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 in diagnostic mode 02 may be referred to by different names such as Test-ID, Hex-ID, Component-ID, or On-Board Diagnostic Monitor Identifier (OBDMID).
Procedure
-- Connect the scan tool.
-- 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.
-- Select "Diagnostic Mode 2: Obtain operating conditions.".
-- From the following table, select the desired "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 |
|---|---|
| $00: | Supported Definition PIDs $01 - $1F |
| $02: | Fault Code That Caused The Freeze Frame To Be Stored |
| $03: | Fuel System Status |
| $04: | Calculated Load Value |
| $05: | Coolant Temperature |
| $06: | Short Term Air Fuel Ratio |
| $07: | Long Term Air Fuel Ratio |
| $0B: | Intake Manifold Pressure |
| $0C: | Engine RPM |
| $0D: | Vehicle Speed |
| $0E: | Ignition Angle For #1 Cylinder |
| $0F: | Intake Air Temperature (IAT) |
| $10: | Mass Air Flow |
| $11: | Throttle Valve Position 1 Absolute (Throttle Valve Position 1) |
| $12: | Secondary Air Status |
| $13: | Oxygen Sensor Location |
| $15: | LSF / HEGO Values |
| $1C: | OBD Requirements |
| $1F: | Time After Engine Start |
| $20: | Supported Definition PIDs $21 - $3F |
| $21: | Distance Driven with MIL ON |
| $23: | Fuel Pressure (Rail Pressure) |
| $2E: | Activation Of Tank Vent Valve |
| $2F: | Tank Level |
| $30: | Delete Number of WUCs after Error Memory |
| $33: | Ambient Air Pressure |
| $40: | Supported Definition PIDs $41 - $5F |
| $42: | Control Modules System Voltage |
| $43: | Absolute Load Value |
| $44: | Specified Value Of Oxygen Sensor Signal |
| $45: | Relative Throttle Position |
| $46: | Ambient Air Temperature |
| $47: | Throttle Valve Position 2 Absolute (Throttle Valve Position 2) |
| $49: | Accelerator Pedal Position 1 Absolute (Accelerator Pedal Position Signal 1) |
| $4A: | Accelerator Pedal Position 2 Absolute (Accelerator Pedal Position Signal 2) |
| $4C: | Specified Throttle Valve Position |
| $51: | Fuel Type |
| $56: | Offset Oxygen Sensor Regulation After Catalytic Converter |
| $60: | Supported PIDs $61 - $80 |
| $70: | Boost Pressure Control |
-- Switch the ignition off.