PREVOST H3-45 - Page 259

Multiplex Troubleshooting B-5
PA-1628Operator's ManualH3-45 COACH
Problem / Symptom Probable Causes Actions
Defroster fan is functioning
but no heat or cooling
available in the driver area.
Module AE47 is not powered or
is faulty
1. Check the DIAGNOSTICS menu of
Driver Information Display (DID).
Select VIEW ACTIVE FAULTS and
ELECTRICAL. The message “No
Response ModA47, Active” indicates a
power problem on the module. (A DL0
(BBUS MUX) network problem would
show the same message but doesn't
produce these symptoms).
2. Check / reset circuit breaker CB1
3. Check / replace fuse F45
4. Probe gray connector on module to see
if it is powered.
Low beam headlamps and
front flasher on left side not
functioning
Electric horn not functioning
Module AE46 is not powered or
is faulty
1. Check the DIAGNOSTICS menu of
Driver Information Display (DID).
Select VIEW ACTIVE FAULTS and
ELECTRICAL. The message “No
Response ModA46, Active” indicates a
power problem on the module. (A DL0
(BBUS MUX) network problem would
show the same message but doesn't
produce these symptoms).
2. Check / reset circuit breaker CB10
3. Check / replace fuse F19
4. Probe gray connector on module to see
if it is powered.
Low beam headlamps and
flasher on right side not
functioning
Module AE48 is not powered or
is faulty
1. Check the DIAGNOSTICS menu of
Driver Information Display (DID).
Select VIEW ACTIVE FAULTS and
ELECTRICAL. The message “No
Response ModA48, Active” indicates a
power problem on the module. (A DL0
(BBUS MUX) network problem would
show the same message but doesn't
produce these symptoms).
2. Check / reset circuit breaker CB10
3. Check / replace fuse F21
4. Probe gray connector on module to see
if it is powered.