No.10 Does Not Shift To 4GR: Notes

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.

DOES NOT SHIFT TO 4GR DESCRIPTION AND POSSIBLE CAUSE

10	Does not shift to 4GR
DESCRIPTION	Vehicle does not upshift from 3GR to 4GR even though vehicle speed is increased. Vehicle does not shift to 4GR even though accelerator pedal is released in D range at 60 km/h {37 mph}.
POSSIBLE CAUSE	Oil temperature of TFT sensor is low (4GR is inhibited when temperature is 5 °C {41 °F} or below. ) Improper adjustment of TR switch Control valve body malfunction (improper operation, stuck, clogged oil passage) Hydraulic circuit clogging (shift solenoid A) Control valve spool malfunction TFT sensor malfunction Short or open circuit in wiring Poor connection of connector Sensor malfunction NOTE: Before following the troubleshooting steps, make sure that the Automatic Transmission On-Board Diagnostic and Automatic Transmission Basic Inspection are conducted. (See BASIC INSPECTION .)

Does not shift to 4GR

DESCRIPTION

Vehicle does not upshift from 3GR to 4GR even though vehicle speed is increased.
Vehicle does not shift to 4GR even though accelerator pedal is released in D range at 60 km/h {37 mph}.

POSSIBLE CAUSE

Oil temperature of TFT sensor is low (4GR is inhibited when temperature is 5 °C {41 °F} or below. )
Improper adjustment of TR switch
Control valve body malfunction (improper operation, stuck, clogged oil passage)
- Hydraulic circuit clogging (shift solenoid A)
- Control valve spool malfunction
TFT sensor malfunction
- Short or open circuit in wiring
- Poor connection of connector
- Sensor malfunction
NOTE:
- Before following the troubleshooting steps, make sure that the Automatic Transmission On-Board Diagnostic and Automatic Transmission Basic Inspection are conducted. (See BASIC INSPECTION .)