during high-speed driving, there is a noticeable
s h a r p d r o p o f t h e d i s p l a y e d p r e s s u r e o f t h e
the air cleaner.
At 0 m (0 ft.)
At 600 m
At 1,200 m
(3,937 ft.)
At 1,800 m
(5,906 ft.)
Standard value
I
760 mmHg
710 mmHg
I
660 mmHg
610 mmHg
Repair the
harness.
Repair the
harness.