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 (TID), Hex-ID, Component-ID (CID), 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 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.
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 thru $20 |
| 02: | Fault code that caused the freeze frame to be stored |
| 03: | Fuel system status |
| 04: | Calculated load value |
| 05: | Coolant temperature |
| 06: | Oxygen sensor integrator |
| 07: | Oxygen sensor adaptation value |
| $0C: | engine speed |
| $0D: | vehicle speed |
| $0E: | firing angle |
| $0F: | Intake air temperature |
| $12: | Status secondary air injecting (only SULEV) |
| $1F: | Time after engine start |
| $20: | supported definition PIDs $21 thru $40 |
| $23: | Intake air temperature (IAT) |
| $2E: | Air mass |
| $33: | Ambient pressure |
| $40: | supported definition PIDs $41 thru $60 |
| $42: | Controller system tension |
| $43: | Absolute load factor |
| $44: | Lambda desired value |
| $45: | Butterfly valve position relative |
| $46: | Ambient temperature |
| $47: | Butterfly valve position 2 absolute |
| $49: | Driving pedal position 1 absolute |
| $4A: | Driving pedal position 2 absolute |
| $4C: | Butterfly valve target position |
| $56: | Specified value of oxygen sensor signal |
-- Switch the ignition off.