Spicer TPCS Troubleshooting Guide - Manual (Page 54)

51
Service Codes
Code: No Code
Type: Miscellaneous
Although the Tire Pressure Control System is self-diagnosing,
there are some problems that may not trigger a service code.
The following chart lists these conditions along with possible
causes and solutions:
Condition
Operating problems that do not
trigger a service code.
Possible Causes*
Since a service code was not set, these
conditions may be universal and not
call for a troubleshooting routine.
Service
Where fault codes appear, refer to the
troubleshooting procedures listed
under that code.
DRIVER INTERFACE (DDM or OCP)
Intermittent Driver Interface operation. Intermittent ground or power connection
to Driver Interface or Electronic Control
Unit. Follow troubleshooting for 4C! group.
No operation (blank display). - Fuses.
- Faulty ground or power connection.
- Check fuses.
- Repair power/ground.
Blank Driver Interface. - No power to Driver Interface.
- Bad ground to Driver Interface.
- Bad switched ignition line to Driver
Interface.
- Faulty Driver Interface.
- Voltage out of range (9-18 volts).
Follow troubleshooting for 4C! group.
Operator Control Panel display is always
dim and no backlighting on Operator
Control Panel buttons. Lamp 2 wire is disconnected. It should
be grounded for "bright" and tied to +12V
for "dim" and backlight. See wiring schematic or Installation
Guide.
System loses programmed tire
pressure settings.
- Intermittent connection at config
connector.
- Improperly followed programming
procedure.
- Faulty Electronic Control Unit.
- See wiring schematic.
- Reference programming procedure.
- Replace Electronic Control Unit.
No display of pressures on Operator
Control Panel. Operator Control Panel is in Quiet Mode. Refer to "Select Key" in section 3 of
Operator Instructions.
No display of pressures and no
apparent inflate or deflate.
Pressure switch not closed. Follow troubleshooting for 7P! group.
ECU left in DIAGNOSTIC mode. Move vehicle > 5mph.
* Possible causes are listed in order of likely occurrence.