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+

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
16	Fuel-filler switch (+) signal	Fuel-filler switch	Fuel-filler lid is closed	B+	• Fuel-filler switch • Related wiring harness