Service Bulletin Buses

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Colin Bond
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1 Prevost Saint-Nicolas, Quebec, Canada Buses No. Release Page Date Group ( 9 ) Gear Selector Control Module (GSCM) MID 223, Diagnostic Trouble Code (DTC), Guide Gear Selector Control Module (GSCM) MID 223, Diagnostic Trouble Code (DTC), Guide Contents MID 223 Gear Selector Control Module, page 2 Gear Selector Control Module (MID 223), Diagnostic Fault Codes (DTC), page 3 Information is subject to change without notice. Illustrations are used for reference only and may differ slightly from the actual vehicle being serviced. However, key components addressed in service information are represented as acculy as possible. PV USA42467

2 ( 9 ) MID 223 Gear Selector Control Module The manufacturer scan tool is the preferred tool for performing diagnostic work. Contact your local dealer for more information or visit System Overview A gear selector control module (GSCM) located under the dash board receives operator input signals from the gear selector that is mounted to the left of the drivers seat, along with steering wheel mounted gear selector buttons. The GSCM interpret these signals and communicates the information to the transmission control module (TCM) via the SAE J1939 data link. The GSCM also communicates on the SAE J1587 data link for diagnostic purposes and serve as a redundancy to the SAE J1939 data link in case of data link failure. The selector includes gear positions of R (reverse), N (neutral), D (drive), and M (manual). The drive and Limp Home Mode Note: Limp Home Mode should only be used to get a vehicle to a safe or secure location. It is not meant for driving any distance. In the event the that a transmission malfunction occurs, "Limp Home Mode" can be activated. This mode is only meant to get a vehicle to a safe or secure location. To activate, press the??????? button on the gear selector and then select the D position on the gear selector to active manual are both used for selecting the forward gears in the transmission. With the selector in the drive position the transmission will shift as an automatic, performing gear selections and shifting without driver input. When the manual position is selected, the driver can use the steering wheel selector buttons to choose gears. In situations where the I-Shift is unintentionally left in gear with the parking brake applied, the TCM will automatically go to neutral when the ignition switch is turned off. This is done to avoid the transmission getting stuck in gear due to drive line "torque up". "Limp Home Mode". When activated, L is displayed as the driving mode in the instrument panel digital information display (DID). In "Limp Home Mode", only forward gears 1, 3 and 5 are available. To selector or change a gear while in this mode the vehicle has to be stationary. The "Limp Home Mode", will automatically be deactivated when the ignition is turned off.

3 ( 9 ) Gear Selector Control Module (MID 223), Diagnostic Fault Codes (DTC) The manufacturer scan tool is the preferred tool for performing diagnostic work. Contact your local dealer for more information or visit The electronic control units (ECUs) on the SAE J1587 data link communicate according to the SAE J1587 standard. The standard has been extended with supplements (PPID, PSID). The diagnostic trouble codes (DTCs) set by the ECUs contain information that is described by the following abbreviations. MID Message Identification Description: Identification of a control unit. SID Subsystem Identification Description: Identification of a component. PID PPID Parameter Identification Description: Identification of a parameter (value). Proprietary Parameter Identification Description: Unique identification of a parameter (value). PSID FMI Proprietary Subsystem Identification Description: Unique identification of a component. Failure Mode Identifier: Identification of fault types. FMI Table FMI Display Text SAE Text 0 Too high value Data valid, but above the normal work range 1 Too low value Data valid, but below the normal work range 2 Incorrect data Data erratic, Intermittent or incorrect 3 Electrical fault Voltage above normal or shorted high 4 Electrical fault Voltage below normal or shorted low 5 Electrical fault Current below normal or open circuit 6 Electrical fault Current above normal or grounded circuit 7 Mechanical fault Mechanical system not responding properly 8 Mechanical or electrical fault Abnormal frequency, pulse width or period 9 Communication fault Abnormal update 10 Mechanical or electrical fault Abnormal of change 11 Unknown fault Failure mode not identifiable 12 Component fault Bad intelligent device or component 13 Incorrect calibration Out of calibration 14 Unknown fault Special instructions 15 Unknown fault Reserved for future assignment by SAE Data Formal Subcommittee

