Overview:This code indicates the transmission is unable to complete a shift across the range. The range is either stuck in HI or LO, or cannot complete engagement in HI or LO. Detection:The transmission attempts the same range shift five consecutive times and determines the shift cannot be completed based on the speeds across the back box. Fallback:This fault causes a 5-speed fallback and the transmission stays in either LO range or HI range. When the vehicle comes to a stop, an attempt to shift into LO range is made. Required Tools:1) Basic Hand Tools2) (2) 0-100 PSI Air Pressure Gauges3)...

Overview:This code indicates the transmission is unable to complete a shift across the splitter. The splitter is either stuck in HI or LO, or cannot complete engagement in HI or LO. Detection:The transmission attempts the same splitter shift five consecutive times and determines the shift cannot be completed based on the speeds across the back box. Fallback:This fault causes a 9-speed fallback and the transmission stays in either LO split or HI split. Required Tools:1) Basic Hand Tools2) (2) 0-100 PSI Air Pressure Gauges3) AutoSelect/AutoShift Troubleshooting Guide Possible Causes:1) Low air pressure2) Contaminated air supply3) Air leak4) Splitter solenoid stuck5)...

Overview:This code indicates an electrical failure of the solenoids that control the pneumatic range valve. Detection:Starting at key-on and throughout operation, the Transmission Controller constantly measures this circuit. A failure mode of short to battery, short to ground, or open circuit is detected. Fallback:This fault causes a 5-speed fallback and the transmission stays in either LO range or HI range. When the vehicle comes to a stop, an attempt to shift into LO range is made. Required Tools:1) Basic Hand Tools2) Digital Volt/Ohm Meter3) AutoSelect/AutoShift Troubleshooting Guide Possible Causes:1) Range solenoid coil open or shorted2) Damaged transmission harness3) Malfunctioning transmission...

Overview:This code indicates an electrical failure of the solenoids that control the pneumatic range valve. Detection:Starting at key-on and throughout operation, the Transmission Controller constantly measures this circuit. A failure mode of short to battery, short to ground, or open circuit is detected. Fallback:This fault causes a 5-speed fallback and the transmission stays in either LO range or HI range. When the vehicle comes to a stop, an attempt to shift into LO range is made. Required Tools:1) Basic Hand Tools2) Digital Volt/Ohm Meter3) AutoSelect/AutoShift Troubleshooting Guide Possible Causes:1) Range solenoid coil open or shorted2) Damaged transmission harness3) Malfunctioning transmission...

Overview:This code indicates an electrical failure of the solenoids that control the pneumatic range valve. Detection:Starting at key-on and throughout operation, the Transmission Controller constantly measures this circuit. A failure mode of short to battery, short to ground, or open circuit is detected. Fallback:This fault causes a 5-speed fallback and the transmission stays in either LO range or HI range. When the vehicle comes to a stop, an attempt to shift into LO range is made. Required Tools:1) Basic Hand Tools2) Digital Volt/Ohm Meter3) AutoSelect/AutoShift Troubleshooting Guide Possible Causes:1) Range solenoid coil open or shorted2) Damaged transmission harness3) Malfunctioning transmission...