Spicer TPCS (Tire Pressure Control System) Operator Control Panel (OCP) User Manual
Spicer

TPCS Service Code Summary
Pneumatic Codes
1P!
No Deflate Modes
No deflate allowed
Hose or seal leaks, or contaminated PCU
2P!
Deflate Trend
Inflate only
Failed to deflate properly. Contaminated PCU
3P!
Vacuum Generation
No operation
Contaminated PCU
4P!*
Between Modes
Channel checks pressure
Slow inflate or deflate: Restricted hoses, dryer or compressor
5P!
Low Pressure
Channel checks pressure
Large hose or seal leak
7P!
No Air Supply
Non-operative
Compressor cutout too low or bad pressure switch or connection
8P!
Pressure Reading
Non-operative
Bad pressure sensor or connection
9P!
Inflate Trend
Channel disabled
Lost pressure during inflate: Damaged tire or leaking hoses, seals or wheel valve
10P!*
Tire Leak
Channel disabled
Damaged tire, leaking wheel valve hose or wheel valve stuck open
11P!*
Tire Leak
Channel disabled
Damaged tire, leaking hoses or seals
No Codes
Blank OCP
Non-operative
Blown fuse or poor electrical connection
Faulty Trailer Detect
No trailer on display
Wheel valve not shut off
Faulty Trailer Detect
Continuous trailer on display
Trailer coupling leak
Electrical Codes
System Effect
Possible Causes
1C!
Power
No operation
Low Power
3C!
Speed Sensor
Inflate Only
Bad connection or no speed signal
5C!
PCU Sensor
No operation
PCU sensor damaged or poor electrical connection
7-12C!
PCU Solenoid
No operation
Solenoid does not pass electrical diagnostics
* Indicates RUN FLAT will override - check tires before proceeding.
Spicer
®
TPCS (Tire Pressure Control System)
Operator Control Panel (OCP)