RELS, signal incorrectly low
â–¶ How to fix
Check that there is no damage or short circuits in the external cable harness, particularly the cable to pin 23 which activates the function. If no fault is detected, contact an Allison dealer.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
The control unit is calibrated to receive a RELS signal and detects an acceleration while RELS is active.
Possible cause
This fault may be caused by a fault on the cable harness or fault on the control unit.