Section 08
ENGINE MANAGEMENT (4-TEC)
Subsection 03
(COMPONENT INSPECTION AND ADJUSTMENT)
08-03-24
SMR2003_027 _08_03A.FM
COOLANT TEMPERATURE
SENSOR (CTS)
1. Coolant temperature sensor (CTS)
Resistance Test
Disconnect the connector from the CTS and check
the resistance of the sensor itself.
The resistance should be between 2280
Ω
and
2740
Ω
at 20°C (68°F).
Otherwise, replace the CTS.
If resistance tests good,
reconnect
the CTS and
disconnect the EMS ECU connector A on the EMS
ECU.
Using a multimeter, recheck resistance value be-
tween terminals 11 and 27.
If resistance value is correct, try a new EMS ECU.
Refer to EMS ECU REPLACEMENT procedures
elsewhere in this section.
If resistance value is incorrect, repair the connec-
tors or replace the wiring harness between EMS
ECU connector and the CTS.
Replacement
Unlock expansion tank and temporarily move
away to gain access.
Remove the fuel rail cover.
Disconnect CTS connector and remove CTS.
Install the new CTS and torque to 18 N•m
(159 lbf•
in
).
Reinstall remaining removed parts.
MANIFOLD AIR PRESSURE
SENSOR (MAPS)
IMPORTANT:
Never mix up MAPS of normally-as-
pirated and supercharged 4-TEC engines. Doing so
will automatically lead to a misfunction of the EMS
ECU and will cause a bad engine calibration.
TYPICAL
1. Manifold air pressure sensor (MAPS)
NOTE:
This sensor is a dual function device. When
engine is started and it runs at idle speed, the sen-
sor takes the atmospheric pressure and stores it in
the EMS ECU. Thereafter, it takes the manifold air
pressure at operating RPMs.
Ensure sensor is correctly installed on intake man-
ifold. Otherwise, the MAPS could generate a fault
code for an unexpected sensor range at idle when
it reads the atmospheric pressure. Remove sensor
and check for oil or dirt on its end and if problem
persists, check throttle plate condition/position
and the wiring harness. Perform the following
tests.
1
R1503motr172A
R1503motr187A
11
27
1
R1503motr173A
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Содержание 2003 GTI LE RFI
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Страница 775: ...F00Z0F 2003 GTX 4 TEC MODEL WARNING www SeaDooManuals net ...
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