Perkins 1106C - Starting Aid (Glow Plug) Relay Circuit - Test

174 KENR6933
Troubleshooting Section
i02661788
Starting Ai d (Glow Plug ) Rela y
Circuit - Test
System Operat
ion Description:
Use this procedure if another test procedure has
directed you h
ere.
Use this procedure for the following diagnostic codes:
•
2246-06 Glow Plug Start Aid Relay Current above
normal
The following background information i s related
to this procedure:
The starting aid is used to improve the engine starting
when the engine is cold. With the keyswitch in the
ON position,
the engine Electronic Control Module
(ECM) will monitor the coolant temperature and the
intake manifold air temperature in order to decide
if the glow p
lugs are required to be switched ON. If
the glow plugs are required, then the ECM activates
thestartingaidrelayforacontrolledperiodoftime.
While the gl
ow plug start aid relay is energized the
glow plug start aid relay will switch power to the glow
plugs. If a “Wait To Start” lamp is installed, the lamp
will be ill
uminated in order to indicate the “Wait To
Start” period.
“Wait to St
art/Start Aid Active Lamp”
This feature may be included as an option.
On a cold start, when the ECM decides that it is
necessary for the glow plugs to be activated prior
to startin
g, a lamp output will indicate that the
operator needs to “Wait to Start”. It is possible that
starting aids may be used during the cranking of the
engine. S
tarting aids may be used if the engine has
previously been started. The “Wait to Start” lamp will
not be active in these conditions.
Electronic Service Tool
The elect
ronic service tool includes the test “Glow
Plug Start Aid Override Test”. The “Glow Plug Start
Aid Override Test” will assist the analysis of the cold
startin
gaid.
Overview of the Glow Plug Start Aid Override Test
This glow plug start aid override test switches on the
cold starting aid when the engine is not running. The
glow plu
g start aid override test aids the analysis of
the circuit for the glow plug start aid relay.