Fault Code 905: PTO 2 Request
J1939: SA 3 SPN 3453 FMI 4, 9, 12, 13, 14, 19, 20, 31
Overview
The Endurant XD Series transmission incorporates enhanced controls for Power Take-Off (PTO) operation. When PTO operation is required the Transmission Control Module (TCM) receives a request (Input) for PTO operation, determines if operating conditions are suitable, and supplies a signal (Output) to engage the PTO. Once engaged the TCM receives a confirmation to complete the operation. Reference Endurant XD Driver Instructions TRDR0960 for PTO operation. The TCM can be configured to operate a PTO with messages over the vehicle Primary Data Link J1939A or from a PTO switch circuit hardwired directly to the TCM. The TCM is equipped to receive 4 switch inputs and control 3 relay outputs that can be configured in an Input/Output (I/O) Package to support various vocational features. If the TCM is configured to "J1939 Control Only", PTO operation messages are exchanged between the TCM and a OEM vehicle ECU. If the TCM is configured to "Hardwire Control Only, PTO operation is controlled by Input and Output signals from a hardwired switch circuit. The TCM has the functionality to support operation of two PTOs at the same time; one over the Primary Data Link J1939A and one from a hardwired PTO switch circuit. PTO circuit inputs and outputs are connected to the TCM in the 20-Way TCM Body Harness Connector. The PTO and PTO circuit are installed by the OEM or body builder. Reference Input / Output Calibration of the Appendix for recommended PTO circuit wiring diagrams.
The TCM monitors the PTO 2 Request J1939 messages or the hardwired PTO 2 Request circuit input signal. If the messages or signal are not received or are invalid, the fault is set Active.Detection
Conditions to Set Fault Code Active
FMI 4 – Voltage Below Normal or Shorted Low: PTO 2 Request circuit input signal indicated short to ground for 5 seconds. FMI 9 – Abnormal Update Rate: PTO 2 Request messages not received for 5 seconds. FMI 12 – Bad Intelligent Device: TCM has detected an internal processing error. FMI 13 – Out of Calibration: PTO 2 Request message not available for 5 seconds. FMI 14 - Special Instructions: The TCM detected invalid I/O Package calibration. FMI 19 – Received Network Data in Error: PTO 2 Request messages invalid for 5 seconds. FMI 20 – Data Drifted High: PTO 2 Request circuit input signal out of range (4.00–5.25 V) for 5 seconds. FMI 31 - Condition Exists: The TCM detected invalid I/O Package calibration.
All FMIs:Fallback
Conditions to Set Fault Code Inactive
FMI 4: PTO 2 Request circuit not shorted to ground for 10 seconds. FMI 9, 13, 19: PTO 2 Request messages received and valid for 10 seconds. FMI 12: Key cycle and fault condition no longer exists. FMI 14, 31: Valid I/O Package calibration file is configured in TCM.
FMI 20: PTO 2 Request circuit input signal in range for 10 seconds.
Possible Causes
FMI 4, 20: FMI 9, 13, 19: FMI 12: FMI 14, 31:
Fault Code 905 Troubleshooting
A Purpose:Check for Active or Inactive fault codes. Set vehicle parking brake and chock wheels. Record transmission fault codes, FMIs, occurrences, and timestamps from Service Activity Report created during the Diagnostic Procedure. If Fault Code 905 is Inactive and there are other Active vehicle or transmission fault codes, troubleshoot all Active fault codes. Go to Step V If Fault Code 905 FMI 4, 20 is Active, Go to Step B If Fault Code 905 FMI 4, 20 is Inactive, the intermittent nature of the fault makes it likely that the problem is in the PTO 2 Request circuit. Go to Step C Note: PTO and circuit wiring are installed by OEM or body builder. If Fault Code 905 FMI 9 or 19 is Active or Inactive, refer to OEM guidelines for repair of the vehicle PTO 2 Request message (SPN 3453). Go to Step V If Fault Code 905 FMI 12 is Active, replace Transmission Control Module (TCM). Go to Step V If Fault Code 905 FMI 12 is Inactive, Go to Step V If Fault Code 905 FMI 13 is Active, refer to OEM and enable PTO 2 Request message (SPN 3453). Go to Step V If Fault Code 905 FMI 13 is Inactive, PTO 2 is properly configured. Go to Step V If Fault Code 905 FMI 14 or 31 is Active, Contact Eaton Cummins Automated Transmission Technologies for further diagnostic instructions. For Help Line phone numbers, go to Contact Information. Go to Step V If Fault Code 905 FMI 14 or 31 is Inactive, Go to Step V B Purpose:Verify PTO 2 configuration with ServiceRanger. Key on. Connect ServiceRanger. Go To “Configuration”. Select “PTO”. Record "PTO 2" Current Value. If "PTO 2" Current Value indicates “Disabled” and PTO 2 circuit is properly installed and wired, select “Hardwire control only” and follow on-screen prompts. Go to Step V If "PTO 2" Current Value indicates “Hardwire control only" and PTO 2 Request circuit is properly installed and wired, Go to Step C C Purpose:Verify Input/Output Package type with ServiceRanger. Key on with engine off. Connect ServiceRanger. Go To “Configuration”. Select “Calibrations” tab. Record "I/O Package" Current Value. Based on I/O package configured refer to I/O circuit schematic indicated in table. Contact OEM or body builder for repair or replacement of PTO 2 Request circuit. Go to Step V Note: PTO and circuit wiring are installed by OEM or body builder. V Purpose:Verify repair. Key off. Reconnect all connectors and verify all components are properly installed. Key on with engine off. Connect ServiceRanger. Go To “Fault Codes”. Select “Clear All Faults”. Operate vehicle and attempt to reset the fault code or duplicate the previous complaint. Check for fault codes using ServiceRanger. If no fault codes set and vehicle operates properly, test complete. If Fault Code 905 sets Active, Go to Step A If a fault code other than 905 sets Active, troubleshoot per the Fault Code Isolation Procedure Index.Fault Code 905: PTO 2 Request Package # and Description 20-Way TCM Body Connector Pin(s) Component(s) Input / Output Calibration Package 5: PTO 1 + PTO 2 6 14 PTO2 Request Switch DPST Input / Output Calibration Package 23 and 26: PTO 1 + PTO 2 + Force Neutral and Hold Neutral + PTO 1 + PTO 2 Input / Output Calibration Package 34: PTO 1 + PTO 2 + Reverse Output
