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Mazda CX-5 Service & Repair Manual: Air Fuel Ratio (A/F) Sensor Heater Control

Mazda CX-5 Service & Repair Manual / Engine / Control / Air Fuel Ratio (A/F) Sensor Heater Control

Outline

Block Diagram


Operation

Pre-heater control

Normal control


Output duty ratio

Control condition

0%

  • Ignition switched off

  • Engine stopped

  • Engine start (cranking)

0?100%

(Duty ratio determined by measuring the element temperature by the A/F sensor heater element impedance)

  • After engine warm-up (value fluctuates by battery condition, etc.)


Accelerator Pedal Position (App) Sensor
Purpose/Function Detects the accelerator pedal depression amount as basic information for mainly determining the throttle valve opening. Detects the accelerator pedal depression amou ...

Air Fuel Ratio (A/F) Sensor Inspection
A/F Sensor Inspection 1. Connect the M-MDS to the DLC?2. 2. Switch the ignition ON (engine on). 3. Warm up the engine to normal operating temperature. 4. Access the following PIDs using the M-M ...

Other materials:

Dashboard Under Cover Removal/Installation
1. Detach hooks A in the direction of arrow (1) shown in the figure. 2. Pull the dashboard under cover in the direction of arrow (2) while detaching pins B. 3. Remove the dashboard under cover in the direction of the arrow (3) shown in the figure while detaching the guide C. CAUTION: ...

Shroud Side Member Removal [Panel Replacement]
Symbol Mark Removal Procedure 1. Drill the 3 locations indicated by (A) shown in the figure. 2. Drill the 8 locations indicated by (B) and 2 locations indicated by (C) shown in the figure. NOTE: When drilling the 3 locations indicated by (A) and 2 locations indicated by (C) sh ...

DSC HU/CM Inspection
1. Disconnect the DSC HU/CM connector.. 2. Connect the negative battery cable.. 3. Attach the tester lead to the DSC HU/CM wiring harness-side connector and inspect voltage, continuity, or resistance according to the standard (reference) on the table. Standard (Reference) ...

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