Proheat M125 - Manual (Page 66)

4-29 PROHEAT M-SERIES G-II PCM SERVICE MANUAL
4.1.10
(9 Flashes)
4.1.9
(8 Flashes)
Figure 4-31: Burner Head Removal and Fuel Solenoid Valve Connection.
FUEL SOLENOID VALVE
CONNECTION
LOCK
WARNING
To avoid the risk of shock and to
ensure that the PROHEAT does not
fire, disconnect the Ignition Module
connector at the G-II PCM.
MOUNTING EARS (2)
MOUNTING BOLTS (2)
TORQUE = SEE SECTION 1.3
COOLANT PUMP
SWITCH INPUT
DUAL MODE TEMP
SENSOR
POWER
FUEL INLET
FUEL SOLENOID VALVE Diagnostic Code 8
Indicates an electrical fault in the Fuel Solenoid Valve coil or in the G-II PCM
Fuel Solenoid Valve circuit.
Troubleshoot the Fuel Solenoid Valve diagnostic code based on:
Fuel Solenoid Valve Coil or PROHEAT G-II PCM electrical.
Test Procedure – Fuel Solenoid Valve and G-II PCM test:
a) Disconnect all harnesses at the G-II PCM.
b) Disconnect the fuel supply line.
c) Loosen and back out the burner head mounting (2) bolts five to six turns
allowing enough room to rotate the burner head 15° counter-clockwise
and remove.
d) Disconnect the Fuel Solenoid Valve connector at the G-II PCM.
e) Inspect the G-II PCM connector for damage and corrosion. Inspect the
Fuel Solenoid valve harness and connector for damage and corrosion.
f) Measure the Fuel Solenoid Valve coil using a multimeter set to read Ohms.
If the coil measures between 35 and 45 Ohms, coil is OK, and if no damage
or corrosion is found in the G-II PCM connector or the Fuel Solenoid Valve
harness go to: G-II PCM replacement, page 4-38.
NOTICE
All plugs/harnesses must be rein-
stalled into the G-II Proheat Control
Module (G-II PCM) before heater
goes back into service.
NOT USED Diagnostic Code 9
This Diagnostic Code is NOT USED on the G-II PCM.