PREVOST H3-45 VIP Owner's Manual page 238

B-6 Multiplex Troubleshooting
Problem / Symptom
Rear flashers not
functioning
Stoplights and center
stoplights not functioning
Engine is overheating and
radiator fans do
engage
The A/C compressor
clutch does not engage
Probable Causes
Module AE51 is not powered
or is faulty
Module AE52 or AE49 is not
not powered or is faulty
Module AE54 (or AE52) is not
powered or is faulty
PA-1619 Owner's Manual H3-45 VIP
Actions
1. Check the DIAGNOSTICS menu of
Driver Information
Select VIEW ACTIVE FAULTS and
ELECTRICAL. The
Response ModA51, Active" indicates a
power problem on the module. (A DL0
(BBUS MUX) network problem would
show the same message but doesn't
produce this symptom).
2. Check / reset circuit breaker CB8
3. Check / replace fuse F107
4. Probe gray connector on module to see
if it is powered.
1. Check the DIAGNOSTICS menu of
Driver Information
Select VIEW ACTIVE FAULTS and
ELECTRICAL. The
Response ModA52/ ModA49, Active"
indicates a power problem on the
module. (A DL0 (BBUS MUX) network
problem would
message but doesn't produce this
symptom).
2. Check circuit breaker CB5
3. Check / replace fuse F133, F134
4. CB201-CB208
1. Check the DIAGNOSTICS menu of
Driver Information
Select VIEW ACTIVE FAULTS and
ELECTRICAL. The
Response ModA54, Active" indicates a
power problem on the module. (A DL0
(BBUS MUX) network problem would
show the same message but doesn't
produce this symptom).
2. Check / reset circuit breaker CB5
3. Check / replace fuse F135
4. Probe gray connector on module to see
if it is powered.
Display (DID).
message "No
Display (DID).
message "No
show the same
Display (DID).
message "No