Operation Manual

159MS 241 C
The black lead of the handle heating
must be routed underneath the gray
lead of the wiring harness.
: Press the leads of the handle
heating and the wiring harness
into the guide (arrows)
– Reassemble remaining parts in
reverse order
14.6 Heating element in front
handle
The heating element in the front
handle cannot be replaced. In case
of damage, the complete front
handle must be replaced.
Check heating element
– Remove the handle molding,
b 11.2
The functioning of the heating
element in the front handle can be
checked simply using the following
test procedure.
– Disconnect the plug connections
of the heating element at the
handle
Carry out measurement between
the two socket terminals and the
contact sleeve.
– Set heating switch to F
2410RA399 TG
: Clip one test lead to the terminal
socket (1) of the thick connecting
lead and the second to the
contact sleeve of the heating
switch
If the heating element is intact, the
ohmmeter will indicate a value
of approx. 6.4 Ω
(reading 6.0...8.0 Ω) in the
measuring range "Ω".
If the reading obtained is outside
this tolerance, then the front
handle (front handle heating
element) must be checked directly
at the connecting leads.
– Disconnect plug connections at
the front handle, b 10.4.1
: Clip test leads to the
connectors of the leads (1)
and (2)
If the heating element is intact, the
ohmmeter will indicate a value
of approx. 6.4 Ω
(reading 6.0...8.0 Ω) in the
measuring range "Ω".
100
50
30
20
10
5
0
20
10
5
2410RA400 TG
1
00
50
30
20
10
5
2410RA404 TG
2
1
If the reading obtained is outside
this tolerance, then the front
handle (front handle heating
element) must be replaced,
b 10.4.1.
Is the heating element inoperable
despite a successful resistance
measurement?
– Remove and examine
connecting lead to front handle
heating element, replace if
necessary, b 14.9
– Examine wiring harness, replace
if necessary, b 14.3, b 14.8
– Test generator and heating
switch, replace if necessary,
b 14.7, b 14.4
– Reassemble parts in reverse
order