DANA-AXTS0015
DANA SPICER CTIS (CENTRAL TIRE INFLATION SYSTEM)
TROUBLESHOOTING GUIDE
JULY 2010
DANA-AXTS0015 - Page 46 of 72
43
Service Codes
No Terrain Lights or DDM – Dashes "--"
(Codes 51, 52, 54, 55, 56)
Type: PCU Solenoid
(Supply, Deflate, Control, Front, or Rear)
Code Description
A “Solenoid Fault” code indicates an electrical fault in the
Pneumatic Control Unit (PCU). System operation is disabled
when these faults are detected.
The system shuts down in a fail-safe mode and turns off the
power to the solenoids.
The troubleshooting tree first tests internal solenoid circuitry.
Resistance outside the specified range of 30 to 80 ohms indi-
cates a defective solenoid. Succeeding steps check continuity
of the wire harness circuits between the PCU and the Elec-
tronic Control Unit (ECU). If the problem can be traced to a
faulty circuit or connector, make the necessary repairs. If the
troubleshooting routine leads to a problem with the solenoid
itself, the PCU must be repaired or replaced. If both the sole-
noid and the circuitry check out OK, the ECU is faulty.
See “Troubleshooting Tips” for general guidelines on system
diagnostics.
System Mode
Condition
Possible Causes (listed in order of likely occurrence)
No Operation
PCU solenoid failed electri-
cal diagnostic test
• Solenoid wire shorted to ground
• Solenoid wire shorted to power
• Faulty solenoid
• Faulty ECU
PCU Compo
n
e
n
t Co
nn
ecto
r
ECU Ha
rn
e
ss
Co
nn
ecto
r
PCU Ha
rn
e
ss
Co
nn
ecto
r
ABCDE
ABCDE
ABCDE
FGHJK
3
2
1
FGHJK
FGHJK
– o
r
–
Back to Top
