Range Rover P38
LAND ROVER V8
33
DESCRIPTION AND OPERATION
Input / Output
C0634: 9-pin connector
C0635: 24-pin connector
C0636: 52-pin connector
C0637: 40-pin connector
C0638: 9-pin connector
Connector 1 (C0634):
This connector contains 9 pins and is used primarily for ECM power input and earth. The ECM requires a
permanent battery supply, if this permanent feed is lost i.e. the battery discharges or is disconnected, the ECM will
lose its adapted values and its Diagnostic Trouble Codes (DTC). These adapted values are a vital part of the
engine management’s rolling adaptive strategy. Without an adaptive strategy, driveability, performance, emission
control and fuel consumption are adversely affected. The ECM can be affected by high voltage inputs, so care
must be taken when removing and replacing the ECM.
ECM pin details for Connector C0634:
Pin No.
Description
Input/Output
Voltage
1
Ignition position "II"
Input
12V
2
Not used
-
-
3
Not used
-
-
4
Chassis ground
Ground
0V
5
Fuel injector ground
Ground
0V
6
Power stage ground
Ground
0V
7
Battery supply
Input
12V
8
Main relay switched supply
Input switched
0 - 12V
9
Not used
-
-
