On-Board Diagnostics With NGS

Special Tools:

Diagnosing an electronically controlled automatic transmission is simplified by using the following procedures. One of the most important things to remember is that there is a definite procedure to follow. DO NOT TAKE SHORT CUTS OR ASSUME THAT CRITICAL CHECKS OR ADJUSTMENTS HAVE ALREADY BEEN MADE. Follow the procedures as written to avoid missing critical components or steps. By following the diagnostic sequence, the technician will be able to diagnose and repair the concern the first time.

ON-BOARD DIAGNOSTICS WITH NGS

NOTE: For detailed instruction and other diagnostic methods using the New Generation Star (NGS); refer to the NGS tester manual and Powertrain Management. These quick tests should be used to diagnose the powertrain control and should be performed in order.
- Quick Test 1.0 - Visual Inspection
- Quick Test 2.0 - Set Up
- Quick Test 3.0 - Key On, Engine Off (KOEO)
- Quick Test 4.0 - Continuous Memory
- Quick Test 5.0 - Key On, Engine Running (KOER)
- Special Test Mode
- Output Test Mode
- Powertrain Control Module (PCM) Reset Mode
- Clearing Diagnostic Trouble Codes (DTCs)
- OBD II Drive Cycle
- Other NGS Features

Other diagnostic methods include the following:
- Parameter Identification (PID) Access Mode
- Freeze Frame Data Access Mode
- Oxygen Sensor Monitor Mode