PROHEAT M-SERIES SERVICE MANUAL
3-32
TEMPERATURE SENSOR T2 Diagnostic Code
Go to Temperature Sensor T1 Diagnostic Code, page 3-29.
IGNITION MODULE Diagnostic Code
Indicates an over-load fault is detected.
Troubleshoot the Ignition Module diagnostic code based on:
Ignition Module and PCM – electrical.
Test procedure – Ignition Module and PCM:
a) Disconnect all harnesses at the 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 Ignition Module connector at the PCM.
e) Reconnect the power and switch harnesses at the PCM.
f) Switch the PROHEAT on and operate for at least one complete cycle.
Observe the operation.
If an Ignition Module diagnostic code is NOT indicated and the PROHEAT
attempts to operate, the Ignition Module is faulty. Go to Ignition Module
replacement, page 3-19.
If the Ignition diagnostic code is indicated, the PCM is faulty. Go to PCM
replacement, page 3-39.
3.1.10
(10 Flashes)
3.1.9
(7 or 9 Flashes)
Figure 3-38: Burner Head Removal
MOUNTING EARS (2)
MOUNTING BOLTS (2)
TORQUE = 100 in-lbs
COOLANT PUMP
SWITCH INPUT
TEMP SENSOR 1
POWER
FUEL INLET
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