On-Vehicle Inspection

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the negative battery cable.
Remove the air cleaner component. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZI-3.7] .)
Remove the TCM. (See TCM REMOVAL/INSTALLATION [AW6A-EL] .)
Verify that there is no continuity between the coupler component terminals B19 and GND or B20 and GND.

Fig 1: Identifying Coupler Component
Courtesy of MAZDA MOTORS CORP.
- If there is continuity, inspect the coupler component.
- If the coupler component is normal, perform an off-vehicle inspection of VSS. (See OFF-VEHICLE INSPECTION .)
NOTE:
- Inspect with a tester that can indicate more than 10 megohms and confirm that the value is more than 1 megohm.
Verify that there is continuity between coupler component terminals B19 and B20.

Fig 3: Identifying Coupler Component
Courtesy of MAZDA MOTORS CORP.
- If there is no continuity, inspect the coupler component.
- If the coupler component is normal, replace the VSS. (See VEHICLE SPEED SENSOR (VSS) REMOVAL/INSTALLATION [AW6A-EL] )