Diagnostic Mode 01 - Read Current System Data
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).
Diagnostic Mode 01 makes it possible to access current emissions-related measured values and diagnostic data. The original measured values (no replacement values), input and output data and system status information are displayed using Diagnostic Mode 1.
Test requirement
- Coolant temperature at least 80° C.
Procedure
-- Connect the scan tool.
-- Start the engine and run at idle.
-- Select "Diagnostic Mode 1: Obtain data.".
-- From the following table, select the desired "PID" that is to be monitored, e.g. "PID $05 Coolant Temperature".
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 |
| $01: | Monitoring status since erasing DTC memory |
| $03: | Fuel system status |
| $04: | Calculated load value |
| $05: | Coolant temperature |
| $06: | Short term air fuel ratio |
| $07: | Long term air fuel ratio |
| $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 position |
| $12: | Secondary Air Injection |
| $13: | Oxygen Sensor Bank 1 Sensor 1 |
| $15: | Oxygen Sensor Bank 1 Sensor 2 |
| $1C: | OBD requirements |
| $1F: | Time since engine start |
| $20: | Supported definition PIDs $21 thru $40 |
| $21: | Distance driven with MIL ON |
| $23: | Fuel rail pressure |
| $2E: | Commanded evap purge |
| $2F: | Tank level |
| $30: | Warm up counts after MIL erased |
| $31: | Distance driven after erasing DTC memory |
| $33: | Barometric pressure |
| $34: | Heater current Bank 1 Sensor 1 |
| $3C: | Calculated catalyst temperature |
| $40: | Supported definition PIDs $41 thru $60 |
| $41: | Monitor status current drive cycle |
| $42: | Control module voltage |
| $43: | Absolute load value |
| $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: | Fuel type |
| $56: | Offset oxygen sensor regulation after catalytic convertor |
-- Ignition switched OFF.