Quick Test Description

QUICK TEST DESCRIPTION

Quick Test is divided into five specialized tests:
(1) Retrieve/Clear Continuous 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 Monitoring Self Test

All are described below.

Quick Test checks the integrity and function of the Powertrain Control system and outputs the test results upon demand. Quick Test also provides a quick end check of the powertrain control system and is usually performed at the start of each diagnostic procedure. It is also performed at the end of most pinpoint tests for verification of repair and to make sure no other faults were incurred while servicing a previous fault.

Retrieve/Clear Continuous DTCs
Retrieve/CMDTCs is a functional test of the PCM. DTCs can be retrieved or cleared with the key on and the engine off or running. Unlike 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 will be stored in memory to be retrieved at a later date, making it possible to diagnose intermittent faults. For California vehicles, P1000 DTC may be the only DTC displayed, indicating an incomplete OBD drive cycle (more drive time needed). The fuel injection control module (FICM) monitors the injector circuits for a fault continuously. The FICM sends failure information via CAN communications and a PCM DTC is set. CMDTCs indicate the injector electrical system failure.

Key On Engine Off (KOEO) On-Demand Self Test
Key On Engine Off (KOEO) On-Demand Self Test is a functional test of the PCM performed on demand with the key on and the engine off. This test will check that all inputs and outputs (circuits, sensors, regulators, relays and solenoids) connected to the PCM are electrically operating without fault.

Key On Engine Off (KOEO) Injector Electrical Self Test







Key On Engine OFF (KOEO) injector electrical self test is a functional test of the FICM performed on demand with the key on and the engine off. This test determines if the injector circuits and solenoids are electrically operating without fault. All injectors will 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 three 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
The Output State Control (OSC) aids in servicing 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
Key On Engine Running (KOER) On-Demand Self Test is a functional test of the PCM performed on demand with the engine running. Temperature is not a factor, but 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, engine rpm can 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 Diagnostic Trouble Code (DTC) will be the output on the data link at the end of the test when requested by a scan tool. Only a hard fault code (DTC) will be displayed.

Key On Engine Running (KOER) Glow Plug Monitoring Self Test
Key On Engine Running (KOER) Glow Plug Monitoring Self Test is a functional test of the glow plug system performed on demand with the engine running and the A/C off. Battery voltage must be maintained at 10-14 volts during this test. If necessary, press the accelerator pedal to increase voltage to the specified level. The PCM will activate the Glow Plug Control Module (GPCM) and monitor the glow plug circuits. A fault must be present at the time of testing for the test to detect a fault. DTCs will be sent to the PCM on the diagnostic line and then output to the scan tool.

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 for California vehicles. Non-MIL DTCs indicate a less serious or non-emission related concern with the system.