Overview

All UltraShift PLUS transmission systems utilize a service lamp that can be illuminated when certain system failures are detected. The service lamp may be part of the Shift Device or may be a separate light in the vehicle dash.

Additionally, UltraShift PLUS transmission systems utilize a gear display that indicates the current state of the transmission. The gear display may be an integral part of the vehicle dash, or may be a separate dash mounted display.

This procedure describes the possible states of the service lamp and gear display.

Lamp Descriptions

Transmission Service Lamp

The Transmission Service Lamp is usually a red light that reads “Service”. However, on some chassis an amber transmission icon or “Check Trans” light may be substituted for the red Service Lamp. It may be located on the Push Button Shift Control, Shift Lever, or in the vehicle dash. The Transmission Service Lamp is commanded on and off by the Transmission Electronic Control Unit (TECU) via a direct wire, J1939, or the High Integrity Link (HIL).

• Under normal conditions, the Service Lamp lights momentarily at key-on as part of the TECU self-test.
• A continuously flashing Service Lamp indicates a currently Active fault code. However, not all fault codes will turn on the Service Lamp.
• A Service Lamp that is continuously illuminated indicates a failure of the TECU.

Hill Start Aid (HSA) Lamp

The Hill Start Aid (HSA) lamp flashes when the Hill Start Aid is turned off. The Hill Start Aid (HSA) defaults to the “On” position. In Heavy-Duty UltraShift PLUS models, HSA can be turned “Off” by pressing and releasing the HSA Switch.

Gear Display Descriptions

Solid “N” in Gear Display

Indicates that the transmission is currently in Neutral.

Flashing “F” in Gear Display

Indicates that the transmission has detected an Active fault code. This fault code can be accessed with the ServiceRanger diagnostic software. See Fault Code Isolation Procedure Index.

Double Stars “* *” in Gear Display

Indicates that the gear display is receiving no communication over the data link. The gear display may communicate over the J1939 or J1587 data link depending upon the specific display type. See Diagnostic Procedure. If no problem is found, troubleshoot the gear display connection to the J1939 or J1587 data link per OEM guidelines.

Double Dashes “- -” in Gear Display

Indicates that the gear display has lost communication with the TECU over the data link. The gear display may communicate over the J1939 or J1587 data link depending upon the specific display type. See Diagnostic Procedure. If no problem is found, troubleshoot the gear display connection to the J1939 or J1587 data link per OEM guidelines.

Blank Gear Display

Indicates that the gear display has lost power or has lost communication with the TECU over the data link. See Diagnostic Procedure. If no problem is found, troubleshoot the gear display power and ground supply per OEM guidelines.

“PD” in Gear Display

Indicates that the transmission is in Product Diagnostic (PD) Mode. See Product Diagnostic (PD) Mode.

“CA” in Gear Display

Indicates that a clutch abuse event is occurring.

“AN” in Gear Display

Indicates that the transmission is currently in Auto Neutral.

“GI” in Gear Display

Indicates that the clutch released bearing will need to be greased soon. See the Heavy-Duty Clutch Service Manual (CLSM0200).

“ST” in Gear Display

Indicates that the driver has recorded a Driver Triggered Snapshot. Snapshot is a diagnostic tool used to capture specific data at the time an event is happening. This data should be collected and reviewed at the direction of Eaton.

To collect a Driver Triggered Snapshot using a Push Button Shift Control or Cobra Lever:

• Drive or operate vehicle and attempt to duplicate the shift complaint.
  Notice

  The purpose of this test is to duplicate the complaint and set a fault code or capture a driver triggered snapshot of the event happening.
• If the shift complaint is duplicated, capture a Driver Triggered Snapshot of the event by performing the procedure below:
  • Place the transmission shift device into Low (L) mode and quickly depress the upshift button twice.
    Notice

    Capturing the driver triggered snapshot is time sensitive; for the best results, perform this sequence immediately after the symptom occurs.
• The transmission will set a tone and the letters “ST” will appear in the display if the Snapshot is captured.
• If the Snapshot was initiated while driving, return the transmission shift device to the mode that was selected prior to initiating the Snapshot.

To collect a Driver Triggered Snapshot using an OEM Shift Stalk:

• Drive or operate vehicle and attempt to duplicate the shift complaint.
  Notice

  The purpose of this test is to duplicate the complaint and set a fault code or capture a driver triggered snapshot of the event happening.
• If the shift complaint is duplicated, capture a Driver Triggered Snapshot of the event by initiating the following procedure utilizing the OEM Shif‘ m t Stalk:
  • Upshift, downshift, upshift, downshift (up, down, up, down).
    Notice

    Capturing the driver triggered snapshot is time sensitive; for the best results, perform this sequence immediately after the symptom occurs.
• The transmission will set a tone and the letters “ST” will appear in the display if the Snapshot is captured.

  Note: The Driver Triggered Snapshot data can be retrieved with ServiceRanger and sent to Eaton for review.

• Key off and allow the transmission to perform a complete power down.
• Key on with engine off.
• Connect ServiceRanger.
• Retrieve Snapshot and VPA data by creating a Service Activity Report and select “Send to Eaton”.
• Contact Eaton at (800) 826-4357 for review.