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If the circuit is open, shorted to positive: excessive voltage has been detected at PIN 5 of
connector A (BROWN). If shorted to negative: voltage equal to zero has been detected. In
both cases, recovery function.
Troubleshooting
•
If the circuit is open, shorted to positive: check the sensor connector and the Marelli control
unit connector. If they are OK, check sensor continuity: replace the sensor if not OK; if it is
OK, check the continuity between PIN 5 of the connector A (BROWN) and sensor PIN 1:
restore cable harness if there is no continuity; if it is OK, reconnect the control unit connector
and, with key set to key ON, check the continuity between the sensor connector PIN 2 and
the vehicle ground connection: if it is OK, it means that the error cause is that the cable is
shorted to positive and it is necessary to restore the cable harness between ENGINE PIN
5 and sensor PIN 1; if there is not continuity with the ground lead, check the sensor connector
and the Marelli control unit connector; if they are not OK, restore the cable harness; if they
are OK, check continuity between PIN 20 of the connector A (BROWN) and PIN 2 of the
sensor connector: restore the cable harness if there is not continuity. If there is, it means
that the control unit does not supply the ground connection and therefore should be replaced.
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If shorted to negative, check sensor correct resistance: if resistance is null, replace the sen-
sor; if resistance is correct, it means that the cable has ground connection: restore the cable
harness.
NOTES
No error is detected if the sensor does not work correctly or the control unit connector
or sensor terminals are rusty: then check through Navigator if the temperature indicated is the
same as the engine temperature. Check also that the sensor electrical characteristics are ob-
served: replace the sensor if not OK; if it is OK, check the sensor connector and the Marelli
control unit connector
Air temperature sensor
INTAKE AIR TEMPERATURE SENSOR
Function
It tells the control unit the intake air temperature in
order to calculate oxygen presence so as to opti-
mise the petrol quantity necessary for correct com-
bustion.
Operation / Operating principle
NTC type sensor (resistance sensor, inversely
variable with temperature).
Level in wiring diagram:
Temperature sensors
Location:
Electrical system
MSS Mana GT ABS
ELE SYS - 96
Содержание MSS Mana GT ABS
Страница 1: ...SERVICE STATION MANUAL 894171 MSS Mana GT ABS ...
Страница 5: ...INDEX OF TOPICS CHARACTERISTICS CHAR ...
Страница 26: ...INDEX OF TOPICS SPECIAL TOOLS S TOOLS ...
Страница 38: ...Stores code Description 020881Y Panel graphics Special tools MSS Mana GT ABS S TOOLS 38 ...
Страница 39: ...INDEX OF TOPICS MAINTENANCE MAIN ...
Страница 46: ...INDEX OF TOPICS TROUBLESHOOTING TROUBL ...
Страница 57: ...INDEX OF TOPICS ELECTRICAL SYSTEM ELE SYS ...
Страница 149: ...INDEX OF TOPICS ENGINE FROM VEHICLE ENG VE ...
Страница 164: ...Engine from vehicle MSS Mana GT ABS ENG VE 164 ...
Страница 165: ...INDEX OF TOPICS ENGINE ENG ...
Страница 177: ...Removing the intake manifold Remove the coolant pipes Undo the six fixing screws MSS Mana GT ABS Engine ENG 177 ...
Страница 220: ... Remove the tip Specific tooling 020664Y Flywheel side crankshaft fitting tip Engine MSS Mana GT ABS ENG 220 ...
Страница 230: ... Undo the two screws and remove the oil pump cover Engine MSS Mana GT ABS ENG 230 ...
Страница 266: ...INDEX OF TOPICS POWER SUPPLY P SUPP ...
Страница 268: ...Power supply MSS Mana GT ABS P SUPP 268 ...
Страница 269: ...MSS Mana GT ABS Power supply P SUPP 269 ...
Страница 270: ...INDEX OF TOPICS SUSPENSIONS SUSP ...
Страница 314: ...INDEX OF TOPICS CHASSIS CHAS ...
Страница 320: ...INDEX OF TOPICS BRAKING SYSTEM BRAK SYS ...
Страница 347: ...INDEX OF TOPICS COOLING SYSTEM COOL SYS ...
Страница 362: ...INDEX OF TOPICS BODYWORK BODYW ...
Страница 388: ...INDEX OF TOPICS PRE DELIVERY PRE DE ...