PREVOST X3-45 VIP 2017, Owner'S Manual

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Appendix B - Troubleshooting Guide for Multiplex Vehicles 5
Problem/Symptom Probable Causes Actions
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
or is faulty
1. Check circuit breaker CB3
2. Check relay R12
3. 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).
4. Check / reset circuit breaker CB5
5. Check / replace fuse F135
6. Probe gray connector on module to
see if it is powered.
HVAC condenser fans not
functioning in speed 1 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. Check / replace fuse F141-F144
5. Probe gray connector on module to
see if it is powered.