Ignition switch "OFF"
Connect VMI to GDS and set up the Oscilloscope.(2 Channel):
Channel A (+) : Pin No. 2 (Injector Control Low) terminal (Injector
Is the measured value within specification?
 | ▶ 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. |
 | ▶ Go to "Component Resistance Measurement" procedure. |
Ignition switch "OFF"
Disconnect battery (-) cable.
Refer to "Shop Manual" and disconnect injector connector.
Measure the resistance between Pin No. 1 (Injector Control High) terminal and Pin No. 2 (Injector Control Low) terminal of injector harness connector.
Specification : 0.35 - 0.43 Ω (20℃/68℉)
Is the measured value within specification?
| ▶ 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. |
| ▶ Carefully re-do this troubleshooting guide steps. ▶ If no problems were found with the circuits or connectors, replace the Injector #1 and go to "Verification of Vehicle Repair" procedure. |
When installing component, tighten it within specification.
If component is dropped, check for proper operation. The internal damage may be present.
Common Rail Fuel Injection System operates with extremely high pressure (approximately 1,600bar), so never perform any work on injection system with engine running or within 30 seconds after the engine stops.
Keep the parts and the working area clean.
Inspect for any foreign substance while installing fuel delivery system.
Remove the protect-cap attached just before installing injector, tube or hose.
When installing Injector;
- Clean the contact area of the injector and replace the gasket with a new one.
- Apply diesel on injector O-ring.
- When installing the injector, to protect damage caused by shock and other condition, vertically insert the injector into the cylinder head.
When installing High Pressure Fuel Pipe;
Do not re-use high pressure fuel pipe.
Properly install the flange nut.
After replacing the injector, the injector specific data (7 digit) of each cylinder MUST be input into ECM with the GDS.
Ignition switch "OFF"
Connect GDS to Data Link Connector (DLC).
Ignition switch "ON" & Engine "OFF"
Perform "Injector Specific Data" in "Vehicle S/W Management" with GDS.
Fig.1) Vehicle S/W Management list of U2 engine
Fig.2) Condition of Injector Specific Data
Fig.3) Injector Specific Data
Fig.4) Complete
