Checking negative cable, water in
fuel switch
Tools:
88890074 Multimeter
1 NOTICE! Cut the current with the main switch.
2
Disconnect the connector from the switch.
3 Use multimeter 88890074 to do resistance meas-
urement against the engine control unit.
Measurement points Nominal value
Black conductor –
Battery negative
R ≈ 0 Ω
Checking water in fuel switch
Tools:
9990014 Break-out cable
9998699 Break-out box
88890074 Multimeter
1 NOTICE! Cut the current with the main switch.
2 Connect break-out cable 9990014 with break-out
box
9998699 between EMS 2 (connector B) and the
switch.
3 Use multimeter 88890074 for voltage measure-
ment.
4 Turn ignition on.
Measurement points Nominal value
10 - 8 Switch immersed in
fuel
U ≈ 0,8 x battery voltage
10 - 8 Switch immersed in
water
U ≈ 0,8 x battery voltage -
5 V
P0013419
30-2 Fault Tracing
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