DDEC and Pro-Link Operations
Diagnostic trouble codes (DTC) are generated in the ECU when a condition exists that prevents the engine from operating at peak efficiency. They aid in helping the technician locate a problem. Three primary codes exist: Component, Logic, and Engine Protection.
A component DTC is activated when a specific component failure exists. This is most commonly seen as a high volt or low volt code for a specific device. The failure can generally be found within the component or associated wiring.
A logic DTC is activated when specific conditions occur within a given amount of time that the calibration determines is not “normal.”
An engine protection DTC is activated when an engine operating condition exists that can cause immediate damage to the engine and the engine should be shut down until the condition is corrected to prevent additional damage.
The following procedures are performed using the Pro-Link® Diagnostic Data Reader (DDR).
Retrieving and Clearing Codes
Start with the Menu Selection screen, on the DDR:
- To call up active codes, select ENGINE and ENTER three times.
- To call up inactive codes:
- Select ENGINE and ENTER twice.
- Select INACTIVE CODES and ENTER.
- To clear codes:
- Select ENGINE and push ENTER twice.
- Go down and select CLEAR CODES and ENTER.
- Left to YES, and ENTER.
- Wait and then push FUNC three times.
- Go to lines 1 and 2 of the Engine Data List, Active and Inactive Codes, and verify that both lines display NO.
Unit Injector Calibration Update
The unit injector calibration update function is a setting in the ECU that is used to improve product performance, and cylinder balancing. This is set to improve performance or whenever an injector is changed. The calibration code is located on a metal plate on top of the solenoid on the N2 unit injector and on top of the electrical connector of the N3.
To update the injector calibration, start with the Menu Selection screen:
- Select ENGINE and ENTER.
- Go down to FUEL INJECTOR INFO and ENTER.
- Go down to CAL UPDATE and ENTER.
- Select VIEW and ENTER or select UPDATE and ENTER.
- Enter password: 0000 or xxxx and ENTER twice.
- Enter new CAL # and ENTER. Use UP/DN arrow keys to select line.
- When finished, select FUNC, select YES, ENTER and wait.
- ENTER to continue.
A snapshot allows a customer to record an event in the engine. The ECU monitors many sensors that can be displayed and graphed through Pro-Link operations. The snapshot allows a technician to store and analyze the performance of the engine. The snapshot can also be forwarded electronically to aid in resolving the concern.
To generate a snapshot, start with the Menu Selection screen:
- Select PRO-LINK and ENTER.
- Go up to SNAPSHOT and ENTER.
- Go down to DATA UPDATE RATE and ENTER.
- Type in NEW RATE and ENTER (0.0 to 9.9 seconds), (90 frames will be recorded.)
- Go up to TRIGGER SOURCE and ENTER:
- Any Numeric Key
- Any code
- Specific PID
- Specific SID
- Select TRIGGER SOURCE and ENTER.
- Adjust TRIGGER POINT: NO, or select YES and ENTER; change trigger point with RT/LT arrow keys and ENTER.
- WAITING FOR TRIGGER. When ready to take SNAPSHOT, apply the trigger. ANY NUMERIC KEY overrides all other triggers.
- PROCESSING TRIGGER; Filling remaining frames (90 frames Max). When all frames are filled, the first three lines of the TRIGGER FRAME, “T” will display.
- To do SNAPSHOT after setup is done, do items 1, 2, and 8 only, or go to QUICK TRIGGER and ENTER.
- SNAPSHOT DATA stays stored in Pro-Link memory as long as the DDR remains powered up.
|Unit Fuel Injectors and Unit Pumps Technician's Guide - 7SE500|
|Generated on 10-13-2008|