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 PIDs $01 - $20 |
| $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 Timing Advance For #1 Cylinder |
| $0F: | Intake Air Temperature |
| $10: | Air Flow Rate From Mass Air Flow Sensor |
| $11: | Absolute Throttle Valve Position 1 |
| $12: | Secondary Air Injection |
| $1F: | Time Since Engine Start |
| $20: | Supported PIDs $21 - $3F |
| $23: | Fuel Rail Pressure |
| $2E: | Commanded Evap Purge |
| $2F: | Fuel Level Input |
| $33: | Ambient Air Pressure |
| $40: | Supported PIDs $41 - $5F |
| $42: | Control Module Voltage |
| $43: | Absolute Load Factor |
| $44: | Specified Value Of Oxygen Sensor Signal |
| $45: | Relative Throttle Valve Position |
| $46: | Ambient Temperature |
| $47: | Throttle Valve Position 2 Absolute |
| $49: | Accelerator Pedal Position 1 Absolute |
| $4A: | Accelerator Pedal Position 2 Absolute |
| $4C: | Specified Throttle Valve Position |
| $51: | Type Of Fuel Currently Being Used |
| $56: | Offset Oxygen Sensor Regulation After Catalytic Convertor |
| $60: | Supported PIDs $61 - $80 |
| $67: | Coolant Temperature |
| $70: | Boost Pressure Control |
-- Switch the ignition off.