Test Description
WARNING: This page is about a different variant/trim than selected.
The numbers below refer to the step numbers on the diagnostic table.
- 2. Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data circuit. The specified procedure determines the particular condition.
- 5. This step stores the PCM DTC information into the scan tools memory. Review the captured information at the end of the diagnostic procedure. This will aid in catching the next DTC, in the event there are multiple DTCs stored. Review the Freeze Frame/Failure Records in order to determine how frequently and how recently the DTC set. This information and other operating conditions when the DTC set may help diagnose an intermittent condition. Capturing the stored information preserves data that the PCM loses when the following occurs:
- If you are instructed to clear DTCs.
- The PCM connectors are disconnected.
- The PCM is replaced during a diagnostic procedure.
- 6. The presence of DTCs which begin with "U" indicate some other module is not communicating. The specified procedure will compile all the available information before tests are performed.
- 8. If there are other modules with DTCs set, refer to the DTC list. The DTC list directs you to the appropriate diagnostic procedure. If multiple powertrain DTCs are stored, diagnose in the following order of priority:
- Component level DTCs, such as sensors, solenoids, or relays--Multiple DTCs within this category should be diagnosed in numerical order starting with the lowest numbered DTC, unless otherwise directed.
- System level DTCs, such as misfire, fuel trim, or catalyst.
- 9. This step is for areas that have an Inspection/Maintenance or emission testing program. The testing facility found one or more I/M system statuses not set.