Discovery II
ENGINE MANAGEMENT SYSTEM - V8
18-2-10 DESCRIPTION AND OPERATION
Connector 3 (C0636): This connector contains 52 pins and is used for most sensor and actuator inputs and outputs.
Sensor and actuator control is vital to ensure that the ECM maintains adaptive strategy
Pin out details connector C0636
Pin No.
Function
Signal type
Reading
1
Injector cylinder number 2
Output
Switch to earth
2
Injector cylinder number 5
Output
Switch to earth
3
Purge valve
Output, signal
PWM 12-0V
4
SAI vacuum solenoid valve (NAS vehicles from 2000MY
only)
Output
Switch to earth
5
Not used
-
-
6
Fuel tank pressure sensor (NAS vehicles with vacuum type,
EVAP system leak detection only)
Earth
0V
7
MAF sensor 5V supply
Output, reference
5V
8
Not used
-
-
9
MAF sensor earth
Earth
0V
10
TP sensor 5V supply
Output, reference
5V
11
Not used
-
-
12
Not used
-
-
13
Not used
-
-
14
Injector cylinder number 7
Output
Switch to earth
15
Injector cylinder number 6
Output
Switch to earth
16
SAI pump relay (NAS vehicles from 2000MY only)
Output
Switch to earth
17
CMP sensor
Earth
0V
18
Low range switch (manual transmission only)
Input, signal
Active low
19
Not used
-
-
20
CMP signal
Input, signal
Digital switch 0-12V
21
ECT sensor
Earth
0V
22
Coolant temperature signal
Input, signal
Analogue 0-5V
23
MAF sensor signal
Input, signal
Analogue 0-5V
24
TP sensor signal
Input, signal
Analogue 0-5V
25
TP sensor earth
Earth
0V
26
Not used
-
-
27
Injector cylinder number 3
Output
Switch to earth
28
Injector cylinder number 8
Output
Switch to earth
29
Hill decent control output
Output, signal
PWM 0-12V
30
EVAP canister vent solenoid (CVS) valve (NAS vehicles with
vacuum type, EVAP system leak detection only)
Output
Switch to earth
30
Leak detection pump solenoid (NAS vehicles with positive
pressure type, EVAP system leak detection only)
Output
Switch to earth
31
A/C condenser fan
Output
Switch to earth
32
CKP sensor signal
Input, signal
Analogue, 0-300V peak
33
Not used
-
-
34
IAT sensor signal
Input, signal
Analogue 0-5V
35
KS, RH bank earth
Earth
0V
36
KS, RH bank signal
Input, signal
Analogue
37
Not used
-
-
38
Not used
-
-
39
Not used
-
-
40
Injector cylinder number 4
Output
Switch to earth
41
Injector cylinder number 1
Output
Switch to earth
42
Idle air control valve open
Output, signal
PWM 12-0V
43
Idle air control valve close
Output, signal
PWM 12-0V
44
ECT sensor signal
Output, signal
PWM 0-12V