Fault Code 617: Rail C Aft Solenoid (B1)
J1939: SA 3 SPN 5910 FMI 0, 1, 3, 4, 5, 6, 7, 8, 12, 14, 15, 16, 17, 18, 31
Overview
The Mechatronic Transmission Module (MTM) is equipped with solenoids to direct pneumatic flow. The Rail C Aft Solenoid (RCAS) is energized by the Transmission Control Module (TCM) to direct vehicle supplied air pressure to actuate the Rail C Sliding Clutch in the aft or rearward direction. The RCAS is located in the MTM and connected to the TCM at the 74-Way Transmission Harness Connector.
Detection
The TCM monitors the RCAS. If a system failure is detected, the fault is set Active.
Conditions to Set Fault Code Active
FMI 0 – Data Valid But Above Normal (Most Severe): RCAS low side current is greater than commanded current.
FMI 1 – Data Valid But Below Normal (Most Severe): RCAS low side current is less than commanded current.
FMI 3 – Voltage Above Normal or Shorted High: RCAS shorted to power for 2 seconds.
FMI 4 – Voltage Below Normal or Shorted Low: RCAS shorted to ground for 2 seconds.
FMI 5 – Current Below Normal or Open Circuit: RCAS open circuit for 2 seconds.
FMI 6 – Current Above Normal or Shorted Circuit: RCAS commanded on and shorted to ground.
FMI 7 – Mechanical System Not Responding: One time during an ignition cycle, Rail C Position Sensor reported uncommanded movement aft, out of the Primary Drive Gear, and speed sensors con-firmed the loss of Primary Drive Gear engagement.
FMI 8 – Abnormal Frequency: RCAS out of normal operating frequency.
FMI 12 – Bad Intelligent Device: RCAS commanded on beyond expected duty cycle.
FMI 14 – Special Instructions: Rail C Position Sensor reported uncommanded movement from Neutral toward the Secondary Driven Gear immediately after a shift to Neutral for 2 seconds.
FMI 15 – Data Valid but Above Normal (Least Severe): Rail C Position Sensor reported uncommanded movement from Neutral toward the Secondary Driven Gear for 2 seconds.
FMI 16 – Data Valid but Above Normal (Moderately Severe): RCAS commanded on for longer than expected increasing solenoid temperature.
FMI 17 – Data Valid but Below Normal (Least Severe): Rail C Position Sensor reported uncommanded movement aft, out of the Primary Drive Gear, and speed sensors confirmed the loss of Primary Drive Gear engagement.
FMI 18 – Data Valid but Below Normal (Moderately Severe): RCAS commanded on below expected voltage.
FMI 31 – Condition Exists: During a Rail Calibration, Rail C Position Sensor reported uncommanded movement aft, out of neutral toward the Secondary Driven Gear.
Fallback
FMI 0, 1, 5, 6, 8, 12, 16, 18:
- Amber warning lamp on
- If vehicle is stationary and Rail C is not engaged in the Secondary Driven Gear
- Rail C movement in the aft direction prohibited
- If vehicle is moving and Rail C is engaged in the Secondary Driven Gear
- Rail C movement prohibited
- If vehicle is moving and no start gear available
- Red stop lamp on
FMI 3, 4:
- Amber warning lamp on
- Rail C movement in the aft direction prohibited
FMI 7:
- No degraded modes
FMI 14, 15:
- Amber warning lamp on
- Non neutral modes prohibited
- PTO mode prohibited
- If the vehicle is moving and the transmission is in gear
- Red stop lamp on
- Transmission shifts to neutral when vehicle comes to a stop
FMI 17:
- Amber warning lamp on
- Rail C engagement of the Primary Drive Gear prohibited
- If vehicle is moving and no start gear available
- Red stop lamp on
FMI 31:
- Amber warning lamp on
- Non Neutral Modes prohibited
Conditions to Set Fault Code Inactive
FMI 0, 1, 6, 7, 8, 12, 14, 15, 16, 17, 18, 31: Key cycle
FMI 3, 4, 5: RCAS in range for 10 seconds
Possible Causes
FMI 0, 1, 3, 4, 5, 6, 8, 16, 18:
- MTM - RCAS
- Internal failure
- Damaged
- MTM - Transmission Harness
- Wiring shorted to power, shorted to ground or open
- TCM
- Internal failure
FMI 7, 17:
- MTM - RCAS
- Partially stuck open
- Internal transmission
- Primary Drive Gear
- Rail C Sliding Clutch
FMI 12:
- TCM
- Software issue
- Internal failure
FMI 14, 15:
- MTM - RCAS
- Partially stuck open
- MTM - Rail C Position Sensor
- Internal failure
FMI 31:
- MTM - RCAS
- Partially stuck open
Additional Tools
- Endurant HD Service Manual TRSM0950
- Eaton Breakout Box with 74-Way Eaton Diagnostic Adapter - RR1029TR
- Digital Volt/Ohm Meter (DVOM)
Component Identification
 |
1. Transmission Control Module (TCM) Cover 2. Transmission Control Module (TCM) 3. 74-Way Transmission Harness Connector (MTM-side) 4. 74-Way Transmission Harness Connector (TCM-side) 5. Transmission Control Module (TCM) Seal 6. Mechatronic Transmission Module (MTM) |
Fault Code 617 Troubleshooting
Set vehicle parking brake and chock wheels.
