Proheat M125 User Manual
Page 74
4-37
PROHEAT M-SERIES G-II PCM SERVICE MANUAL
MOUNTING BOLTS (2) TORQUE = SEE SECTION 1.3
COOLANT PUMP
SWITCH INPUT
DUAL MODE TEMP
SENSOR
POWER
FUEL INLET
Figure 4-39: Burner Head Removal and Motor Mechanical Check.
FUSE COVER AND FUSE
Procedure – G-II PCM fuse replacement:
a)
Disconnect all harnesses at the G-II PCM.
b)
Disconnect the fuel supply line.
ci)
G-II PCM—Locate and measure across pins C and E in the G-II 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-II PCM is faulty. Go to G-II PCM replacement, page 4-38
If the voltage falls below the required voltage when the Motor starts,
check the wiring from the supply source to the PROHEAT G-II PCM.
Figure 4-38: G-II PCM Datalink Connection.
G-II PCM DATALINK
CONNECTION
G
E
F
B
C
RED (+)
BLACK (-)