Endurant XD
TRTS0960 EN-US
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September 2024 - A

Fault Code 212: Transmission Oil Temperature (Fluid Temperature Sensor)

J1939: SA 3 SPN 177 FMI 0, 2, 4, 5, 6, 10, 15, 16

Overview

The Endurant XD Series transmissions are equipped with a Fluid Temperature Sensor (FTS) to monitor sump oil temperature. Sump oil temperature represents the overall operating temperature of the transmission. The FTS provides a temperature input to the Transmission Control Module (TCM). The TCM monitors oil temperature to ensure the transmission is being properly cooled and lubricated. If the oil temperature is extreme, the TCM will adjust transmission operation to perform properly and prevent damage. The normal temperature operating range is 86 - 250°F (30 - 121°C). The FTS is mounted in the Mechatronic Transmission Module (MTM) and connected to the TCM at the 74-way Transmission Harness Connector.

Detection

The TCM monitors the FTS oil temperature signal. If oil temperature is outside of normal operating range or 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): Transmission oil temperature greater than 275°F (135°C) for 10 seconds.

FMI 2 – Data Erratic: Transmission oil temperature out of range, greater than 302°F (150°C) or less than -41.8°F (-41°C), for 5 seconds.

FMI 4 - Voltage Below Normal or Shorted Low: FTS circuit shorted to ground for 5 seconds.

FMI 5 - Current Below Normal or Open Circuit: FTS circuit open or shorted to power for 5 seconds.

FMI 6 - Current Above Normal or Shorted Circuit: FTS reference voltage not between 4.75V to 5.25V for 5 seconds.

FMI 10 - Abnormal Rate of Change: Transmission Oil Temperature rate of change greater than 20°F (11°C) per second.

FMI 15 - Data Valid but Above Normal (Least Severe): Transmission oil temperature greater than 252°F (122°C) for 15 minutes or above 273°F (134°C) for 1 minute.

FMI 16 – Data Valid but Above Normal (Moderately Severe): Transmission oil temperature greater than 252°F (122°C) for 30 minutes or above 273°F (134°C) for 2 minutes.

Fallback

FMI 0, 15, 16

  • Amber warning lamp on (OEM specific)
  • Red stop lamp on (OEM specific)
  • Shift performance may be degraded

FMI 2, 4, 5, 6, 10

  • Amber warning lamp on (OEM specific)
  • No degraded modes

Conditions to Set Fault Code Inactive

FMI 0, 15, 16: Transmission oil temperature below 252°F (122° C) for 1 minute.

FMI 2: Transmission oil temperature in range for 10 seconds.

FMI 4: FTS circuit not shorted to ground for 10 seconds.

FMI 5: FTS circuit not open or shorted to power for 10 seconds.

FMI 6: FTS reference voltage in range for 10 seconds.

FMI 10: Key cycle and fault condition no longer exists.

Possible Causes

FMI 0, 15, 16:

  • Low transmission oil level
    • Not properly filled
    • Leak
  • FTS not configured in the TCM
    • Replacement TCM installed
  • FTS
    • Internal failure
  • Internal transmission
    • Lubrication system mechanical failure

FMI 2, 4, 5, 6, 10:

  • FTS
    • Internal Failure
  • MTM Harness
    • Wiring shorted to power, shorted to ground or open
  • TCM
    • Internal failure

Additional Tools

  • Endurant XD Service Manual TRSM0960
  • Non-contact (infrared) temperature gun
  • Digital Volt/Ohm Meter (DVOM)

Fault Code 212 Troubleshooting

A
Purpose:Check for active or inactive fault codes.

  1. Set vehicle parking brake and chock wheels.

  2. Record transmission fault codes, FMIs, occurrences, and timestamps from the Service Activity Report created during the Diagnostic Procedure.

  • If Fault Code 212 FMI 0, 15, 16 is Active or Inactive, Go to Step B

  • If Fault Code 212 FMI 2, 4, 5, 6, 10 is Active or Inactive, Go to Step D

B
Purpose:Verify transmission oil level and inspect for leaks.

  1. Key off.

  2. Perform Oil Level Inspection Procedure.

    Note: Reference Endurant XD Service Manual TRSM0960, Oil Level Inspection Procedure.

  • If FMI 0, 15, 16 and transmission oil level is in range, FTS indicated a higher than expected oil sump temperature. Check external transmission cooler system operation. Go to Step V

    Note: An external transmission oil cooler system is required when vehicle Gross Combination Weight (GCW) exceeds 110,000 lbs (50 Metric Tons).

