Johnston VT502 - Page 143

MA5:7
V Range 502 l 652 l 802 Maintenance Manual
Johnston Sweepers Limited
Chapter - Pneumatic System
1
Hold locator
notch at top
4
2
3
5
X10 and X11 pin designation
Pneumatic Valve Island - Fault situation 3
● Key on Chassis, JVM starts to boot up.
● VM10 LEDs
For 1-2 seconds after ignition on
Red ‘Error’ off
Green ‘Run’ off
Green 5V off
Solid Green 12/24V
After 2 seconds and until the JVM shows
the clock page
Red ‘Error’ off
Green ‘Run’ off
Green 5V off
Solid Green 12/24V
Once JVM shows the clock page
Red ‘Error’ off
Green ‘Run’ off
Green 5V off
Solid Green 12/24V
● VM10 will then not work correctly due to 5V
and Run LED being off
VM10 will not be shown on CAN, loss of
ignition feed to X10 connector
● Check continuity between X608 Pin 3 and
X10 pin 2 (X10 = Front M12 Connector)
Pneumatic Valve Island - Fault situation 4
● Key on Chassis, JVM starts to boot up.
● VM10 LEDs
For 1-2 seconds after ignition on
Quick flashing of Red ‘Error’
Quick Flashing of Green ‘Run’
Solid Green 5V
Solid Green 12/24V off
After 2 seconds and until the JVM shows
the clock page
Red ‘Error’ goes off
Slow flashing of Green ‘Run’
Solid Green 5V
Green 12/24V off
Once JVM shows the clock page
Red ‘Error’ remains off
Solid Green ‘Run’
Solid Green 5V
Green 12/24V off
● VM10 will then not work correctly due to
green 12/24V LED being off
VM10 will be shown on the CAN, loss of
ignition feed to X11 connector
● Check continuity between X608 Pin 3 and
X11 pin 2 (X11 = Rear M12 Connector)