XA(S)175 Dd
28
6.
PROBLEM SOLVING
6.1
P
ROBLEM SOLVING CHART
The chart helps to solve mechanical and electrical problems.
It is assumed that the engine is in good condition and that
there is adequate fuel flow to the filter and injection
equipment.
An electrical fault must be traced by an electrician.
Make sure that the wires are not damaged and that they are
clamped tight to their terminals.
6.2
A
LTERNATOR PRECAUTIONS
1. Never reverse the polarity of the battery or the alternator.
2. Never disconnect any alternator or battery connections
while the engine is running.
3. When recharging the battery, disconnect it from the
alternator. Before using booster cables to start the engine,
be sure of the polarity and connect the batteries correctly.
4. Never operate the engine without the main or voltage
sensing cables connected in the circuit.
Problem
1. Lamps (H1, H6) do not
light up when switching
(S1) to ”I”.
2. Alarm lamp (H1) does
not light up when
switching (S1) to ”I”;
lamp (H6) lights up.
3. Lamp (H6) does not light
up when switching (S1)
to ”I”, lamp (H1) lights
up.
4. Starter motor does not
crank engine after
switching (S1) to ”I” and
depressing (S2).
Possible faults
a. Discharged or defective battery.
b. Loose battery cable(s) or oxidised
terminals.
c. Loose connection or damaged wiring.
d. Switch (S1) defective.
e. Circuit breaker (F1) defective.
a. Lamp (H1) blown.
b. Alternator/regulator defective.
a. Lamp (H6) blown.
b. See fault 1d.
a. Low battery output.
b. Start switch (S2) defective.
c. Alternator output relay (K6) defective.
d. Start solenoid (K0) or starter motor
defective.
Corrective actions
a. Check electrolyte level and charge
battery. If no cells are shorted and battery
is discharged, trace cause and correct.
b. Check and correct as necessary.
c. Check wiring and connections, correct as
necessary.
d. With (S1) switched in ”I”, check voltage
between earth and respectively each of
the terminals of (S1), Voltage must
register at each of the terminals;
if not, replace (S1).
e. Replace circuit breaker.
a. Replace lamp.
b. Disconnect the wire from alternator
terminal D+ and connect it to terminal D-.
If (H1) lights up, replace the alternator;
if not, test (S1); see remedy 1d.
a. Replace lamp.
b. See remedy 1d.
a. See remedy 1a.
b. With (S1) in ”I” and (S2) depressed,
check voltage between earth and
respectively each of the terminals of (S2).
Voltage must register at each of the
terminals; if not, replace (S2).
c. Replace (K6).
d. Check start solenoid (K0). Have starter
motor repaired.
Summary of Contents for XAS 175 Dd
Page 2: ...XA S 175 Dd 2 ...
