Endurant HD
TRTS0950 EN-US
|
November 2024 - B

Fault Code 158: XBR Active Control Mode

J1939: SA 3 SPN 2918 FMI 9, 13, 19

Overview

The Transmission Control Module (TCM) receives the vehicle’s eXternal Brake Request (XBR) Active Control Mode message over the Primary Data Link. This information is used to determine transmission operation.

Detection

The TCM monitors the XBR Active Control Mode message. If a failure is detected the fault is set Active.

Conditions to Set Fault Code Active

FMI 9 - Abnormal Update Rate: XBR Active Control Mode message not received for 5 seconds.

FMI 13 - Out of Calibration: XBR Active Control Mode message not available for 5 seconds.

FMI 19: XBR Active Control Mode message invalid for 5 seconds.

Fallback

FMI 9, 13, 19:

  • Amber warning lamp on
  • Urge to Move and Creep Mode Prohibited

Conditions to Set Fault Code Inactive

FMI 9, 13, 19: XBR Active Control Mode message valid for 10 seconds.

Possible Causes

FMI 9, 13, 19:

  • Vehicle Components
    • Module(s)
    • Primary Data Link

Additional Tools

  • None

Fault Code 158 Troubleshooting

A
Purpose:Check for Active or Inactive fault codes.

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

  • If Fault Code 158 is Inactive and there are other Active vehicle or transmission fault codes, troubleshoot all Active fault codes. Go to Step V

  • If Fault Code 158 FMI 13 is Active, Go to Step B

  • If Fault Code 158 FMI 13 is Inactive, the XBR Active Control Mode message is available. Go to Step V

  • If Fault Code 158 FMI 9 or 19 is Active or Inactive, refer to OEM guidelines regarding XBR Active Control Mode message repair or replacement. Go to Step V

B
Purpose:Verify External Braking Integration configuration with ServiceRanger and availability of vehicle XBR Active Control Mode message.

  1. Key on.

  2. Connect ServiceRanger.

  3. Go To “Configurations”.

  4. Select “Vehicle”.

  5. Record External Braking Integration Current Value.

  6. Refer to OEM and verify availability of the vehicle XBR Active Control Mode SPN 2918 message.

  • If the vehicle XBR Active Control Mode SPN 2918 message is available, refer to OEM and enable vehicle XBR Active Control Mode SPN 2918 message. Go to Step V

  • If the vehicle XBR Active Control Mode SPN 2918 message is not available and the External Braking Integration Current Value in ServiceRanger indicates “Supported”, select “Not Supported” and follow on-screen prompts. Go to Step V

V
Purpose:Verify Repair.

  1. Key off.

  2. Reconnect all connectors and verify that 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.