Overview

The Endurant HD transmission utilizes the OEM display to indicate the current state of the transmission. Two transmission service lamps, amber and red, may also be illuminated to indicate an issue exists with the transmission system. The service lamps and display are controlled by the Transmission Control Module (TCM) with a message over the vehicles J1939 Data Link.

Transmission Service Lamps

The amber transmission service lamp indicates a least severe issue exists. In the event the amber lamp is illuminated the transmission may experience a degraded mode and requires service as soon as possible. The amber and red transmission service lamps together indicate a most severe issue exists. In the event both the amber and red lamps are illuminated the transmission may experience a degraded mode and requires immediate service.

• Under normal conditions, the transmission service lamps are on momentarily at key-on as part of the TCM self-test.
• A solid transmission service lamp indicates a fault code is currently active. However, not all fault codes will turn on the service lamp.

Display Descriptions

Solid “N” in Display

Indicates that the transmission is currently in Neutral.

Flashing “F” in Display

Indicates that the transmission has detected an Active fault code. This fault code can be accessed with diagnostic software. Go to the Diagnostic Procedure.

Double Stars “* *” in Display

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

Double Dashes “- -” in Display

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

Blank Gear Display

Indicates the display has lost communication over the data link.

“PD” in Display

Indicates that the transmission is in Product Diagnostic (PD) Test. Refer to Product Diagnostic (PD) Test.

“CA” in Display

Indicates that a clutch abuse event is occurring.

“ST” in Display

Indicates a driver triggered snapshot was requested and recorded. Snapshot is a diagnostic tool used to capture specific data at the time an event is occurring. This data should be collected and reviewed at the direction of Eaton Cummins Automated Transmission Technologies.

“CC” in Display

Indicates that a clutch calibration is required or in process.