Ignition Coil Check; Fuel Pump Check - Webasto DBW 2010 Service And Repair Manual

DBW 2010/2020/300 COOLANT HEATERS
6.2.4 I C C
GNITION OIL HECK
WARNING: In some cases, high tension
voltage of approx. 8,000 volts produced at
the ignition electrodes can be fatal.
CAUTION: Do not operate the ignition coil
without connection to the ignition
electrodes. Doing so will cause damage to
the ignition coil.
C
HECK
NOTE: Take care when connecting DC voltage
to the ignition coil leads. Connect positive to
the black lead and negative to the brown lead.
– Swing burner head open (see Sec. 8.5.1)
– Supply DC voltage to coil leads. Positive to black
lead and negative to brown lead.
– With ignition coil energized, an ignition spark will
jump the ignition electrodes.
A M
LTERNATE ETHOD USING
– Exchange control unit with tester and swing burner
head open (see Sec. 8.5.1).
– Press and hold the ignition button to activate the
ignition coil and observe spark condition.
CAUTION: Do not energize ignition coil for
a period longer than 15 seconds.
+ Black Wire
– Brown Wire
Figure 24: Ignition Coil Check
www.webasto.us
T (P/N 1302691A)
ESTER
FUNCTIONAL ADJUSTMENTS
6.2.5 F P C
UEL UMP
A pressure gauge and the tester P/N 1302691A is
required for performing this test. A suitable gauge with
a range from 0 to 15 bar (0 to 220 PSI) can be procured
from your authorized Webasto dealer.
NOTE: The fuel pump and the fuel hoses must
be replaced every 5 years.
C
HECK
– Exchange control unit with tester and swing burner
head open (see Sec. 8.5.1).
– Remove nozzle.
– Screw pressure test gauge into nozzle holder.
– Switch on heater motor via tester.
– Press fuel solenoid button on tester.
– Read pressure gauge. If adjustment is required,
release button and turn pump pressure screw 1/8 of
a turn at a time in or out to increase or decrease
pressure (see Fig. 10 for location of pressure screw).
– Repeat testing and adjustment steps until pressure is
within specified range.
– Switch off heater switch on tester.
– Unscrew pressure test gauge.
CAUTION: Do not damage nozzle bore.
– Screw in nozzle and torque to 20 Nm. (15 lb-ft)
DBW 2010 w/ 0.40 gph nozzle 8 –0.5 bar (116 –7 psi)
DBW 2010 w/ 0.35 gph nozzle 10 ±0.5 bar (145 ±7 psi)
DBW 2020 & DBW 300
Fuel Pump
+
-
Pressure
Regulator
Figure 25: Fuel Pressure Check
33
HECK
10 ±0.5 bar (145 ±7 psi)
Nozzle Holder
Pressure Test Gauge
P/N 600190
120
80
40
0
Gauge Face
Webasto Product N.A., Inc.
160
200
220