5-11
Troubleshooting LEDs
The NIM must be awake to communicate. To wake
up the NIM, press the start switch on the genset.
The NIM will always be awake when the genset is
running. It will turn itself off in 5 to 10 minutes after
the genset stops, if there is no communication activ-
ity.
LED indicator light DS2 blinks very fast when com-
municating with the genset. If it does not, check that
the Y-harness is connected to 8-pin connector J10
on the NIM and genset remote connector J4 inside
the control junction box. See Page A-3.
LED indicator light DS4 blinks approximately once a
second when communicating with the network. If it
does not, check that the network harness is con-
nected to 12-pin connector J11 on the NIM. If it still
does not communicate, troubleshoot the network
harness.
LED indicator lights DS1 and DS3 are not used at
this time.
Troubleshooting Network
1. Make sure the NIM has been configured prop-
erly with its jumpers.
2. Disconnect the network harness at 12-pin con-
nector J11 on the NIM and measure resistance
across pins 4 and 5 in the mating network har-
ness connector. The resistance should be 60
ohms, indicating that there is a terminating re-
sistor at each end of the network and that the
wiring is intact.
3. Make sure that CAN HI (or CAN +) matches
CAN HI on the display and rest of the network.
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