FUEL ADDITIVE CONTROL MODULE INSPECTION [MZ-CD 1.6 (Y6) (EURO4 emission level)]


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Note
•  The fuel additive control module terminal voltage can vary with conditions when measuring and changes due to age deterioration on the vehicle, causing false diagnosis. Therefore a comprehensive inspection of the input and output systems, and the fuel additive control module is necessary to determine where the malfunction occurs.
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Terminal

Signal name

Connected to

Measurement condition

Voltage (V)

Inspection item(s)

1
Power supply
Battery
Under any condition
B+
•  Related wiring harness
2
3
IG1 signal
Ignition switch
Switch the ignition ON
B+
•  Ignition switch
•  Related wiring harness
4
5
6
Controller area network (low)
Controller area network (low)
Because this terminal is for CAN, determination by terminal voltage is not possible
•  Related wiring harness
7
Controller area network (high)
Controller area network (high)
Because this terminal is for CAN, determination by terminal voltage is not possible
•  Related wiring harness
8
Ground
Body Ground
Under any condition
1.0 or less
•  Related wiring harness
9
Fuel additive pump control signal
Fuel additive pump unit
For several tens of seconds after fueling and switch the ignition ON
B+
•  Fuel additive pump unit
•  Related wiring harness
10
Ground for fuel additive level sensor and fuel additive pump unit
Fuel additive level sensor
Under any condition
1.0 or less
•  Fuel additive level sensor
•  Fuel additive pump unit
•  Related wiring harness
11
Fuel additive level sensor reference signal
Fuel additive level sensor
•  Fuel additive level sensor
•  Related wiring harness
12
13
Fuel additive level sensor signal
Fuel additive level sensor
•  Fuel additive level sensor
•  Related wiring harness
14
15
Fuel-filler switch (–) signal
Fuel-filler switch
Under any condition
1.0 or less
•  Fuel-filler switch
•  Related wiring harness
16
Fuel-filler switch (+) signal
Fuel-filler switch
Fuel-filler lid is open
6.85
•  Fuel-filler switch
•  Related wiring harness
Fuel-filler lid is closed
B+