NHTSA ID Number: 10220363
Manufacturer Communication Number: SM2202
TSB/Document Date: 2022-09-22
Summary
SM2022 EV Maintenance and Service Documentation This Service Memorandum is to announce information on Cummins
Power Electric buses now available at Quickserve Online. Dealer must have access to Quickserve to obtain these service maintenance and repair procedures.
DC/DC 1 High Side Voltage ‐ Voltage Above Normal or Shorted to High
Source
DC/DC 1 Low Side Current ‐ Data Error
DC/DC 1 High Side Voltage ‐ Voltage High
DC/DC 1 High Side Current ‐ Above Normal
DC/DC 1 High Side Current ‐ Current Above Normal or Grounded Circuit
DC/DC 1 Converter Temperature ‐ Data Valid But Above Normal
DC/DC 1 Temp High ‐ Severe
Operating Range ‐ Most Severe Level
DC/DC 1 Low Side Power ‐ Voltage Above Normal or Shorted to High
DC/DC 1 Low Side Power ‐ Voltage High
Source
DC/DC 2 Operational Status ‐ Update Rate
DC/DC 2 Operational Status ‐ Abnormal Update Rate
DC/DC 2 Operational Status ‐ Voltage Above Normal or Shorted to High
DC/DC 2 Operation Status ‐ Voltage High
Source
DC/DC 2 Low Side Voltage ‐ Voltage Below Normal or Shorted to Low
DC/DC 2 Low Side Voltage ‐ Voltage Low
Source
DC/DC 2 Low Side Current ‐ Data Erratic, Intermittent, or Incorrect
DC/DC 2 High Side Voltage ‐ Voltage Above Normal or Shorted to High
Source
DC/DC 2 Low Side Current ‐ Data Error
DC/DC 2 High Side Voltage ‐ Voltage High
DC/DC 2 High Side Current ‐ Above Normal
DC/DC 2 High Side Current ‐ Current Above Normal or Grounded Circuit
DC/DC 2 Low Side Power ‐ Voltage Above Normal or Shorted to High
DC/DC 2 Low Side Power ‐ Voltage High
Source
DC/DC 2 Converter Temperature ‐ Data Valid But Above Normal
DC/DC 2 Temp High ‐ Severe
Operating Range ‐ Most Severe Level
Connectivity Module ‐ Bad Device
Connectivity Module ‐ Update Rate
DC/DC 1 High Side Voltage Low ‐ Severe
DC/DC 2 High Side Voltage Low ‐ Severe
HVESS HVIL Status ‐ Voltage High
HVESS HVIL Status ‐ Voltage Low
HVESS HVIL Status ‐ Cond Exists
HVESS HVIL Status ‐ Root Cause Not Known
Connectivity Antenna ‐ Voltage High
Motor Inverter HV Input ‐ Voltage High
Motor Inverter HV Input ‐ Voltage Low
Batt Coolant Inlet Temp ‐ Voltage High
Batt TMS Coolant In Temp ‐ Voltage Low
CCU 1 Time Out ‐ Update Rate
Cummins
Fault Code
#
Lamp (Service
Indicator)
J1939
SPN
J1939
FMI
8338
Warning (Solid)
681
9
Transmission Gear Shift Inhibit Request ‐ Abnormal Update Rate
8341
Warning (Solid)
9842
9
Momentary Operator Key Switch ‐ Abnormal Update Rate
8456
Warning (Solid)
521242
3
Plug‐In Port 1 Positive Charge Contactor Circuit
8457
8527
Warning (Solid)
Warning (Solid)
521242
2912
4
9
Plug‐In Port 1 Positive Charge Contactor Circuit
Hill holder mode ‐ Abnormal Update Rate
8528
Warning (Solid)
2912
13
8571
Warning (Solid)
521260
4
8572
Warning (Solid)
521260
3
8573
Warning (Solid)
521260
5
8574
Warning (Solid)
521261
4
8575
Warning (Solid)
521261
3
8576
Warning (Solid)
521261
5
8577
Warning (Solid)
521262
4
Hill holder mode ‐ Out of Calibration
Charger Controller Unit 1 DC Temperature Sensor Circuit ‐ Voltage
Below Normal or Shorted to Low Source
Charger Controller Unit 1 DC Temperature Sensor Circuit ‐ Voltage
Above Normal or Shorted to High Source
Charger Controller Unit 1 DC Temperature Sensor Circuit ‐ Current
Below Normal or Open Circuit
Charger Controller Unit 1 Proximity Pin Sensor Circuit ‐ Voltage Below
Normal or Shorted to Low Source
Charger Controller Unit 1 Proximity Pin Sensor Circuit ‐ Voltage Above
Normal or Shorted to High Source
Charger Controller Unit 1 Proximity Pin Sensor Circuit ‐ Current Below
Normal or Open Circuit
Charger Controller Unit 1 Inlet Lock Feedback Sensor Circuit ‐ Voltage
Below Normal or Shorted to Low Source
8578
Warning (Solid)
521262
3
8579
Warning (Solid)
521262
5
8581
Warning (Solid)
521263
4
8582
Warning (Solid)
521263
3
8583
Warning (Solid)
521263
5
8584
Warning (Solid)
521263
31
Charger Controller Unit 1 Plug Lock Output 1 Sensor Circuit ‐ Voltage
CCU 1 Plug Lock Output 1 ‐ Voltage High
Above Normal or Shorted to High Source
Charger Controller Unit 1 Plug Lock Output 1 Sensor Circuit ‐ Current
CCU 1 Plug Lock Output 1 ‐ Current Low
