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Home >> Mazda >> 2011 >> CX-9 Sport, 3.7 V, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System [MZI-3.7] >> Knock Sensor (KS) Removal/Installation
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Knock Sensor (KS) Removal/Installation

NOTE:
  • Put a tray under the converter housing to receive the engine coolant.
    Fig 1: Identifying Tray Position
    G04969711Courtesy of MAZDA MOTORS CORP.
  1. Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7] .)
  2. Perform the following procedure for easier access.
    1. Remove the ventilation hose. (See QUICK RELEASE CONNECTOR (EMISSION SYSTEM) REMOVAL/INSTALLATION .)
    2. Remove the vacuum hose (to purge solenoid valve). (See QUICK RELEASE CONNECTOR (EMISSION SYSTEM) REMOVAL/INSTALLATION .)
    3. Remove the fuel hose. (See QUICK RELEASE CONNECTOR REMOVAL/INSTALLATION .)
    4. Remove the fuel distributor. (See FUEL INJECTOR REMOVAL/INSTALLATION .)
    5. Remove the intake manifold. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION .)
  3. Remove in the order indicated in the table.
    KS COMPONENT REMOVAL ORDER

    1 Water inlet pipe
    2 O-ring
    3 KS connector
    4 KS
    Fig 2: Knock Sensor Replacement Components With Torque Specifications
    G00512275Courtesy of MAZDA MOTORS CORP.
    NOTE:
    • Lubricate the new O-ring with clean engine coolant for installation.
  4. Install in the reverse order of removal.
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