Checking the signal cable for
interruption or shortcircuit
Tools:
885675 Break-out cable
88890053 Break-out cable
88890074 Multimeter
1 NOTICE! Cut the current with the main switch.
2
Disconnect the connector from the sensor
3 TAD1250-1252 and TWD1643/TWD1663/
TWG1663GE:
Connect adapter cable 885675 to the cable har-
ness connector to the engine control unit.
TAD950-952:
Connect adapter cable 88890053 to the cable har-
ness connector to the engine control unit.
4 Remove connector B from the engine control unit.
5 Use multimeter 88890074 to do a resistance meas-
urement against the engine control unit connector
B.
Measurement points Nominal value
2(885675)– 16(EMS2, conn.B)
(no fuel bleeding pump)
R ≈ 0 Ω
2(885675)– 18(EMS2, conn.B)
(no fuel bleeding pump)
R ≈ ∞ Ω
2(885675)– 17(EMS2, conn.B)
(no fuel bleeding pump)
R ≈ ∞ Ω
3(88890053) – 16(EMS2,
conn.B)
(with fuel bleeding pump)
R ≈ 0 Ω
3(88890053) – 18(EMS2,
conn.B)
(with fuel bleeding pump)
R ≈ ∞ Ω
3(88890053) – 17(EMS2,
conn.B)
(with fuel bleeding pump)
R ≈ ∞ Ω
NOTICE! Measurement is done to eliminate short cir-
cuiting or
breaks in the cable to the engine control unit.
IMPORTANT!
Be very careful when measuring inside the connector,
to ensure that no pin is damaged.
885 675
p0013475
30-2 Fault Tracing
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