Spicer CTIS (Central Tire Inflation System) Troubleshooting Guide - Manual (Page 53)

50
Service Codes
Configuration Error
Configuration Error
No
Use electrical schematic and truck build information
to determine appropriate harness configuration.
Disconnect ECU from harness.
Is Config 1
connected
properly?
Fault is not active. Reverify flowchart
steps and wait for fault to reoccur.
Repair harness and/or
config plug and retest.
If pressure targets, etc. were
previously changed, reprogram them.
Note: ECUs are not a typical cause of problems; however, if this fault reoccurs multiple times
and wiring harness has been confirmed to be good, ECU replacement may be necessary.
Yes
Yes
No
Is ECU
connector
round?
At round ECU harness connector,
check for proper connection of Config
1 (pin Z) to one of the following
(based on appropriate config plug):
Ground (pin F)
Power (pin H)
Float (no connection)
At rectangular ECU harness connector,
check for proper connection of Config 1
(pin G1) to one of the following (based
on appropriate config plug):
Ground (pin K2)
Power (pin K1)
Float (no connection)
Yes No
Is ECU
connector
round?
At round ECU harness connector,
check for proper connection of Config
2 (pin M) to one of the following
(based on appropriate config plug):
Ground (pin F)
Power (pin H)
Float (no connection)
Yes No
At rectangular ECU harness connector,
check for proper connection of Config 2
(pin G2) to one of the following (based
on appropriate config plug):
Ground (pin K2)
Power (pin K1)
Float (no connection)
Is Config 2
connected
properly?
Press HWY and RUN FLAT together.
Did display
return to normal?
No
Yes
Use truck build information to determine
appropriate OEM config file.
Download OEM config file to ECU
using PC diagnostics.
Retest.