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Powertrain DTC Summaries – OBD II FAULT DESCRIPTION MONITORING CONDITIONS CHECK ENGINE MIL (CK ENG) DEFAULT ACTION POSSIBLE CAUSES DTC Diagnostic Trouble Code. SYS The powertrain system with which the DTC is associated – EMS, TRANS, ABS/TC (DSC). DTC retrieval tools: OBD II – indicates that the DTC is an OBD II code and can be accessed via a generic scan tool or WDS. JAG – indicates that the DTC is not an OBD II code and is accessed only via WDS. Fault description. “DIAGNOSTIC MONITOR DRIVE CYCLE” for the particular DTC. Operate the vehicle as described to check for a reoccurrence of the DTC. Refer to pages 4 – 7. Use WDS Datalogger or Scan Tool to monitor specified engine parameter(s). 1 2 N OTHER Driver Warnings: N None R RED MIL / Message or Powertrain Warning Indicator A AMBER MIL / Message or Powertrain Warning Indicator C Charge indicator Control Module default action: Logged – DTC stored in ECM memory buffer; Flagged – DTC stored in ECM memory / CHECK ENGINE MIL activated. CM PIN ECM (SYS – EMS) / TCM (SYS – TRANS) Connector pin number(s) Possible causes are listed in the order of diagnostic checking. HIGH VOLTAGE – High voltage can be either sensor supply voltage (5 volts) or B+ voltage. 1 TRIP – indicates that the CHECK ENGINE MIL is activated by a fault occurring during ONE “TRIP”. 2 TRIPS – indicates that the CHECK ENGINE MIL is activated by a fault occurring during TWO CONSECUTIVE “TRIPS”. NO – indicates that the CHECK ENGINE MIL is not activated. OBD SYSTEM READINESS – ENGINE MANAGEMENT If DTC P1000 is flagged after DTCs have been cleared, all engine management OBD diagnostic monitor drive cycles HAVE NOT BEEN COMPLETED. If DTC P1111 is flagged after DTCs have been cleared, all engine management OBD diagnostic monitor drive cycles HAVE BEEN COMPLETED. OBD SYSTEM READINESS – TRANSMISSION Use WDS Datalogger “TOTAL NUMBER OF DTC SET” to determine if transmission OBD monitoring has been completed. Refer to page 7. OBD DIAGNOSTIC MONITORS The Engine Management and Transmission Control systems are continuously checked during vehicle operation by the Engine Control Module (ECM) and Transmission Control Module (TCM) on-board diagnostic (OBD) facilities. Powertrain OBD incorporates six diagnostic monitors. Each monitor has an associated group of DTCs. The diagnostic monitors will complete the diagnostic test(s) if a specified service “drive cycle” is carried out. The six diagnostic monitors are as follows: – – – – – – Heated Oxygen Sensors Monitor Adaptive Fuel Monitor Misfire Monitor Catalyst Efficiency Monitor Evaporative System Monitor Comprehensive Component Monitor (Engine Management / Transmission)