Range Rover. Manual - part 91
LAND ROVER V8
31
DESCRIPTION AND OPERATION
COMPONENT DESCRIPTIONS - from 99MY
Engine Control Module (ECM) - (from 99MY)
From 99MY the Engine Control Module (ECM) is a
Bosch Motronic 5.2.1. which is mounted in a plastic
"E-box" located on the LH side of the engine bay
bulkhead. The ECM is cooled by a dedicated fan,
which supplies cabin air into the plastic E-box to
provide a suitable temperature environment for the
ECM. The working temperature of the ECM is
monitored by an internal temperature sensor.
A. 9-pin connector (C0634)
B. 24-pin connector (C0635)
C. 52-pin connector (C0636)
D. 40-pin connector (C0637)
E. 9-pin connector (C0638)
The E-box is a moulded black plastic case which
houses the ECM and protects it from sources of
contamination. The ECM itself is contained in a cast
aluminium case. The ECM has 5 independent
connectors totalling 134 pins, of which up to 79 are
used, dependent on market variations. The ECM and
connectors can be accessed by positioning the cruise
control pneumatic actuator and pump assembly aside,
lifting the two plastic clips at the top of the e-box and
pulling the E-box lid upwards and out. The ECM is
held in position in the lid of the box by two plastic
brackets. The ECM connectors have to be
disengaged sequentially to release them from the unit.
Similarly, when the connectors are reconnected to the
ECM, the correct sequence must be observed.
Connectors C0634 and C0638 are square type and
have release buttons on their front face which have to
be pressed to enable them to be removed.