Readiness code

The readiness code appears as an 8-digit display on measured value block 086, display zone 1. Each of the 8 digits is allocated to a particular emission-related system.

The function of each of these systems is checked by the On Board Diagnostic (OBD) and the relevant position for the system in the 8-digit display is changed from "1" to "0" in a test sequence which must be fully completed.

The readiness code produced after successful completion of the test sequence is then "0 0 0 0 0 0 0 0" (measured value block 086, display zone 1).

If an individual test has been completed, but is "not OK", a DTC is entered in the DTC memory. Checking Diagnostic Trouble Code (DTC) memory. Refer to Diagnostic Trouble Code (DTC) memory, checking .

The readiness code is set to "1 1 1 0 0 1 0 1" if:

The DTC memory has been erased.
The voltage supply to the engine control module has been interrupted (e.g. the connector detached, battery disconnected).
A new engine control module has been installed.

In this case the readiness code must be reproduced. Refer to Readiness code, generating .

NOTE: When driving with varying loads the exhaust tests are initiated by the control module and the readiness code generates itself. In this case the concluding control is possibly omitted, i.e. it is not obvious whether the vehicle was handed over to the customer without any malfunctions.