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.

Depending on scan tool and protocol used, the information displayed in diagnostic mode 02 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.

Procedure 

-- Connect the scan tool.

-- Start the engine and run at idle.

-- 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.

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

PID	Component or System
02:	DTC which triggered the current reception of all control module information
03:	Condition of fuel system
04:	Calculated load condition value
05:	Coolant temperature
06:	Short term gasoline-air ratio bank 1
07:	Gasoline-air ratio bank 1
12:	Engine rotations per minute (RPM)
13:	Vehicle speed
14:	Ignition timing adjustment at 1. cyl. in direction
15:	Intake air temperature (IAT)
16:	Air stream amount at Mass Air Flow (MAF) sensor
17:	Throttle valve position (absolute)
31:	Time after engine on
35:	Fuel Rail Pressure
46:	Commanded Evaporative Purge
51:	Barometric Pressure
66:	Control module voltage
67:	Absolute Load Value
68:	Commanded Equivalence Ratio
69:	Relative Throttle Position
70:	Ambient air temperature
71:	Absolute Throttle Position B
73:	Accelerator Pedal Position D
74:	Accelerator Pedal Position E
76:	Commanded Throttle Actuator Control

-- Switch the ignition off.