Endurant XD
TRTS0960 EN-US
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December 2024 - D

Fault Code 188: Source Address (SA) of Controlling Device for Engine Control

J1939: SA 3 SPN 1483 FMI 12, 13, 19

Overview

The Transmission Control Module (TCM) sends and receives the Source Address of Controlling Device for Engine Control message to and from a vehicle Electronic Control Unit (ECU) over the Primary Data Link (J1939A). This message is used by the TCM to confirm the Engine ECU is receiving messages and responding to its messages.

Detection

The TCM monitors Source Address of Controlling Device for Engine Control messages. If messages are not received or are invalid, the fault is set Active.

Conditions to Set Fault Code Active

FMI 12 – Bad Intelligent Device: Engine ECU did not respond TCM command messages for 5 seconds.

FMI 13 – Out Of Calibration: Source Address of Controlling Device for Engine Control message not available for 5 seconds.

FMI 19 – Received Network Data In Error: Source Address of Controlling Device for Engine Control message received but in error for 5 seconds.

Fallback

FMI 12, 13, 19:

  • Amber warning lamp on

Note: Vehicle may have additional fallback modes. Refer to OEM.

Conditions to Set Fault Code Inactive

FMI 12: Engine ECU responding to TCM messages for 1 second.

FMI 13, 19: Source Address of Controlling Device for Engine Control messages available and valid for 10 seconds.

Possible Causes

FMI 12, 13, 19:

• Vehicle Components

  • Vehicle Components
    • Source Address of Controlling Device for Engine Control message not enabled
    • Engine ECU mis-configured or internal failure
    • Other vehicle ECU(s) faulted
  • Vehicle Harness - Primary Data Link (J1939A)
    • Wiring shorted to power, shorted to ground or open
    • Terminals bent, spread, corroded, or loose

Note: Refer to OEM for troubleshooting a failed system.

Additional Tools

  • None

Fault Code 188 Troubleshooting

A
Purpose:Check for Active or Inactive fault codes.

  1. Set the vehicle parking brake and chock wheels.

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

  • If Fault Code 188 is Inactive and there are other Active vehicle or transmission fault codes, troubleshoot all Active fault codes. Go to Step V

  • If Fault Code 188 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 188 FMI 13 is Active, refer to OEM and enable vehicle Source Address of Engine Controlling Device message (SPN 1483). Go to Step V

  • If Fault Code 188 FMI 13 is Inactive, Go to Step V

  • If Fault Code 188 FMI 19 is Active or Inactive, refer to OEM guidelines for repair of the Source Address of Engine Controlling Device message (SPN 1483). Go to Step V

V
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 reset the fault code or duplicate the previous complaint.

  8. Check for fault codes using ServiceRanger.