NISSAN ALMERA NO INJECTOR PULSE ,NOT START

[abuuauto]

Hey, members .please l have Nissan almera 1.6 model 2002 ,car not start it have spark coil and if spray on intake start cut off after fuel finish but no injector pulse it have 12v supply on injector no signal from ecu ,we test ecu on other on car starting fine and test crank sensor ,cam sensor all ok .red light on dash it go off normal. l check on scanner no fault code , check all wire on ecu to compare with other ok .please any one have meet this problem on almera . thanks

[teeone]

almera has a brown 6 pin relay for injection control or maybe your ignition is faulty can cut power during cranking

[abuuauto]

yes brown relay with 6 pin it fine it have 3 power fine under cabi and ignition is fine it not cuting power .it injector not open only thanks

[clusters]

If the ECU tests good in another car and you have 12V to the injectors, it comes down to immo, wiring, or cam signal (usually triggers injector pulse)

A mistake commonly made in testing cam/crank sensors is that they may show a signal, but the amplitude of the signal may not be enough to satisfy the ECU.

Have you checked for power and ground to the sensors, ecu grounds?

[abuuauto]

yes l check power of the sensor cam and crank it have ground and 12v power ally wire from the sensor to ecu there ok . l

[clusters]

Double check ECU grounds.

I don't want to insult your diagnostic skills here, so if you know this already....

Three wire cam/crank sensors are usually hall effect sensors, so barring the engine over will result in either 0 Volts or supply Volts on the signal wire. Best checked at the ECU with meter to battery ground. Also, voltage tests at the sensors should be done circuit loaded (while cranking).

Here is a great video on hall effect sensor testing, it is for a Jeep, but other than the supply voltage differences, it applies to all three wire hall effect sensors.

https://www.youtube.com/watch?v=yp_kK6U8a64

Hope it might help you out.

[Aajii]

Is fuel pressure ok? fuel pump running on starting?

[byati]

MIL is flashing fast speed? There are problems in the vehicle immobilizer mate. ECU number you write?

[abuuauto]

hey ecu MEC 13-074 B1 4920 Y3 NISSAN. fuel pressure ok fuel pump running fine . l will check on cam and cranks how is the signal supply . thanks

[byati]

Ecu immo eprom?
Is it a diesel vehicle? Is gasoline?
Ecu picture of you puts

[Ryan2013]

Check your fuse box under yr steering wheel check the start signal fuse pull it out and check