Mazda 626 Station Wagon, Workshop Manual

Page: 351 / 577

TROUBLESHOOTING
NO.7 NO SHIFTING
7 No shifting f
DESCRIPTION
• Single shift range only.
• Sometimes it shifts correctly.
POSSIBLE
CAUSE
• When the gear position is fixed in 3GR due to the fail-safe operation, the malfunction is in the ATX.
• Perform malfunction diagnosis according to No.6 “Low maximum speed and poor acceleration”.
1 . Clutch burned
• Line pressure low • Shift solenoid A malfunction
• Vehicle speed sensor malfunction • Shift solenoid B malfunction
• Input/turbine speed sensor malfunction • Shift solenoid C malfunction
• Sensor GND malfunction • Pressure control solenoid malfunction
• Shift solenoid D malfunction • Body GND malfunction
• Shift solenoid E malfunction • Control valve body malfunction
2.3GR is fixed (Operation in fail-safe function)
• Short or open circuit in wiring • Disconnected shift solenoid connector
• Poor connection of connector • Poor ground of shift solenoid
NO.8 DOES NOT SHIFT TO FOURTH GEAR (4GR)
8 Does not shift to fourth gear (4GR)
DESCRIPTION
• Vehicle does not upshift from 3GR to 4GR even though vehicle speed Increases.
• Vehicle does not shift to 4GR even though accelerator pedal is released in D range at 60 km/h {37 mph}.
POSSIBLE
CAUSE
• Basically, the TCC does not operate when the fail-safe is operating. Verify the DTC first. If the TCC
operates when driving at high speeds only, the malfunction (improper adjustment) is in the HOLD switch
circuit or TR switch circuit.
Caution
• If the TCC is stuck, inspect It. In addition, inspect the oil cooler for foreign particles which may
have mixed In with the ATF.
1 .TCC slippage, burned 1
• Line pressure low • Vehicle speed sensor malfunction
• TP sensor malfunction • Input/turbine speed sensor malfunction
• Engine coolant temperature sensor • Sensor GND malfunction
malfunction
2.Transaxle fluid temperature sensor malfunction
• Short or open circuit in wiring • Sensor malfunction
• Poor connection of connector
3.TR switch malfunction
• Short or open circuit in wiring • Selector lever adjustment incorrect ,
• Poor connection of connector • TR switch adjustment incorrect
• Sensor malfunction I
4. Shift solenoid A, shift solenoid E valve malfunction I
• Short or open circuit in wiring • Solenoid valve stuck
• Poor connection of connector
5. HOLD switch malfunction
6. Torque converter malfunction
7. Control valve body malfunction
K 2-144