COVER AS-ACCESS 3571750 - Caterpillar

Table 1
Diagnostic Trouble Codes for "Injector Data Incorrect"
J1939 Code Description Notes
630-2 Calibration Memory : Erratic, Intermittent, or Incorrect The Electronic Control Module (ECM) detects one of the following conditions.
An injector code has not been programmed for one or more of the injectors.
OR
The injector code for one or more of the injectors is invalid.
The engine may have rough running at low idle.
651-20 Engine Injector Cylinder #01 : Data Drifted High The ECM will calibrate the injector energizing times while the engine is at low idle based on the readings from the oxygen sensor.
If the calculated energizing times exceed the limits set by the injector code, one of these diagnostic codes will become active for the applicable cylinder.
651-21 Engine Injector Cylinder #01 : Data Drifted Low
652-20 Engine Injector Cylinder #02 : Data Drifted High
652-21 Engine Injector Cylinder #02 : Data Drifted Low
653-20 Engine Injector Cylinder #03 : Data Drifted High
653-21 Engine Injector Cylinder #03 : Data Drifted Low
654-20 Engine Injector Cylinder #04 : Data Drifted High
654-21 Engine Injector Cylinder #04 : Data Drifted Low The following background information is related to this procedure:Injector codes are seven digit alphanumeric codes that are supplied with each injector. The code is printed on each injector. The code is used by the ECM to balance the performance of the injectors.Refer to Troubleshooting, "Injector Code - Calibrate" for further information.
Illustration 1 g02738616
Typical example of an electronic unit injector
(1) Location of the injector code
Table 2
Troubleshooting Test Steps Values Results
1. Check for Diagnostic Codes That Are Related to this Procedure
A. Connect the