  • If FMI 0,15,16 and transmission oil level is out of range, Go to Step C

C
Purpose:Verify residual transmission oil and inspect internal transmission.

  1. Key off.

  2. Perform Oil Drain Removal.

    Note: Place a suitable container under Oil Drain Plug.

    Note: Reference Endurant XD Service Manual TRSM0960, Oil Drain Removal Service Procedure.

  3. Record residual oil volume in table.

  4. Remove PTO cover and inspect for damage.

  • Contact Eaton Cummins Automated Transmission Technologies at +1 800-826-4357 for further diagnostic instructions. Go to Step V

Residual Oil Volume
D
Purpose:Verify condition of TCM 74-Way Connector.

  1. Key off.

  2. Remove TCM from MTM with 20-Way TCM Vehicle Harness Connector and 20-Way TCM Body Harness Connector connected.

    _Graphics/LineArt/TRTS0950_FC511_Check74WayTCM.png

  3. Inspect TCM side of the 74-Way Transmission Harness Connector, verify connector is free from contamination and corrosion; terminals are not bent, spread or loose; and there is no damage to connector body.

  4. Inspect TCM Seal, verify seal is properly installed and there is no damage.

E
Purpose:Verify TCM Fluid Temperature Sensor reference voltage.

  1. Key off.

  2. Connect Eaton Breakout Box with 74-Way Eaton Diagnostic Adapter to TCM 74-Way Connector.

    _Graphics/LineArt/TRTS0950_BreakoutBoxtoTCM.png

  3. Key on with engine off.

  4. Measure voltage at Eaton Breakout Box between Pin 33 and Pin 43. Record reading in table.

    _Graphics/LineArt/TRTS0960_FC212_Pin33and43.png

  5. Compare reading(s) in table.

Ignition StatePinsRangeReading(s)
Key on33 to 434.75–5.25 V
F
Purpose:Verify TFS not shorted to ground.

  1. Key off.

  2. Connect Eaton Breakout Box with 74-Way Eaton Diagnostic Adapter to MTM side of 74-Way Transmission Harness Connector.

    _Graphics/LineArt/TRTS0950_BreakoutBoxtoMTM.png

  3. Measure resistance at Eaton Breakout Box between Pin 33 and Ground (TCM mounting stud). Record reading in table.

    _Graphics/LineArt/TRTS0960_FC212_DVOM33andGND.png
PinsRangeReading(s)
33 to GroundOpen Circuit (OL)
G
Purpose:Verify Resistance of FTS Compared to Main Case Temperature.

  1. Key off.

  2. Use Non-contact (infrared) temperature gun to measure main case temperature in area indicated. Record reading in table.

    _Graphics/LineArt/TRTS0960_TempCheck_XD.png

  3. Use Temperature/TFS Resistance Range chart to determine expected FTS resistance range based on Main Case Temperature. Record Resistance Range in table.

    Note: Results may not be an exact match.

    _Graphics/Raster/FC212_StepG_OilTempResistanceRange.png

  4. Measure resistance at Eaton Breakout Box between Pin 33 and Pin 43. Record reading in table.

    _Graphics/LineArt/TRTS0960_FC212_Pin33and43.png
Main Case TemperatureTFS Resistance Range PinsReading(s)
33 to 43
H
Purpose:Check for Active or Inactive fault codes.

  1. Key off.

  2. Remove 74-Way Eaton Diagnostic Adapter from MTM.

  3. Reinstall TCM to MTM.

  4. Reconnect all connectors and verify all components are properly installed.

  5. Key on with engine off.

  6. Connect ServiceRanger.

  7. Retrieve and record transmission fault codes, FMIs, occurrences, and timestamps.

V
Purpose:Purpose: Verify repair.

  1. Key off.

  2. Reconnect all connectors and verify all components are properly installed.

  3. Key on with engine off.

  4. Connect ServiceRanger.

  5. Go to "Fault Codes".

  6. Select "Clear All Faults".

  7. Operate vehicle and attempt to set the fault code or duplicate the previous complaint.

  8. Check for fault codes using ServiceRanger:

  • If no codes set and vehicle operates properly, test complete.

  • If Fault Code 212 sets Active, Go to Step A

  • If a fault code other than 212 sets Active, troubleshoot per Fault Code Isolation Procedure Index on page 13.