PREVOST X3-45 2017, Operator'S Manual

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Appendix B – Troubleshooting Guide for Multiplex Vehicles
PA1627 X3-45 Operator’s Manual
4
Problem/Symptom Probable Causes Actions
3. Check / replace fuse F21
4. Probe gray connector on module to
see if it is powered.
Rear flashers not
functioning
Stoplights and center
stoplights not functioning
Module AE51 is not powered
or is faulty 1. Check the SYSTEM DIAGNOSTIC
menu of Driver Information Display
(DID). Select FAULT DIAGNOSTIC
and ELECTRICAL SYSTEM. The
message “No Response ModA51,
Active” indicates a power problem on
the module. (A CAN 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.
Engine is overheating and
radiator fans do not
engage Module AE52 or AE49 is not
powered or is faulty 1. Check the SYSTEM DIAGNOSTIC
menu of Driver Information Display
(DID). Select FAULT DIAGNOSTIC
and ELECTRICAL SYSTEM. The
message “No Response ModA52/
ModA49, Active” indicates a power
problem on the module. (A CAN
network problem would show the
same message but doesn't produce
this symptom).
2. Check circuit breaker CB5
3. Check / replace fuse F133, F134
4. CB201-CB208
The A/C compressor
clutch does not engage Module AE54 is not powered
or is faulty 1. Check the SYSTEM DIAGNOSTIC
menu of Driver Information Display
(DID). Select FAULT DIAGNOSTIC
and ELECTRICAL SYSTEM. The
message “No Response ModA54,
Active” indicates a power problem on
the module. (A CAN 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.
Evaporator fan not
functioning Circuit breaker CB3 tripped
Module AE54 is not powered
1. Check circuit breaker CB3
2. Check relay R12