Record the transmission fault codes, FMIs, occurrences, and timestamps from the Service Activity report created during the Diagnostic Procedure.
If Fault Code 617 FMI 14 is Active or Inactive, Go to Step J
If Fault Code 617 FMI 0, 1, 3, 4, 5, 6, 8, 16, 18 is Active or Inactive, Go to Step B
If Fault Code 617 FMI 12 is Active or Inactive, 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 617 FMI 7, 15, 31 is Active or Inactive, go to TAIB-1006 MTM Solenoid Fault Codes and Vehicle Air System Contamination.
If Fault Code 617 FMI 17 is Active or Inactive, contact Eaton Cummins Automated Transmission Technologies for further diagnostic instructions. For Help Line phone numbers, go to Contact Information. Go to Step V
NOTICE: Refer to Vehicle Maintenance Recommendations regarding vehicle air system requirements to ensure proper air supply and air quality.
Key off.
Remove the TCM from the MTM with the 20-Way TCM Vehicle Harness Connector and 20-Way TCM Body Harness Connector connected.
Inspect the TCM side of the 74-Way Transmission Harness Connector, verify the connector is free from contamination and corrosion; the terminals are not bent, spread or loose; and there is no damage to the connector body.
Inspect the TCM Seal, verify the seal is properly installed and not damaged.
If contamination or damage is found to the TCM side of the 74-Way Transmission Harness Connector, replace the Transmission Control Module (TCM) and Mechatronic Transmission Module (MTM). Go to Step V
Note: MTM removal and installation requires the transmission to be removed from the vehicle. Reference Endurant HD Service Manual TRSM0950, Transmission Removal Service Procedure.
If no contamination or damage is found, Go to Step C
Key on with engine off.
Connect ServiceRanger.
Go To “Configuration”.
Select “Advanced”.
Note: If “Advanced” is not indicated, TCM software is unable to determine MTM Type. Go to Step 6.
Record “MTM Type” Current Value, go to Step 7.
Locate MTM part information tag and record MTM Part Number (Item 1) in table.
Compare MTM Part Number recorded in Step 6 with MTM Part Number in table to determine MTM Type.
If MTM Type is PS-393, Go to Step D
If MTM Type is PS-496, Go to Step E
| MTM Part Number on tag | |
|---|---|
| MTM Part Number | MTM Type |
| A-10000715 | PS-393 |
| A-10002594 | |
| A-10004202 | |
| A-10004231 | PS-496 |
| A-10004356 | |
| A-10004383 | |
Key off.
Connect the Eaton Breakout Box with 74-Way Eaton Diagnostic Adapter to the MTM side of the 74-Way Transmission Harness Connector.
Measure resistance at the Eaton Breakout Box between Pin 28 and Pin 29. Record reading in table.
Measure resistance at the Eaton Breakout Box between Pin 28 and Ground (TCM mounting stud). Record reading in table.
Compare reading(s) in table.
If readings are in range, Go to Step F
If readings are out of range, replace Mechatronic Transmission Module (MTM). Go to Step V
Note: MTM removal and installation requires the transmission to be removed from the vehicle. Reference Endurant HD Service Manual TRSM0950, Transmission Removal Service Procedure.
| Pins | Range | Reading(s) |
|---|---|---|
| 28 to 29 | 3.6–4.4 Ohms | |
| 28 to ground (TCM mounting stud) | Open Circuit (OL) |
Key off.
Connect the Eaton Breakout Box with 74-Way Eaton Diagnostic Adapter to the MTM side of the 74-Way Transmission Harness Connector.
