Solenoid PCS4, open circuit
â–¶ How to fix
Check the cable harness between gearbox and control unit, particularly the cables connected to pins 11 and 55 on the control unit. If no fault is found, 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 has detected open circuit on the PCS4-return circuit.
Possible cause
A possible cause of the fault code may be an open circuit in any of the cables to pins 11 or 55 on the control unit.