Purpose To determine if compression is too low in any cylinder NOTE: During this test the IDM shuts off the injectors so no fueling occurs.…

Purpose To determine the cause of rough engine idle The Injector Disable Tests can only be done with the EST; MasterDiagnostics® software is required. The…

Purpose To determine if the ICP system is providing enough hydraulic pressure to operate the injectors Tools • EST with MasterDiagnostics® software • EZ-Tech® interface…

Purpose To verify that the engine sensors and IPR are operating correctly within specified operating ranges The ECM will actuate the IPR and monitor ICP…

Purpose To check for restrictions in the exhaust system likely to cause engine performance problems NOTE: High intake or exhaust restriction can cause a large…

Purpose To check for restriction in the air intake system likely to cause engine performance problems. NOTE: High intake or exhaust restriction can cause a…

Purpose To check for correct fuel pressure and aerated fuel • Ask the operator if the amber WATER IN FUEL lamp was on during vehicle…

Purpose To check fuel level and quality for efficient engine operation • Ask the operator if the amber WATER IN FUEL lamp was on during…

Purpose To determine if crankcase oil level and oil quality are correct to ensure operation of the Injection Control Pressure (ICP) system Tools • None…

Purpose To determine if fuel injectors are working (electronically) by energizing injectors in a programmed sequence. The ECM monitors the IDM results from this test…