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.
Procedure
- Connect diagnostic tester → Diagnostic Tester, Connecting .
- Depending on the desired operating condition: switch on ignition
or start engine and let run at idle.
- Under address word 33, select "Diagnostic mode 2: Check operating conditions."
- Select desired operating condition "PID XX".
NOTE:
- The operating conditions are sorted by the PID (parameter-identifications).
- Bank 1 = Cylinder bank 1, in direction of travel, right
- Bank 2 = Cylinder bank 2, in direction of travel, left
- Measuring values of Engine Control Module (ECM) are displayed under "10 - Engine electronics" and measuring values of Transmission Control Module (TCM) are displayed under "1A - Transmission electronics".
| PID | Display measuring values | 10 - Engine electronics | 1A - Transmission electronics |
|---|---|---|---|
| 02: | DTC which triggered the current reception of all control module information | X | X |
| 03: | Condition of the fuel system | X | - |
| 04: | Calculated load condition value | X | X |
| 05: | Temperature of coolant/gear oil | X | X |
| 06: | Short time gasoline-air ratio bank 1 | X | - |
| 07: | Gasoline-air ratio bank 1 | X | - |
| 08: | Short time gasoline-air ratio bank 2 | X | - |
| 09: | Gasoline-air ratio bank 2 | X | - |
| 12: | Engine rotations per minute (RPM) | X | X |
| 13: | Vehicle speed | X | X |
| 17: | Throttle valve position (absolute) | X | X |
*PIDs that are not relevant are not listed.
If DTCs are displayed in "PID 02" :
- Repair stored malfunctions according to DTC table:
- SAE P0xxx-DTCs → SAE P0xxx Diagnostic Trouble Codes
- SAE P1xxx-DTCs → SAE P1xxx Diagnostic Trouble Codes
- SAE P2xxx-DTCs → SAE P2xxx Diagnostic Trouble Codes
- SAE P3xxx-DTCs → SAE P3xxx Diagnostic Trouble Codes
- SAE U0xxx-DTCs → SAE U0xxx Diagnostic Trouble Codes
- End diagnosis and switch ignition off.