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M103 300GE KE jetronic electrical test with multimeter

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Fernando BR
Posts: 1913

M103 300GE KE jetronic electrical test with multimeter

Post#1 » Sun May 27, 2018 7:57 am

If you do not have a 0.4 bar fuel pressure difference between fuel distributor chambers or you dont read near 0 mA (-2 to 2 mA) on EHA at iddle with warm engine doing the procedure bellow:

viewtopic.php?f=48&t=6380

This sequence of tests may help.

Start to check lambda with a multimeter
Read contacts 2 (ground) and 3 (kat) on diagnoses connector at engine bay. Correct read is near 7.5 V (alternate ) for trucks with KAT RUF chip and 6.5V for trucks with ECE RUF . Always with warm engine at iddle. Test also O2 sensor ,the test procedure and reference data is on one of the files bellow .

If lambda is ok and Eletrohidraulic actuator shows strange values , go ahead checking the other sensors.Sometimes only cleaning them can solve the problem.

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Fernando BR
Posts: 1913

Re: M103 300GE KE jetronic electrical test

Post#2 » Sun May 27, 2018 8:02 am

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Fernando BR
Posts: 1913

Re: M103 300GE KE jetronic electrical test

Post#3 » Sun May 27, 2018 8:05 am

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Fernando BR
Posts: 1913

Re: M103 300GE KE jetronic electrical test

Post#4 » Sun May 27, 2018 8:07 am

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Fernando BR
Posts: 1913

Re: M103 300GE KE jetronic electrical test

Post#5 » Sun May 27, 2018 3:47 pm

This file is out of order. May be there are others.
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