Below Normal or Open Circuit
Charger Controller Unit 1 Plug Lock Output 1 Sensor Circuit ‐ Condition
CCU 1 Plug Lock Output 1 ‐ Cond Exists
Exists
Warning (Solid)
521264
4
Charger Controller Unit 1 Connection Lamp Driver Sensor Circuit ‐
Voltage Below Normal or Shorted to Low Source
CCU 1 Connection Lamp ‐ Voltage Low
8585
Warning (Solid)
521264
3
8587
Warning (Solid)
521264
5
Charger Controller Unit 1 Connection Lamp Driver Sensor Circuit ‐
Voltage Above Normal or Shorted to High Source
Charger Controller Unit 1 Connection Lamp Driver Sensor Circuit ‐
Current Below Normal or Open Circuit
CCU 1 Connection Lamp ‐ Voltage High
8586
Warning (Solid)
521265
4
Charger Controller Unit 1 Charging Status Lamp Driver Sensor Circuit ‐
Voltage Below Normal or Shorted to Low Source
CCU 1 Charging Status Lamp ‐ Voltage Low
8588
Warning (Solid)
521265
3
8591
Warning (Solid)
521265
5
8592
Warning (Solid)
521266
4
Charger Controller Unit 1 Charging Status Lamp Driver Sensor Circuit ‐
Voltage Above Normal or Shorted to High Source
Charger Controller Unit 1 Charging Status Lamp Driver Sensor Circuit ‐
Current Below Normal or Open Circuit
Charger Controller Unit 1 AC Temperature Sensor Circuit ‐ Voltage
Below Normal or Shorted to Low Source
CCU 1 Charging Status Lamp ‐ Voltage Hi
8589
SPN / FMI Cummins Description
Charger Controller Unit 1 Inlet Lock Feedback Sensor Circuit ‐ Voltage
Above Normal or Shorted to High Source
Charger Controller Unit 1 Inlet Lock Feedback Sensor Circuit ‐ Current
Below Normal or Open Circuit
Charger Controller Unit 1 Plug Lock Output 1 Sensor Circuit ‐ Voltage
Below Normal or Shorted to Low Source
SPN / FMI Cummins Description
(for Blue Bird Diagnostic display)
Trans Gear Shift Inhibit ‐ Update Rate
Momentary Operator Key Sw ‐ Update Rate
Plug‐In Port 1 Pos Charge Contactor
Plug‐In Port 1 Pos Charge Contactor
Hill holder mode ‐ Update Rate
Hill holder mode ‐ Out of Calibration
CCU 1 DC Temp Sensor ‐ Voltage Low
CCU 1 DC Temp Sensor ‐ Voltage High
CCU 1 DC Temp Sensor ‐ Current Low
CCU 1 Proximity Pin Sensor ‐ Voltage Low
CCU 1 Prox Pin Sensor ‐ Voltage High
CCU 1 Proximity Pin Sensor ‐ Current Low
CCU 1 Inlet Lock Feedback ‐ Voltage Low
CCU 1 Inlet Lock Feedback ‐ Voltage High
CCU 1 Inlet Lock Feedback ‐ Current Low
CCU 1 Plug Lock Output 1 ‐ Voltage Low
CCU 1 Connection Lamp ‐ Current Low
CCU 1 Charging Status Lamp ‐ Current Low
CCU 1 AC Temp Sensor ‐ Voltage Low
Cummins
Fault Code
#
Lamp (Service
Indicator)
J1939
SPN
J1939
FMI
8593
Warning (Solid)
521266
3
8594
Warning (Solid)
521266
5
8631
Warning (Solid)
525
9
8635
Warning (Solid)
521271
5
Transmission Requested Gear ‐ Abnormal Update Rate
High Voltage Measurement Port Interlock Loop ( HVMPIL) ‐ Current
Below Normal or Open Circuit
11113
Stop (Solid)
521241
7
Plug‐In Port 1 Negative Charge Contactor Circuit
11114
Warning (Solid)
521241
12
Plug‐In Port 1 Negative Charge Contactor Circuit
11115
Stop (Solid)
521242
7
Plug‐In Port 1 Positive Charge Contactor Circuit
11116
Warning (Solid)
521242
12
Plug‐In Port 1 Positive Charge Contactor Circuit
11128
None
8234
7
11219
Warning (Solid)
521288
4
11221
Warning (Solid)
521288
3
11222
Warning (Solid)
521288
5
11223
Warning (Solid)
521288
31
11229
Warning (Solid)
8234
31
11356
Warning (Solid)
8334
3
11357
Warning (Solid)
8334
4
HV Batt TMS Heater Status ‐ Cond Exists
HVESS Thermal Management System Heater Status ‐ Condition Exists
DC/AC Accessory Inverter 1 Device 1 Status ‐ Voltage Above Normal or
Accessory Inverter 1 Stat ‐ Voltage High
Shorted to High Source
DC/AC Accessory Inverter 1 Device 1 Status ‐ Voltage Below Normal or
Accessory Inverter 1 Stat ‐ Voltage Low
Shorted to Low Source
11393
11394
Warning (Solid)
Warning (Solid)
9436
2913
11
9
Propulsion Inverter 1 Control Module ‐ Root Cause Not Known
Halt Brake mode ‐ Abnormal Update Rate
11472
Warning (Solid)
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TSB/Document ID: SM2202
Replacement Service Bulletin Number:
MFR Communication Date: 2022-09-02
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: POWER TRAIN
MFR Component System:
MFR Component Subsystem:
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