Fault Code 154: Hill Holder Mode
J1939: SA 3 SPN 2912 FMI 9, 13, 19
Overview
The Transmission Control Module (TCM) receives the vehicle’s Hill Holder Mode message over the Primary Data Link. This information is used to determine transmission operation.
Detection
The TCM monitors the Hill Holder Mode message. If a failure is detected the fault is set Active.
Conditions to Set Fault Code Active
FMI 9 - Abnormal Update Rate: Hill Holder Mode message not received for 5 seconds.
FMI 13 - Out of Calibration: Hill Holder Mode message not available for 5 seconds.
FMI 19: Hill Holder Mode message invalid for 5 seconds.
Fallback
FMI 9, 13, 19:
- Amber warning lamp on
- Hill Start Aid prohibited
Conditions to Set Fault Code Inactive
FMI 9, 13, 19: Hill Holder Mode message.
Possible Causes
FMI 9, 13, 19:
- Vehicle Components
- Module(s)
- Hill Holder Mode
- Primary Data Link
Additional Tools
- None
Fault Code 154 Troubleshooting
Record the transmission fault codes, FMIs, occurrences, and timestamps from the Service Activity Report created during the Diagnostic Procedure.
If Fault Code 154 is Inactive and there are other Active vehicle or transmission fault codes, troubleshoot all Active fault codes. Go to Step V
If Fault Code 154 FMI 13 is Active, refer to OEM and enable vehicle Hill Holder Mode SPN 2912. Go to Step V
If Fault Code 154 FMI 13 is Inactive, Go to Step V
If Fault Code 154 FMI 9 or 19 is Active or Inactive, refer to OEM guidelines regarding Hill Holder Mode repair or replacement. Go to Step V
Key off.
Reconnect all connectors and verify that all components are properly installed.
Key on with engine off.
Connect ServiceRanger.
Go to “Fault Codes”.
Select “Clear All Faults”.
Operate vehicle and attempt to reset the fault code or duplicate the previous complaint.
Check for fault codes using ServiceRanger.
If no fault codes set and the vehicle operates properly, test complete.
If Fault Code 154 sets Active during operation, Go to Step A
If a fault code other than 154 sets Active, troubleshoot per Fault Code Isolation Procedure Index.