Element inspection
WARNING: This page is about a different car, the 2005 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
- Verify using an oscilloscope that the wave pattern for the turbine sensor signal that is input to TCM terminal 2G is the same as the reference wave pattern.
- If the actual pattern of the turbine sensor signal is not the same as the reference pattern, inspect and repair the following items:WAVE PATTERN AND MALFUNCTION CAUSE
Wave pattern Malfunction cause No wave pattern (fixed at HI) - Open circuit between turbine sensor terminal (A)-TCM terminal 2G
- Open/Short circuit between turbine sensor terminal (B)-battery
No wave pattern (fixed at LO) - Short circuit between turbine sensor terminal (A)-TCM terminal 2G
Wave pattern HI is too low - Harness malfunction between turbine sensor terminal (A)-TCM terminal 2G
- Insufficient output from the turbine sensor
Wave pattern LO is too high - Poor connection (loose GND) between turbine sensor terminal (C)-TCM terminal 2G
Wave pattern too wide/narrow - Metal shavings (foreign material) on turbine sensor
- Reverse and high clutch drum rotation fluctuation
- Connected terminals: 2G (+) and 2M (-)
- Equipment setting: 5V/DIV (Y): 250 microseconds/DIV (X)
- Measuring conditions: M range, 1st gear at 20 km/h {12 mph}
- If the actual pattern of the turbine sensor signal is not the same as the reference pattern, inspect and repair the following items:
- Verify the wave pattern of the turbine sensor signal again, and if the malfunction is not resolved, replace turbine sensor.