FUEL ADDITIVE PUMP UNIT INSPECTION[MZ-CD 1.6 (Y6)]

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Caution

•  Water penetrating the connector will cause sensor malfunction. To prevent this, be careful not to damage the wiring harnesses or the waterproof connector so as to cause water penetration.

Note

•  Before performing the following inspection, make sure to follow the procedure as indicated in the troubleshooting flowchart. (See HOW TO USE THIS MANUAL.)

KOEO/KOER Self Test

1.  Perform the “KOEO/KOER SELF TEST“ by using the M-MDS.

•  Inspect the corresponding DTC if a DTC has been stored.

Resistance Inspection

1.  Disconnect the fuel additive pump unit connector.

2.  Measure the resistance between fuel additive pump unit terminals C and D.

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•  If not as specified, replace the fuel additive tank (fuel additive pump unit and fuel additive tank component). (See FUEL ADDITIVE TANK REMOVAL/INSTALLATION[MZ-CD 1.6 (Y6)].)

Circuit Open/Short Inspection

1.  Remove the rear seat cushion.

2.  Disconnect the fuel additive control module connector. (See FUEL ADDITIVE CONTROL MODULE REMOVAL/INSTALLATION[MZ-CD 1.6 (Y6)].)

3.  Inspect the following wiring harness for an open or short circuit (continuity check).

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Open circuit

•  If there is no continuity, there is an open circuit. Repair or replace the wiring harness.

―  Fuel additive pump unit terminal C and fuel additive control module terminal 10

―  Fuel additive pump unit terminal D and fuel additive control module terminal 9

Short circuit

•  If there is continuity, there is a short circuit. Repair or replace the wiring harness.

―  Fuel additive pump unit terminal D and power supply

―  Fuel additive pump unit terminal D and body ground

―  Fuel additive pump unit terminal C and power supply