Mazda RX-8 Workshop Manual page 1928

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2011 - RX-8 - Transmission/Transaxle
DTC P0977 [SJ6A-EL]
DTC P0977 Shift solenoid B circuit malfunction (short to power/open circuit)
DETECTION
CONDITION
POSSIBLE
CAUSE
Open or short circuit in shift solenoid B signal system (while TCM monitors solenoid output voltage, the
voltage that differs from the signal output by CPU in TCM is detected).
Diagnostic support note:
The MIL illuminates if the TCM detects the above malfunction condition during first drive cycle.
A PENDING CODE is not available.
FREEZE FRAME DATA is available.
The AT warning light illuminates.
The DTC is stored in the TCM memory.
TCM connector or terminal malfunction
Couple component connector or terminal malfunction
Shift solenoid B connector or terminal malfunction
Shift solenoid B malfunction
Short to power in wiring harness between shift solenoid B terminal A and TCM terminal 1AB
TCM malfunction