Figure 1. Diagnostic Form Follow this procedure to diagnose boost pressure. For a reproduction of the applicable portion of the diagnostic form, see Figure “Diagnostic Form” . Section 11.13.1 Purpose The purpose of this test is to determine if the engine can develop sufficient boost pressure to obtain specific power. Section 11.13.2 Test Procedure… Read More »
Figure 1. Diagnostic For The ICP Pressure test should be performed at full load in conjunction with Fuel Pressure Full Load and Boost Pressure Tests. Refer to “11.11 Fuel Pressure Full Load” . Refer to “11.13.2 Test Procedure” . For a reproduction of the applicable portion of the diagnostic form, see Figure above. “Diagnostic For”… Read More »
Figure 1. Diagnostic Form The Fuel Pressure Full Load Test, ICP Pressure Test and Boost Pressure Test may be performed simultaneously at full load conditions. Refer to “11.12 Icp Pressure” . Refer to “11.13.2 Test Procedure” . Follow this procedure for the Fuel Pressure Full Load test. For a reproduction of the applicable portion of… Read More »
Figure 1. Diagnostic Form The Engine Running Test must be performed first to access the INJECTOR TEST. For a reproduction of the applicable portion of the diagnostic form, see Figure “Diagnostic Form” . Section 11.10.1 Purpose The Engine Running Test will verify that all power cylinders are contributing equally. Section 11.10.2 Test Procedure After… Read More »
Figure 1. Diagnostic Form The EST (Electronic Service Tool) is used to signal the ECM to perform the Engine Running Test. The ECM will exercise the actuators and monitor sensor feedback signals. If a sensor or actuator problem exists, the ECM will transmit fault code(s) to the EST. For a reproduction of the applicable portion… Read More »
Figure 1. Diagnostic Form Follow this procedure to determine if an intake/air cleaner restriction is excessive. For a reproduction of the applicable portion of the diagnostic form, see Figure “Diagnostic Form” . Section 11.8.1 Purpose Often a low power and poor fuel economy complaint is simply due to a dirty air cleaner element. In this… Read More »
Figure 1. Diagnostic Form The following procedure will lead you through the Self Test Input (STI) to read faults. For a reproduction of the applicable portion of the diagnostic form, see Figure “Diagnostic Form” . Section 11.7.1 Purpose The purpose of the STI is to read faults detected by the ECM if the Electronic Service… Read More »
Figure 1. Diagnostic Form The following procedure will lead you through the Injector Buzz Test. For a reproduction of the applicable portion of the diagnostic form, see Figure “Diagnostic Form” . Section 11.6.1 Purpose This test will determine if the injectors are functioning correctly electronically, by energizing each injector in a programmed sequence. The ECM… Read More »
Figure 1. Diagnostic Form Follow these procedures to access the EST — Engine Off Tests. Access Diagnostic Codes menu in the EST and clear all fault codes before performing the Engine Off Tests. For a reproduction of the applicable portion of the diagnostic form, see Figure “Diagnostic Form” . Section 11.5.1 Purpose The EST… Read More »
Figure 1. Diagnostic Form To check fault codes, follow this procedure. For a reproduction of the applicable portion of the diagnostic form, see Figure “Diagnostic Form” . Section 11.4.1 Purpose The purpose of the EST — Fault Codes check is to determine if the ECM has detected any fault conditions that would cause a hard… Read More »