8 - KOEO Injector Electrical Self Test

8. KOEO Injector Electrical Self Test

NOTE: If unable to perform KOEO Injector Electrical Self Test, disconnect IDM connector and check injector high and low side for shorts or opens.












Purpose:
To determine if the injector solenoids and valves are operating by buzzing all injectors together and then each injector in numerical sequence (1 through 8).

Recommended Procedure:

NOTE:
- If no DTCs are present and the KOEO Injector Electrical Self Test aborts while trying to perform, go to Pinpoint Test NA, Step NA29. Tests NA: Injector Driver Circuit Operation
- This test determines if the injector circuits and solenoids are electrically operating without fault. All injectors will first buzz together for approximately 2 seconds, then each injector will buzz for approximately 1 second in numerical order (1 through 8). The IDM stores all historical IDM fault codes; to ensure that the DTC is a hard fault, you must first clear continuous DTCs (be sure to record all IDM fault codes before clearing). After clearing, rerun self test: a fault must be present at the time of testing for the KOEO Injector Electrical Self Test to detect the fault. If a fault is detected, a DTC will be 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.

Connect the NGS Tester to the DLC under the dash. Turn off accessories. If vehicle is equipped with an auxiliary powertrain control (rpm control), it must be turned off to perform self tests.
- Perform the necessary vehicle preparation and visual inspection. Refer to Quick Test Operation. Quick Test Operation
- SELECT CORRECT VEHICLE, YEAR and MODEL.
- Select DIAGNOSTIC DATA LINK.
- Select PCM - POWERTRAIN CONTROL MODULE.
- Select DIAGNOSTIC TEST MODE.
- Select KOEO INJECTOR ELECTRICAL SELF TEST.
- Follow operating instructions from the menu.
- Record DTCs and follow appropriate pinpoint test. Pinpoint Tests
- After test, cycle key to off before running other tests or driving vehicle.

Possible Causes:
- Open or shorted injector circuits
- Bad injector connector
- Open or shorted CID or FDCS circuits
- Open injector solenoid
- IDM powering or ground circuits
- Defective IDM

Tools Required:
New Generation Star (NGS) Tester 007-00500 or equivalent