Electronic Control System Signature, ISX and QSX15 Engines – FAULT CODE 536

Autoshift Low Gear Actuator (Lockout Solenoid) Circuit


Fault Code: 536
PID: S044
SPN: 718
FMI: 11/11
LAMP: Yellow

Either low voltage detected on autoshift low gear actuator circuit when (+) 12 VDC are commanded or voltage detected when no voltage is commanded.

Top 2 lockout solenoid will not function properly. Transmission will not shift properly.

Top 2 Lockout Solenoid Circuit

Circuit Description

The autoshift low gear actuator is an ECM-driven solenoid that controls a Top 2 transmission.

Component Location

The autoshift low gear actuator is located on the topside of a transmission toward the back. Use the OEM diagram for a specific location.

Refer to Troubleshooting Fault Code t05-536.

Last Modified:  26-Oct-2010