Diagnostic Mode 02 - Read Operating Conditions

Diagnostic Modes

The information provided in Modes 01 through 09 displays the various levels of emission related data that may be monitored, as well as the ability to retrieve and read stored DTC trouble codes , erase stored DTC trouble codes, generate readiness codes, and select the various PIDs and Test-IDs used within the modes to monitor the engine, and emission related component parameters.

The following table provides a link to all diagnostic modes that monitor all components and systems which influence the emission quality.

• Depending on scan tool and protocol used, the information displayed may be referred to by different names such as Test-ID (TID), Hex-ID, Component-ID (CID), On-Board Diagnostic Monitor Identifier (OBDMID), or contain no name at all and be referenced by only a number.

Diagnostic Mode 02 - Read Operating Conditions

When an emissions-related fault (pending DTC, visible in mode 07) is first detected, operating conditions are stored. Mode 02 makes it possible to access this freeze frame data as soon as this fault is shown in mode 03. Each control module only shows freeze frame data for one fault via mode 02. Therefore, there are two priority levels. If there is a malfunction with higher priority, the freeze frame data is overwritten.

- Fault with higher priority: Misfire malfunction or fuel trim malfunction.

- Fault with normal priority: All other emissions-related faults.

Procedure

- Connect the diagnostic tester.

- Start the engine and run at idle.

• If the engine does not start, crank the engine using starter for at least 5 seconds, do not switch the ignition off afterward under any circumstances.

- Select "Diagnostic Mode 2: Obtain operating conditions.".

- From the following table, select the desired the "PID", e.g. "PID 05-Coolant temperature" that is to be monitored.

• More than one "PID" may be selected and monitored.

The current values of the component or system that is being monitored will be displayed on the diagnostic tester screen.





- Switch the ignition off.

- End of diagnosis.