Long Term Fuel Trim and Short Trim Fuel Trim

Long Term Fuel Trim and Short Trim Fuel Trim

Long Term Fuel Trim and Short Trim Fuel Trim filed under: Analysis, Automotive, Diagnostics, Fuel Injection, On-Board Diagnostics, Testing, Toolsposted: 2018-11-23 What is Fuel Trim? Fuel trims are what engine control system use...

FINDING A SHORT CIRCUIT

Remove the blown fuse and disconnect all loads of the fuse.Connect a test light in place of the fuse.Establish conditions in which the test light comes on. Example:[A] – Ignition SW on[B] – Ignition SW and SW 1 on[C] – Ignition SW, SW 1 and Relay on...

CONTINUITY AND RESISTANCE CHECK

Disconnect the battery terminal or wire so there is no voltage between the check points.Contact the two leads of an ohmmeter to each of the check points. If the circuit has diodes, reverse the two leads and check again.When contacting the negative lead to the diode...
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