Checking the power supply for the control module

Fig 1: Identifying Ignition ON

GLL101051

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Connecting Connector

GLL101069

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Disconnecting Connector

GLL101003

Courtesy of VOLVO CARS OF NORTH AMERICA.

Ignition off.
Disconnect the control module.
Connect the brake valve.
Connect the clutch valve (manual transmissions).
Ignition on.
Pedals unaffected.
Connect a voltmeter between control module connector terminal #3 and ground.

The voltmeter should read approximately 0 V when the selector switch is in the OFF position. The voltmeter should read battery voltage when the selector switch is in the ON position.
1. The value is OK. Refer to Checking the control module connectors
2. The voltage is constantly 0 V. Refer to Checking the cable between the brake valve/clutch valve and the control module .
3. The voltage is constantly 12 V. Refer to Checking for a short-circuit .
Fig 4: Identifying 14-Pin Connector
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 5: Identifying Voltage Display
Courtesy of VOLVO CARS OF NORTH AMERICA.