Measure resistance at the Eaton Breakout Box between Pin 28 and Pin 29. Record reading in table.
Measure resistance at the Eaton Breakout Box between Pin 28 and Ground (TCM mounting stud). Record reading in table.
Compare reading(s) in table.
If readings are in range, Go to Step F
If readings are out of range, replace Mechatronic Transmission Module (MTM). Go to Step V
Note: MTM removal and installation requires the transmission to be removed from the vehicle. Reference Endurant HD Service Manual TRSM0950, Transmission Removal Service Procedure.
| Pins | Range | Reading(s) |
|---|---|---|
| 28 to 29 | 3.4–5.5 Ohms | |
| 28 to ground (TCM mounting stud) | Open Circuit (OL) |
Key off.
Remove the Eaton Breakout Box 74-Way Eaton Diagnostic Adapter.
Reinstall the TCM to the MTM.
Reconnect all connectors and verify that all components are properly installed.
Key on.
Connect ServiceRanger.
Retrieve and record the transmission fault codes, FMIs, occurrences, and timestamps.
If Fault Code 617 FMI 0, 1, 3, 4, 5, 6, 8, 16, 18, 31 is Active, replace the Transmission Control Module (TCM). Go to Step V
If Fault Code 617 FMI 0, 1, 3, 4, 5, 6, 8, 16, 18, 31 is Inactive, replace the Mechatronic Transmission Module (MTM). Go to Step V
Note: MTM removal and installation requires the transmission to be removed from the vehicle. Reference Endurant HD Service Manual TRSM0950, Transmission Removal Service Procedure.
Key off.
Refer to OEM guidelines and vent the vehicle air supply line to the MTM.
Refer to OEM guidelines and remove the vehicle air supply line at the MTM.
Inspect the vehicle air supply line and the MTM air inlet port for contamination, moisture, corrosion, and/or debris.
Note: Verify the MTM inlet screen is installed and free of contamination and/or debris.
If contamination is found, refer to OEM guidelines for repair or replacement of the vehicle air system. Replace the Mechatronic Transmission Module (MTM) and reference the Lower Countershaft Cover and Inertia Brake Service Procedure for replacement of the Inertia Brake Assembly. Go to Step V
Note: MTM removal and installation requires the transmission to be removed from the vehicle. Reference Endurant HD Service Manual TRSM0950, Transmission Removal Service Procedure.
If no contamination is found, Go to Step H
Key off.
Remove MTM.
Note: MTM removal and installation requires the transmission to be removed from the vehicle. Reference Endurant HD Service Manual TRSM0950, Transmission Removal Service Procedure.
Inspect the Secondary Driven Gear for excessive fore and aft movement.
If excessive gear movement is evident, inspect the Main Shaft Assembly and Secondary Driven Gear and repair. Go to Step V
If no excessive gear movement is evident, Go to Step I
Inspect the Rail C Sliding Clutch yoke slot for wear.
Shift the Rail C Sliding Clutch to the neutral position (if necessary).
Shift the Rail C Sliding Clutch into the Primary Drive Gear engagement position (fore).
Inspect the Rail C Sliding Clutch clutching teeth for wear.
Return the Rail C Sliding Clutch to neutral.
Shift the Rail C Sliding Clutch into the Secondary Driven Gear engagement position (aft).
Inspect the Rail C Sliding Clutch clutching teeth for wear.
Return the Rail C Sliding Clutch to neutral.
If the Rail C Sliding Clutch shifts into all three positions and no clutching teeth wear is present, replace Mechatronic Transmission Module (MTM). Go to Step V
If the Rail C Sliding Clutch does not shift into all three positions or clutching teeth wear is present, reference the Primary Drive Gear Replacement procedure for replacement of the Rail C Sliding Clutch and the Primary Drive Gear. Replace the Secondary Driven Gear and the Mechatronic Transmission Module (MTM). Go to Step V
Record MTM Serial Number (Item 2).
If MTM Serial Number is less then 12S22342093445, go to service bulletin TAIB-0994 MTM Loose Rail Cover Cap Screws.
If MTM Serial Number is equal to or greater than 12S22342093445, Go to Step G
Key off.
Reconnect all connectors and verify that 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 the vehicle operates properly, test complete.
If Fault Code 617 sets Active during operation, Go to Step A
If a fault code other than 617 sets Active, troubleshoot per the Fault Code Isolation Procedure Index.