FixVault

Retrieving Diagnostic Trouble Codes

Connect New Generation Star (NGS) tester to Data Link Connector (DLC) and retrieve any charging system Diagnostic Trouble Codes (DTCs). See CHARGING SYSTEM DTC INDEX  table. If no DTCs are present, repair by symptom. See SYMPTOM INDEX  table under SYSTEM TESTS.

CHARGING SYSTEM DTC INDEX

DTCs Description Perform Test
P1244 Generator Load Input Low (1)
P1245 Generator Load Input High (1)
P1246 Generator Load Input Failure (1)
(1) For DTC testing, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.