Mazda RX-8 Manual page 1357

If the actual pattern of the VSS signal is not the same as the reference pattern, inspect and repair
•
the following items:
Wave pattern
No wave pattern (fixed at
HI)
No wave pattern (fixed at
LO)
Wave pattern HI is too
low
Wave pattern LO is too
high
Wave pattern too
wide/narrow
Connected terminals: 2K (+) and 2M (−)
•
Malfunction cause
Open circuit between VSS terminal (A)TCM terminal 2K
•
Open/Short circuit between VSS terminal (B)battery
•
Short circuit between VSS terminal (A)TCM terminal 2K
•
Harness malfunction between VSS terminal (A)TCM
•
terminal 2K
Insufficient output from the VSS
•
Poor connection (loose GND) between VSS terminal
•
(C)TCM terminal 2K
Metal shavings (foreign material) on VSS
•
Parking gear rotation fluctuation
•
(w) RX-8 Transmission (Manual & Auto)
Page 332