Mazda 3 Service Manual: Intermediate Sensor Inspection FS5 A EL

Mazda 3 Service Manual: Intermediate Sensor Inspection [FS5 A EL]

On-Vehicle Inspection

1. Inspect the power supply circuit for the intermediate sensor.

a. Set the battery component (ex: battery, battery tray and PCM component) out of the way.

b. Disconnect the intermediate sensor connector.


c. Switch the ignition to ON (engine off).

d. Measure the voltage at intermediate sensor connector terminal A (harness-side).


  • If there is any malfunction, repair wiring harness between intermediate sensor and AT main relay.

  • Intermediate sensor specification
  • B+

e. Switch the ignition to off.

f. Connect the intermediate sensor connector.

2. Inspect the GND circuit for the intermediate sensor.

a. Switch the ignition to off.

b. Measure the voltage at intermediate sensor connector terminal C (harness-side).


  • If there is any malfunction, repair wiring harness between intermediate sensor and GND.

  • Intermediate sensor specification
  • Below 1.0 V

3. Inspect the signal circuit for the intermediate sensor.

a. Connect the oscilloscope to the following TCM connector terminals and set it as below.

  • (+) lead: TCM terminal AC

  • (-) lead: battery negative terminal

  • Oscilloscope setting: 1 V/DIV (Y), 200 μs/DIV (X), DC range

b. Start the engine.

c. Measure the wave form when the following conditions are met.

  • Gear position: 3GR

  • Vehicle speed: 30 km/h {19 mph}


  • If there is any malfunction, replace the intermediate sensor..

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  • Mazda 3 Service Manual: Intermediate Sensor Inspection FS5 A EL

    Mazda 3 Service Manual: Intermediate Sensor Inspection FS5 A EL

    Mazda 3 Service Manual: Intermediate Sensor Inspection FS5 A EL

    Mazda 3 Service Manual: Intermediate Sensor Inspection FS5 A EL

    Mazda 3 Service Manual: Intermediate Sensor Inspection FS5 A EL

    Mazda 3 Service Manual: Intermediate Sensor Inspection FS5 A EL

    Mazda 3 Service Manual: Intermediate Sensor Inspection FS5 A EL

    Mazda 3 Service Manual: Intermediate Sensor Inspection FS5 A EL

    Mazda 3 Service Manual: Intermediate Sensor Inspection FS5 A EL

    Mazda 3 Service Manual: Intermediate Sensor Inspection FS5 A EL

    Mazda 3 Service Manual: Intermediate Sensor Inspection FS5 A EL

    Mazda 3 Service Manual: Intermediate Sensor Inspection FS5 A EL

    Mazda 3 Service Manual: Intermediate Sensor Inspection FS5 A EL

    Mazda 3 Service Manual: Intermediate Sensor Inspection FS5 A EL

    Mazda 3 Service Manual: Intermediate Sensor Inspection FS5 A EL

    Mazda 3 Service Manual: Intermediate Sensor Inspection FS5 A EL

    Mazda 3 Service Manual: Intermediate Sensor Inspection FS5 A EL

    Mazda 3 Service Manual: Intermediate Sensor Inspection FS5 A EL

    Mazda 3 Service Manual: Intermediate Sensor Inspection FS5 A EL

    Mazda 3 Service Manual: Intermediate Sensor Inspection FS5 A EL