Spicer TPCS Troubleshooting Guide: Older Systems (ECU's w_Dual Connectors) - Manual (Page 50)

50
Troubleshooting
Air Pressure Check
Note that the Tire Pressure Control System is not continuously
pressurized; pressure checks occur on a periodic basis. During tire
pressure checks, the system delivers compressed air to each channel
for approxi mately two seconds while monitoring the pressure in that
channel.
Code Description
Code 11P! indicates that either the tire pressure on one tire was
read lower than the other tires on that channel, or there is an air leak
someplace in the system.
Low tire pressure can be caused by a damaged tire, plugged wheel valve
filter or leaking air lines. An air leak can be located either before or after
the wheel valve.
The components located before the wheel valve that may cause a code
11P! include:
• Leaking control lines
• Restricted wheel valve exhaust port
• Leaking wheel air seals
Components located after the wheel valve that may cause a code 11P!
include:
• Damaged tire
• Rim leaks
• Leaking air lines
• Wheel valve damage.
To correctly diagnose the faulty component, connect the Diagnostic
Tool (see Section 5 for test equipment and descriptions) and follow the
procedure in the 11P! troubleshooting tree.
See “Troubleshooting Tips” on page 20 for general guidelines on system
diagnostics.
Code:
11P!
Type:
Tire Leak (Imbalance)