© 2005-2016 Nira Control AB 97
5.3 Quick Troubleshooting Guide
5.3.1 The Engine Won’t Start
Some of the more common causes are:
Missing CKP sensor signal. Verify that the tachometer shows
approximately 200rpm when you crank the engine. If not, then the
CKP sensor installation is the cause. Analysis of the CKP sensor signal
is done using an oscilloscope
Lack of fuel. Verify that the fuel pump is running. The pump should
run for about 2 seconds every time the ignition key is turned to the
Key On Engine Off position (KOEO) position if the fuel pump and fuel
pump relay are connected correctly. The pump also runs whenever
the engine cranks and NIRA i7x sees a correct signal from the CKP
sensor
No current to the fuel injectors. Check that the injectors are getting
pulsed properly. If not, the electrical connections to the injectors are
wrong or the injector setup in Engine Setup is wrong. Normal injector
current is 0.8A for a 14 Ohm injector.
DGE Camshaft alarm. If this alarm is set the CMP sensor signal is
wrong. Either the electrical connection is wrong or the setup in
Engine Setup is wrong. (NIRA i7x may still be able to sync things
correctly and start the engine approximately half the time.)
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