Introduction
The engine control system on the diavel uses a sensor that measures the temperature of the coolant (engine temperature). This sensor has a resistance of ntc type (negative temperature coefficient), that reduces its own value when the temperature increases. The engine temperature sensor, allows the control unit to manage correctly the cold starting and the heating phases.
Components assembling position
The engine temperature sensor is mounted on the left hand side of the vertical cylinder.
Location of engine temperature sensor connector.
Wiring diagram
Ccm engine control connection, s engine temperature sensor. 1 Green/white - g/w, 2 black/purple - bk/v.
In the event of fault
In the event of an engine temperature sensor fault, the engine control unit implements a recovery value of 70C and activates the radiator fans.
Fault codes generated and possible correlated faults
Fault codes generated by the engine control unit and displayed by the dds (engine temperature sensor diagnosis):
Note
Check integrity of electric circuit - short-circuit to vdc = with dashboard on, using a voltmeter, a voltage is measured between the wire tested and ground.
Check integrity of electric circuit - short-circuit to ground = with the battery cables disconnected, using an ohmmeter, continuity is detected between the wire tested and ground.
Check integrity of electric circuit - open circuit = with the battery cables disconnected, using an ohmmeter, no continuity is detected between the two ends of the wire tested.
The tank dashboard shows the error "engine temperature" and the eobd warning light activates.
When the dashboard receives the "engine temperature" error, flashing dashes are displayed instead of the temperature reading. If the dashboard does not receive engine temperature information from the can line, the error "engine temperature" is not shown on the display, but flashing dashes are still displayed instead of the temperature reading.
Possible correlated faults: inadequate engine power, irregular idle speed (target idle speed is 1350 rpm with engine stabilised at operating temperature), the engine does not start easily, radiator fans not activated correctly or not activated at all, causing the coolant to reach boiling point.
Check:
The engine temperature value may be checked using the dds. Check that the value given is plausible.
If none of the aforementioned tests identify the problem and the engine temperature sensor is in proper working order, replace the engine control unit.
component replacement methods
No special measures are necessary in order to replace the engine temperature sensor. After replacement of the engine temperature sensor, reset the self-adaptive parameters relative to carburation with the dds.
Lh switch
Dip switch, light dip switch, two positions (fig. 89):
(A) every time pressed down light switches from low
beam on to low beam and high beam
on .
(B) pushed to the side = high
beam flasher (flash),
"start-stop lap" function.
Button = three-position turn
indicator ...
Specific tools for the engine
88713.2011.Tool to lock crankshaft at top dead centre
88713.2676 .Wrench for tightening cylinder head nuts
88713.2103 Stand for cylinder head assembly
88765.1657 Timing check tool
88713.1821 Wrench for tightening timing belt tensioner pulley shafts
88713.2861 Camshaft oi ...
Removal of the engine
In order to remove engine you must first remove a series of other components
from the motorcycle.
Most of these removal procedures are described in the relative sections of this
manual.
The following flow chart illustrates the logical sequence in which the parts are
to be removed from th ...