Quick Test Description

QUICK TEST DESCRIPTION

Quick Test is divided into 5 specialized tests:
(1) Retrieve/Clear Continuous diagnostic trouble codes (DTCs)
(2) Key On Engine Off (KOEO) On-Demand Self-Test
(3) Key On Engine Off (KOEO) Injector Electrical Self-Test (Click Test)
(4) Key On Engine Running (KOER) On-Demand Self-Test
(5) Key On Engine Running (KOER) Glow Plug Motioning Self-Test

All are described below.

Quick Test checks the integrity and function of the powertrain control module (PCM) and outputs the test results upon demand. Quick Test also provides a quick end check of powertrain control system and is usually carried out at the start of each diagnostic procedure. It is also carried out at the end of pinpoint tests for verification of repair and to make sure no other faults were incurred while repairing a previous fault.

Retrieve/Clear Continuous Diagnostic Trouble Codes (DTCS)
Retrieve/clear continuous DTCs is a functional test of the PCM. DTCs can be retrieved or cleared with the key on and the engine off or running. Unlike the KOEO and KOER self-tests, which can only be activated on demand, the continuous monitor is always active in monitoring the system. When a fault is detected, a DTC is stored in memory to be retrieved at later date, making it possible to diagnose intermittent faults. A P1000 DTC may be the only DTC displayed, indicating an incomplete on-board diagnostic (OBD) drive cycle (more drive time needed). The fuel injection control module (FICM) continuously monitors the injector circuits for a fault. The FICM sends failure information through the controller area network (CAN) and a PCM DTC is set.

Key On Engine Off (KOEO) On-Demand Self-Test
The KOEO on-demand self-test is an on-demand functional test of the PCM carried out with the key on and the engine off. This test checks that all inputs and outputs (circuit, sensor, regulators, relays, and solenoids) connected to the PCM are electrically operating without fault.

Key On Engine Off (KOEO) Injector Electrical Self-Test (Click Test)






The KOEO injector electrical self-test (click test) is an on-demand functional test of the fuel injection control module (FICM) carried out with the key on and the engine off. This test determines if the injector circuits and solenoids are electrically operating without fault. All injectors click (audible feedback of the injector solenoids energizing the injector valves) together. Then each injector, 1 through 8, is cycled approximately one second in sequence. This process is repeated 3 times during the entire test. If a fault is detected by the FICM, a CAN message is sent to the PCM. Corresponding fault DTCs are displayed at the end of the self-test.

Output State Control (OSC)
The OSC aids in diagnosing output actuators associated with the PCM. It allows the technician to energize and de-energize most of the system output actuators on command.

Key On Engine Running (KOER) On-Demand Self-Test
The KOER on-demand self-test is an on-demand functional test of the PCM carried out with the engine running. Temperature is not a factor, but the air conditioning (A/C) must be turned off. A check is made on the injection control pressure (ICP), variable geometry turbocharger (VGT), and exhaust gas recirculation (EGR) systems. During this test, the engine RPM may vary. A fault must be present at the time of testing for the KOER on demand self-test to detect a fault. If a fault is detected, a DTC is output on the data link at the end of the test when requested by a diagnostic tool. Only a hard fault code DTC is displayed.

Key On Engine Running (KOER) Glow Plug Monitoring Self-Test
The KOER glow plug monitoring self-test is an on-demand functional test of the glow plug system carried out with the engine running and the A/C off. Battery voltage must be maintained at 10-14 volts during this test. If necessary, apply the accelerator pedal to increase voltage to the specified level. The PCM activates the glow plug control module (GPCM) and monitors the glow plug circuits. A fault must be present at the time of testing for the test to detect a fault. DTCs are sent to the PCM on the diagnostic line and then output to the diagnostic tool.

Malfunction Indicator Lamp (MIL) DTCs
MIL DTCs are generated to alert the driver that there is a concern with the system or the vehicle is in failure management effects mode (FMEM). MIL DTCs are also used to indicate an emission concern. Non-MIL DTCs indicate a less serious or non-emission related concern with the system.