Proheat M80 User Manual
Page 61
PROHEAT G-I PCM SERVICE MANUAL
4-30
Procedure – Low voltage testing:
a)
Inspect the wiring harnesses and connections for corrosion and proper
fit. Clean if necessary.
b)
Using a multimeter set for voltage, measure across the positive and
negative battery terminals or at the supply source.
If the voltage is below the required voltage, service the batteries and/or
charging system as per OEM supplier recommendations.
If the voltage level is within the operating range, go to item 'c'.
c)
Locate and measure across pins D and B in the G-I PCM Data Link
connection. Perform this with the PROHEAT off and then switched on.
If the voltage is within the operating range and a Voltage diagnostic code
is indicated, the G-I PCM is faulty. Go to G-I PCM replacement, page 4-41
If the voltage falls below the required voltage when the Motor starts,
check the wiring from the supply source to the PROHEAT G-I PCM.
Figure 4-36: G-I PCM Datalink Connection
G-I PCM DATALINK
CONNECTION
F
D
E
A
C
B
RED (+)
Figure 4-35: Voltage Measurement
TO PROHEAT
BLACK (-)