Table of Contents
Advertisement
C.
AUX Control Panel Testing: Attention! Conduct this test with ENGINE
OFF/ KEY OFF AND BRAKES SET!!!
First, check for proper voltage and signal at the ACU 26 pin connector. You
should have 12 volts across pins 4 (pos) and 5 (neg). You should also have 12
volts at pin 24 (wake up signal). Pushing the parked button switches the 12
volts at pin 24 to ground, signaling the Park Smart unit to operate.
During this test, you should not have 12 volts to pin 6 (ignition signal) and
you must have Can Bus connection for the unit to operate.
D.
Relay Testing
With relay unplugged, confirm there is 12 VOLT
on the sockets where 85 and 30 relay terminals are
connected.
If you do not have 12 VOLT here check fuses, wiring
and battery connections.
Now, with relay unplugged, check across terminals 85 and 86 of the relay,
using an OHM meter. You should have an ohms value between 80 – 100
ohms through the relay coil. If you do not, replace relay.
In Parked mode, as soon as you turn the AUX Control Panel blower switch
on and set the temperature control to cold and push the parked button,
terminals 86 on LS3 and LS4 relays become connected to ground internally on
the Control PCB Assembly pins D12 and D13. When this happens the relays
will pull in the contacts and allow voltage through the relays. You should now
have 12 VOLT passing through the relay on spade terminal 87 of the relay.
This provides power through fuses F1, F4 and F5, to the evaporator blower,
condenser fan and the compressor controlling section of the Control PCB
Assembly.
With relay plugged in: TURN THE UNIT ON IN PARKED MODE. If you do
not have 12 VOLT on terminal 87, check across terminals 85 (+) an 86 (-).
You should have 12 VOLT. If you have 12 VOLT here and do not have 12
VOLT on terminal 87 your relay is defective. The internal coil of the relay is
energized but the contacts are not closing.
(Continued on next page)
86
87
87
30
85
13
Advertisement
Table of Contents
