Kenworth SmartWheel KM816010, Руководство по устранению неисправностей

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(01/02) KM816010 Page 13 of 44
MAINTENANCE MANUAL
Kenworth SmartWheel Troubleshooting Guide
16
B. Horn Does Not Work
B3. Possible cause: Problem in circuit R11HN.
B4. Possible cause: Bad electronics module or steering wheel hub.
Check Result What To Do Next
B3-1
Unplug the 8 way connector from the
multiplex module. Check continuity
of ckt R11 HN from pin 1 of the con-
nector to terminal marked S at horn
relay position in power distribution
box. Ckt has continuity.
No continuity.
Go to B4 .
There is a break in the circuit
between the module and the power
distribution box. Trace ckt R11 HN.
Check Result What To Do Next
B4-1
Plug 8 way connector back into mod-
ule. Locate one way slide terminal in
ckt R11 HN and disconnect.
Check for continuity between R11
HN leading to module and ground
when horn button is pressed. Continuity to gnd when button
pressed.
No continuity.
Problem is in truck wiring. Recheck
circuits R11 HN and C53HN.
Go to A3 .