Connect scantool to Data Link Cable (DLC).
Monitor " Injector Booster Operating Voltage " parameter on the scantool.
Fig 1) Normal value with injector booster operating voltage sensor at idle.
4. Is Current data displayed correctly ?
YES
▶ Fault is intermittent caused by poor contact in the sensor’s and/or ECM’s connector or was repaired and ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.
NO
▶ Substitute with a known-good ECM and check for proper operation.
If the problem is corrected, replace ECM and then go to "Verification of Vehicle Repair" procedure.