Park Smart System Diagnostic Table
TRUCK MUST BE IN PARKED MODE TO PERFORM
DIAGNOSTIC TESTS!
For additional wiring diagrams and J1939 fault codes see Freightliner doc
# C02.03
CORRECTIVE ACTION / SEE APPENDIX
Unit Will Not Run or Turn
On
1. Loose connection
2. No power is available at the
unit.
3. F6 programming fuse has been
installed
4. Blown fuse or fuses
5. Defective AUX Control panel.
6. Lost signal to Aux Control
Panel -WAKE UP
7. Control PCB Assembly
defective.
8. Park Switch defective or wrong
logics.
9. No 12 volts to pin C3 battery
sense.
10. Broken wire or defective wire
harness
11. Parked button illuminates for a
couple of seconds but unit does
not run.
1. Confirm all connections are tight, including ground lugs,
and terminals crimped on wires and battery cables.
2. Check AUX batteries for voltage. Low voltage cut out
11.3
3. Remove F6 programming fuse and cycle power off to
reset.
4. Check F2 fuse for continuity and/or voltage and 12 volt
input at pin C1 on Control PCB Assembly. See appendix
F.
5. Check for 12 volts and ground at AUX control panel.
See appendix C
6. Check Wake up signal pin D6 on Control PCB
Assembly. See appendix C and /or I.
7. Test Control PCB Assembly. See appendix I
8. Truck parked 0 volts to pin C4. Brakes released 12 volt
to pin C4. Check for input. See Appendix I
9. Check unfused 12 volt power signal from Aux batteries
to C3. See appendix I
10. Inspect all wiring and harness connections.
11. Check for loss of communication on Can Bus J1939.
Check for loss of wake up signal (switched to ground)
from control to pin D6 on Control PCB Assembly. See
appendix C
Unit runs in parked mode
but not engine running
mode.
1. Broken wire to relay to LS1
and/or LS2 relays
2. LS1 and / or LS2 relay
defective
3. Fuse F2 blown
4. Lost output (ground) from
Control PCB Assembly pin D10
and/ or D11 going to LS1 and
LS2 relays.
1. Inspect all wiring and harness connections.
2. Check connections and test both relays. See appendix D
3. Check fuse. See appendix F
4. Determine if ground from Control PCB Assembly has
failed. See appendix I
Unit runs in Engine On
mode, but not Engine Off
1. Low Aux Batteries
2. Park Brake Signal
3. Wake Up Signal
4. Relays LS3/LS4
5. Wiring Harness
6. Heater Enable Signal
1. Check Aux batteries and battery separator. See
Appendix A & B
2. Park brake switch defective, wiring harness issue or
wrong switch logics
3. Loss of wake up signal. Check Aux control panel and
control PCB Assy. See Appendix C & I.
4. Check relays and wiring. See Appendix D
5. Check wiring harness connectors and physical condition.
6. Check for Aux battery voltage (12V) at the control PCB
Assy pin C3.
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