Action for non-repeatable malfunction

WARNING: This page is about a different car, the 2016 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.

If the malfunction does not recur, verify the malfunction cause by performing the following actions:

Verify that a DTC has been recorded in the memory using the M-MDS. (See ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS [ELECTRIC POWER STEERING (EPS)] .)
Perform a simulation test in the simulation mode based on the repair order form, record the data at that time, and detect the malfunction cause.
Shake the wiring harness or connector of the electrical component which is suspected to be the cause of the malfunction, and inspect for the occurrence of any malfunction or DTCs.

Fig 1: Shaking Wiring Harness Or Connector Of Electrical Component
Courtesy of MAZDA MOTORS CORP.
Inspect the female terminals for poor connection.

Fig 2: Inspecting Female Terminals For Poor Connection

Courtesy of MAZDA MOTORS CORP.