MP4.2+6.0

(agrees with what I said in preceding posts; note it says cruise control must be coded to agree with ECU's too.)

Notes on Maintenance

Because of the Twin Control Module
Concept, there are several factors to
remember when using diagnostic testers
and the self-diagnosis function

Regarding self-diagnosis, the two control
modules should be viewed as separate
entities (this does not apply to misfire
detection).

The self-diagnosis functions are
implemented in the control module to
which the components are connected (with
the exception of combustion missing
detection).

Separate address words are required for
entry into self-diagnosis function:
Address word 01 ECM 1 (J623)
Cylinder Bank 1
(Exhaust Banks 1 and 2)
Address word 11 ECM 2 (J624)
Cylinder Bank 2
(Exhaust Banks 3 and 4)

If a fault has been stored in ECM 2, the fault
"Please read out fault memory of ECM 2" is
stored in ECM 1. This fault message can
only be erased when there is no fault entry
stored in ECM 2.

Both control modules must:
--have the same software version
--be matched to the Cruise Control
System (CCS)
--be matched to the Immobilizer
--be viewed as separate entities for selfdiagnosis
--have the same encoding