Kenworth SmartWheel KM816010, Руководство по устранению неисправностей

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(01/02) KM816010 Page 23 of 44
MAINTENANCE MANUAL
Kenworth SmartWheel Troubleshooting Guide
16
D. Cruise Control Does Not Work
D1. Symptom: Cruise Control will not turn on.
D1-1. Possible cause: No ignition power to electronics module.
D1-2. Possible cause: Problem in cruise control wiring.
Check Result What To Do Next
D1 -1 A
Turn on ignition. Push and release
cruise control On switch. Check if
LED over switch is on. LED on. Go to D1-2 .
LED on only when button held
down.
Go to D1-1B .
LED does not turn on. Go to A1 .
D1-1 B
Unplug 6-way connector from elec-
tronics module. Check voltage
between connector pins 4 and 3 with
ignition on. Voltmeter reads battery voltage. Go to A3 .
No voltage. Go to D 1-1C .
D1 -1 C
Check circuit breaker or fuse in
power distribution box position
Spare 33. Circuit breaker/fuse OK. There is an open circuit from the
power distribution box to electronics
module. Trace circuit PCB 33.
Circuit breaker bad/fuse blown. Replace ckt breaker or fuse. Deter-
mine cause for fuse to blow.
Check Result What To Do Next
D1 -2A
Check cruise ckt between pin 14 of
14-way connector at electronics
module and engine ECM. DDEC:
Ckt 953, CAT: Ckt
C993, Cummins: Ckt 588.
Also check jumper (pin 10 to 13) Wiring, connectors OK all circuits
have continuity. Go to D1-3.
Wire broken, connector unplugged,
loose or corroded. Repair or replace wires and/or con-
nectors.