Mazda RX-8 Manual page 1116

NO.11 ABNORMAL SHIFTING
11 Abnormal shifting
DESCRIPTION
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POSSIBLE
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CAUSE
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NOTE:
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Diagnostic procedure
STEP INSPECTION
With the ignition switch at the ON position,
does the gear position indicator light
1
indication correspond to the selector lever
position?
2 Disconnect the solenoid valve connector.
Shifts incorrectly (incorrect shift pattern).
Improper adjustment of TR switch
Transmission fixed in 3GR (fail-safe function)
Input/output signal malfunction (VSS, TCC solenoid, shift solenoids A, B, C
and F)
Maximum speed is low or acceleration is poor because 3GR is fixed
•
as a fail-safe. In such a case, DTC is stored.
Improper TCM ground
Transmission is mechanically fixed in 3GR if TCM stops operating
•
due to improper TCM ground. In such a case DTC is not stored.
Clutch spillage
In the event of clutch slippage, a DTC (incorrect gear ratio) is output.
Control valve body malfunction (improper operation, stuck, clogged oil passage)
Hydraulic circuit clogging (TCC solenoid, shift solenoids A, B, C and F)
Control valve spool malfunction
Torque converter malfunction (TCC piston is cracking or peeling.)
Before following the troubleshooting steps, make sure that the Automatic
Transmission On-Board Diagnostic and Automatic Transmission Basic Inspection
are conducted. (See BASIC INSPECTION .)
ACTION
Yes Go to the next step.
Go to No.29 "GEAR POSITION INDICATOR
LIGHT DOES NOT ILLUMINATE IN M
No RANGE", or No.30 "GEAR POSITION
INDICATOR LIGHT ILLUMINATES IN D
RANGE OR P, N, R POSITIONS".
Yes Go to the next step.
(w) RX-8 Transmission (Manual & Auto)
Page 91