Checking supply cable, coolant
level switch
Tools:
885675 Break-out cable
88890074 Multimeter
1 NOTICE! Turn ignition off.
2 Disconnect the connector from the switch.
3
Connect break-out cable 885675 to the cable har-
ness connector to the engine control unit.
4 Use multimeter 88890074 for voltage measure-
ment.
5 NOTICE! Turn ignition on.
Measurement points Nominal value
1–2 U ≈ Battery voltage x 0.8
Checking negative cable, coolant
level switch
Tools:
885675 Break-out cable
88890074 Multimeter
1 NOTICE! Cut the current with the main switch.
2 Disconnect the connector from the switch.
3
Connect break-out cable 885675 to the cable har-
ness connector to the engine control unit.
4 Use multimeter 88890074 to do resistance meas-
urement against the engine control unit.
Measurement points Nominal value
2 – Battery negative R≈ 0 Ω
Checking coolant level switch
Tools:
88890074 Multimeter
NOTICE! The coolant level switch can be removed
without having to drain the coolant.
30-2 Fault Tracing
158 47701632 10-2013 © AB VOLVO PENTA