Diagnostic Mode 02 - Read Operating Conditions

Diagnostic Modes 01 - 09

Diagnostic Mode 02 - Read Operating Conditions

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.

• Depending on scan tool and protocol used, the information in diagnostic mode 01 may be referred to by different names such as Test-ID (TID), Hex-ID, Component-ID (CID), or On-Board Diagnostic Monitor Identifier (OBDMID).

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.

Work procedure

- Connect diagnostic tester.

- Depending on desired operating condition: Switch on ignition or start engine and let run at idle.

- Under address word 33, select "Diagnostic mode 2: Read operating conditions".

- Select desired operating condition "PID XX".

• The following list only serves as an overview.

• The operating conditions are sorted by the PID (parameter-identifications).

• Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel.

• Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel.





- End diagnosis and switch ignition off.

If DTCs are displayed in "PID 02":

- Repair stored malfunctions according to DTC table:

• SAE P0xxx-DTCs => [ SAE P0xxx-DTCs ] Testing and Inspection,

• SAE P1xxx-DTCs => [ SAE P1xxx-DTCs ] Testing and Inspection,

• SAE P2xxx-DTCs => [ SAE P2xxx-DTCs ] Testing and Inspection,

• SAE P3xxx-DTCs => [ SAE P3xxx-DTCs ] Testing and Inspection,

• SAE U0xxx-DTCs => [ SAE U0xxx-DTCs ] Testing and Inspection.

• The DTC table is sorted by SAE code.

• Erase DTC memory after repairing malfunction => [ Diagnostic Mode 04 - Erase DTC Memory ] , Diagnostic mode 4: Reset/erase diagnostic data.