4 Diagnostic Trouble Code (DTC) List PSID Prevost Date Group No. Release Page ( 9 ) MID 223 PSID 9, Gear Selector, Position, page 5 MID 223 PSID 36, Relay Power Supply, page 5 MID 223 PSID 42, Signals Key, page 6 MID 223 PSID 200, Communication Interference, Data Link, Engine Control Module (ECM), page 6 MID 223 PSID 201, Communication Interference, Data Link, Vehicle Electronic Control Unit (VECU), page 7 MID 223 PSID 205, Communication Interference, Data Link, Transmission Control Module (TCM), page 7 MID 223 PSID 214, No Data From Bodybuilders Module (BBM), page 8 SID MID 223 SID 231, SAE J1939 Data Link, page 8 MID 223 SID 237, Relay, Starter Motor, page 8 MID 223 SID 240, Program Memory, page 9 MID 223 SID 250, SAE J1587 Data Link, page 9 MID 223 SID 253, Calibration Memory EEPROM, page 9 MID 223 SID 254, Hardware Fault, page 9

5 ( 9 ) MID 223 PSID 9, Gear Selector, Position FMI 12 Faulty device or component The sensor signals do not correspond with valid value Some or all stalk actions are not working It is not possible to select gear Gear position sensor MID 223 PSID 36, Relay Power Supply FMI 7 FMI 12 Mechanical system not responding properly Faulty device or component The relay does not release 0 voltage at Pin 1 Fault displayed after ignition OFF Risk of battery discharge if main circuit breaker is not opened when vehicle is not used It is not possible to drive the vehicle Relay Short circuit of output to ground when relay is active

6 ( 9 ) MID 223 PSID 42, Signals Key FMI 2 Data erratic, intermittent, or incorrect Inconsistency between hardwired ignition signal and ignition signal read on network Transmission supplied and Optidriver fully functional until main circuit breaker is opened Risk of battery discharge if main circuit breaker not opened when vehicle not used Transmission not supplied and vehicle immobilized after main circuit breaker has been cycled Blown fuse MID 223 PSID 200, Communication Interference, Data Link, Engine Control Module (ECM) Message missing on SAE J1939 data link from the ECM Downhill help Open circuit in SAE J1939 data link between gear selector control module (GSCM) and ECM

7 ( 9 ) MID 223 PSID 201, Communication Interference, Data Link, Vehicle Electronic Control Unit (VECU) Message missing on SAE J1939 data link from the VECU Temporary manual mode Downhill help Return to drive Open circuit in SAE J1939 data link between gear selector control module (GSCM) and VECU MID 223 PSID 205, Communication Interference, Data Link, Transmission Control Module (TCM) Message missing on SAE J1939 data link from the TCM No memorization during 1.5 sec of direction change requests when vehicle is moving Temporary manual mode Open circuit in SAE J1939 data link between gear selector control module (GSCM) and TCM

8 ( 9 ) MID 223 PSID 214, No Data From Bodybuilders Module (BBM) Message missing on SAE J1939 data link from the BBM N/A N/A MID 223 SID 231, SAE J1939 Data Link FMI 2 Data erratic, intermittent, or incorrect SAE J1939 data link communication does not work MID 223 SID 237, Relay, Starter Motor FMI 3 Gear lever commands slower (SAE J1587 data link) No memorization during 1.5 sec of direction change requests when vehicle is moving Temporary manual mode Downhill help Return to drive Voltage above normal or shorted high Vehicle won t start Vehicle won t start Relay

9 ( 9 ) MID 223 SID 240, Program Memory FMI 2 Data erratic, intermittent, or incorrect Fault data in program memory The control unit is not programmed Gear selector control module (GSCM) no function except supply the relay Unable to shift out of neutral position GSCM not programmed Program memory MID 223 SID 250, SAE J1587 Data Link The SAE J1587 data link is not working N/A MID 223 SID 253, Calibration Memory EEPROM FMI 2 Data erratic, intermittent, or incorrect Fault in main software MID 223 SID 254, Hardware Fault FMI 12 Use of default values of parameters Faulty device or component Internal fault in control unit It is not possible to drive the vehicle A control module is being programmed The gear selector control module (GSCM) is not programmed Software Gear selector control module (GSCM)

Service Bulletin Buses

Prevost Saint-Nicolas, Quebec, Canada Service Bulletin Buses Date Group No. Release Page 6.2010 364 00 1(12) Vehicle Electronic Control Unit (VECU) MID 144, Diagnostic Trouble Code (DTC), Guide Vehicle