Clearing Trouble Codes

Diagnostics
Diagnosing electronically controlled automatic transaxles is simplified by using the following procedures. One of the most important things to remember is that there is a definite procedure. 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 repair technician will be able to diagnose and repair the concern the first time.


On-Board Diagnostics With NGS

NOTE: If using a generic scan tool, refer to the Powertrain Control/Emissions Diagnosis Manual for instructions on performing OBD procedures.

The Quick Tests are in the Powertrain Control/Emissions Diagnosis Manual. These tests can be used to diagnose the Powertrain control module, sensors, and actuators of the CD4E transaxle.
The following is a guide for using the On-Board Diagnostic (OBD) Quick Tests and the New Generation STAR (NGS) Tester.
- Quick Test 1.0 - Visual Inspection
- Quick Test 2.0 - Set Up
- Quick Test 3.0 - Key On, Engine Off
- Quick Test 4.0 - Continuous Memory
- Quick Test 5.0 - Key On. Engine Running
- Special Test Mode
- Wiggle Test Mode - Output Test Mode
- PCM Reset Mode
- Clearing DTCs
- OBD II Drive Cycle
- Other NGS Features

Other NGS Features
Other diagnostic methods include the following:
- Parameter Identification (PID) access mode. used to monitor sensors and actuators.
- Freeze frame data access mode, used to view emission related data values from specific PIDs.
- Oxygen sensor monitor mode, used to monitor the oxygen sensor.