APRILIA RSV4 RR 2017 Service Station Manual page 162

Electrical system
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Example value with key ON: -40° C
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Example value with engine on: 25° C
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The value of the engine start-up temperature is saved. At key ON, the value -40°C is read.
CAUTION
BEFORE CARRYING OUT ANY TROUBLESHOOTING, CAREFULLY READ THE GENERAL TROU-
BLESHOOTING CONCEPTS FOR ELECTRICAL DEVICES AT THE BEGINNING OF THE CHECK
AND CONTROL SECTION IN THE ELECTRICAL SYSTEM CHAPTER.
DIAGNOSTIC TOOL: ELECTRICAL ERRORS
P0115 Engine temperature sensor
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open circuit, shorted to positive / shorted to negative.
Error cause
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If open circuit, short circuit to positive: an excessive voltage was detected at PIN 12 of the
ENGINE connector. If short circuit to negative: voltage equal to zero has been detected. The
instrument panel indicates this error by lighting up in a fixed manner the MI warning light.
Troubleshooting
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If open circuit, short circuit 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 OK,
check continuity between the ENGINE connector PIN 12 and the sensor PIN 3: If continuity
is absent, restore the wiring harness; if ok reconnect the control unit connector and with key
ON check the continuity between PIN 1 of the sensor connector and vehicle ground: if OK,
it means that the error is caused by the cable being shorted to positive and it is necessary
to restore the cable harness between ENGINE PIN 12 and sensor PIN 3; if there is no
continuity to ground, check the sensor connector and the Marelli control unit connector. If
not OK, restore the cable harness. If OK, check for continuity between the ENGINE con-
nector PIN 6 or 17 and the sensor connector PIN 1: 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 short circuit to negative, check the correct resistance of the sensor: if resistance is null,
replace the sensor; if resistance is correct, it means that the Yellow/Brown cable has ground
connection: restore the cable harness
DIAGNOSTIC TOOL: LOGIC ERRORS
P0116 Engine temperature sensor
Signal not plausible.
Error cause
•
An excessive temperature variation was detected: the cause could be a contact resistance
between the terminals, for example. The instrument panel indicates this error by lighting up
in a fixed manner the MI warning light.
ELE SYS - 162
RSV4 RR-RF