Electrical D ~
Ignition
+ve feed
Ignition +ve switched supply output I 01 03
06 Speed signal input
09 Traction Control input
10 Control valve control output
11 Ground
12 Ignition +ve input
14
15 ~
Stop
lamp input
17
1 Control switches input
18
j Gear select input
' Dump valve control output ~
20 I Vacuum
pump control output
15.3.2.2 Speed Control Module Pins
1 Pin No 1 Description I Comment
0
Feed to vacuum pump /control valve unit and
dump valve
via brake and clutch switches (or link)
0
0
1 10
A
11 'I n n 01 *O
I" " 1:
J86 1879
Fig. 1 Speed Control Module multi-pin Connector
15.3.2.3 Vacuum Pump /Control Valve Unit
The vacuum pump / control valve unit is located under the hood, behind the LH headlamp. When adjustment of the
throttle position is required, the pump and valve are 'pulsed' on/off by the SC CM to achieve the required vacuum and
hence vehicle speed.
15.3.2.4 Pressure Release Valve
The pressure release (or dump) valve is located adjacent to the vacuum pump /control valve module and opens, vent- ing system air pressure to atmosphere, when speed control is disabled.
X300 EDM 15.3 - 3 Issue 1 August 1994
