Readiness Code Function

Readiness Code

Function
The readiness code is an 8-digit number block that indicates the results of an emission relevant On Board Diagnostic (OBD).

When the diagnostic for a system (e.g.: Secondary Air Injection (AIR) system) has run through successfully, the respective digit of the number block is set from 1 to 0.

Diagnostics are performed at regular intervals during normal vehicle operation. After repairing an emissions-related system, the readiness code should be generated via a road test to ensure that these systems are working according to specifications. If a malfunction is recognized during the diagnostic, it is stored in DTC memory.

The readiness code is erased every time the DTC memory is erased and every time the voltage supply is interrupted. For this reason, only erase the DTC memory if there is a DTC stored in it.

Readiness Code, Reading Out

NOTE:
- The values shown depend on engine code.

Requirements
- There must not be any DTCs stored in DTC memory. Diagnostic Mode 03 - Read DTC Memory
- Coolant temperature must be at least 80 degrees C, Diagnostic Mode 01 - Read Current System Data Diagnostic mode 1: Check measured values; PID 5, Coolant temperature.

Work Procedure
- Connect diagnostic tester. Diagnostic Tester, Connecting
- Start engine and let run at idle.
- Under address word 33, select "Diagnostic mode 1: Checking measuring values."
- select desired measuring value "PID 01".
- Observe the right 8-digit number block:

If all diagnoses have run through successfully, the 8-digit number block

Specified value: 00000000

must be displayed.