SC-25-015
Service Bulletin/Repair Instructions
Service bulletin outlining an EEPROM adjustment to reduce regeneration cycles, resulting in lower cabin noise and reduced operating temperatures.
Vehicle report
2023 PROTERRA ZX5
Service bulletins
24 bulletinsTechnical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
SC-24-013
Service Bulletin/Repair Instructions
Transit bus software update to support bugs and enhancement for the fleet. As well as fault updates.
SC-24-014
Service Bulletin/Repair Instructions
Heavy duty transit bus software update to support bugs and enhancements for the ZX5 fleet.
SC-23-007
Service Bulletin/Repair Instructions
HVAC Software update to increase the threshold voltage from 740v to 785v to overcome with the HV fault at 100% SOC.
SC-23-160
Service Bulletin/Repair Instructions
Transit bus vehicle controller software update to fix bugs and improve driver experience.
SC-23-176
Service Bulletin/Repair Instructions
BMS software update to the latest version. It improves current sensors performance and adjusts the isolation fault threshold value.
SC-23-177
Service Bulletin/Repair Instructions
This procedure updates the BMS software to the latest version.
SC-23-042
Service Bulletin/Repair Instructions
Transit bus harness RW to add diode inline for proper can communication.
FC-23-140
Service Bulletin/Repair Instructions
Service bulletin fleet check for the transit buses due to potential missing split blocks on DuoPower Vehicles.
SC-23-154
Service Bulletin/Repair Instructions
The procedure describes the process of updating the PCM to latest Software to reduce improper faults.
IB-23-124
Service Bulletin/Repair Instructions
Service Bulletin for Transit Vehicles to reduce the gearboxes PMI interval due to failing filters.
SC-23-128
Service Bulletin/Repair Instructions
The procedure describes the process of rerouting the rooftop coolant lines so the expansion tank is downstream of the HVAC chiller and lowers the pressure drop between expansion tank and pump inlet.
SC-23-090
Service Bulletin/Repair Instructions
This Technical Service Bulletin covers the procedure for replacing the Power Electronic Coolant Loop quick connect fittings with more durable brass fittings on 35ft ZX5.A0 buses.
SC-23-091
Service Bulletin/Repair Instructions
This Technical Service Bulletin covers the procedure for replacing the Power Electronic Coolant Loop quick connect fittings with more durable brass fittings for 40ft ZX5.A0 buses.
SC-23-109
Service Bulletin/Repair Instructions
The procedure describes the process of updating the vehicles software along with a hardware change to improve the vehicles experience and diagnostics on ZX5.A02 buses.
SC-22-044
Service Bulletin/Repair Instructions
Bulletin instructions for rotating the ambient temp sensor 180deg on transit buses to reduce road debris from accumulating on the temp sensor.
SC-23-115
Service Bulletin/Repair Instructions
The procedure describes the process of updating the vehicles software to 3.8.13 to improve the vehicles experience and diagnostics.
SC-23-055
Service Bulletin/Repair Instructions
Relocation of the air compressors intake as well as adding a preliminary filter at the top of the air intake..
SC-23-085
Service Bulletin/Repair Instructions
The procedure describes the process of updating the gearboxes from a dual turn to a single turn snap ring on Duopower buses.
SC-23-044
Service Bulletin/Repair Instructions
The procedure describes the process of removing the previous used parking brake tank support bracket, and reinstalling a more secured bracket.
SC-23-041
Service Bulletin/Repair Instructions
Retrofitting the passenger stop request buttons to properly illuminate the sign by the driver to allow other passengers and driver that a customer would like to exit the vehicle.
SC-23-030
Service Bulletin/Repair Instructions
Software update to the HVAC controller due to a supplier change in isolator materials. The solution RPM changed to reduce the resonance heard in the cabin.
FC-23-006
Service Bulletin/Repair Instructions
Repair instructions for the telemetry system on the heavy duty transit buses if the system is not reporting.
IB-23-032
Service Bulletin/Repair Instructions
Service Bulletin for an alternative coolant temp sensor for transit buses as the original sensor installed is challenging to purchase due to supply constraints.
Reading this report
Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.