Quick Test Description
QUICK TEST DESCRIPTION
The Quick Test is carried out by retrieving the key ON engine OFF (KOEO), key ON engine running (KOER), and continuous memory diagnostic trouble codes (DTCs).
Quick Test is divided into 5 specialized tests:
1. Retrieve/Clear Continuous DTCs
2. KOEO On-Demand Self-Test
3. KOEO Injector Electrical Self-Test
4. KOER On-Demand Self-Test
5. KOER Glow Plug Monitoring Self-Test
All are described.
Quick Test checks the integrity and function of the powertrain control module (PCM) and outputs the test results upon demand. The Quick Test also provides a quick end check of the powertrain control system and is usually carried out at the start of each diagnostic procedure. It is also carried out at the end of the pinpoint tests for verification of repair and to make sure no other concerns were incurred while repairing a previous concern.
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 concern is detected, a DTC is stored in memory to be retrieved at a later date, making it possible to diagnose intermittent concerns. DTC P1000 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 concern. The FICM sends failure information through the controller area network (CAN) and a PCM DTC is set.
Quick Test
For all concerns, refer to the Symptom Charts. The Quick Test is carried out by retrieving KOEO, KOER, and continuous memory DTCs. If a DTC is retrieved, you must then go to the appropriate pinpoint test. If unable to complete the self-test, GO to Pinpoint Test AE. Symptom Related Diagnostic Procedures Tests AE: Unable To Activate Self-Test/Network Communication Error
Key On Engine Off (KOEO) On-Demand Self-Test
NOTE: It is necessary to wait 4 seconds after key on to initiate the KOEO self-test. Failure to do so results in a test fail PCM message to be displayed.
The engine may run rough during this 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 (circuits, sensors, regulators, relays, and solenoids) connected to the PCM are electrically operating without a concern.
Key On Engine Off (KOEO) Injector Electrical Self-Test
NOTE: If no DTCs are present refer to Powertrain DTC Charts/Diagnostic Subroutines, Performance Diagnostic Procedures and carry out the Power Balance test 6b. If the KOEO injector electrical self-test aborts while trying to activate, refer to Powertrain DTC Charts/Diagnostic Subroutines, Injector Interrupt for Enhanced Diagnostics. Component Tests and General Diagnostics 6B. Power Balance Test Injector Interrupt For Enhanced Diagnostics
The KOEO injector electrical self-test is an on-demand functional test of the FICM carried out with the key ON and the engine OFF. This test determines if the injector circuits and coils are correctly operating. If a concern is detected by the FICM, a CAN message is sent to the PCM. Corresponding DTCs are displayed at the end of the self-test.
- Turn off all accessories. If the vehicle is equipped with a power take-off (PTO) system or auxiliary idle control, it must be turned off to carry out self-tests.
- Carry out the necessary vehicle preparation and a visual inspection. Refer to Quick Test Operation.
- Refer to the scan tool operating manual for instructions.
- Key ON, engine OFF.
- Carry out the KOEO Injector Electrical Self Test.
- Key in OFF position.
- Record the DTCs and carry out the appropriate pinpoint test.
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 concern must be present at the time of testing for the KOER on demand self-test to detect a concern. If a concern is detected, a DTC is output on the data link at the end of the test when requested by a scan tool. Only a hard concern code DTC is displayed.
Key On Engine Running (KOER) Glow Plug Monitoring Self-Test
NOTE: When running this self-test, the battery voltage must not decrease to less than 10 volts or exceed 14 volts. Make sure that the batteries are OK and the charging system is working correctly. If necessary, apply the accelerator pedal to maintain system voltage.
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 and monitors the glow plug circuits. A concern must be present at the time of testing for the test to detect a concern. DTCs are sent to the PCM on the diagnostic line and then output to the scan 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.