Mazda 6 2002 - Page 495

TROUBLESHOOTING
K121
K
Diagnostic procedure
End Of Sie
POSSIBLE
CAUSE
• Basically, TCC does not operate when fail-safe is operating. Verify the DTCs first. If the TCC operates
when driving at high speeds only, 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 piston slipped, burned
• Line pressure low
• TP sensor malfunction
• Engine coolant temperature sensor malfunction
• Vehicle speed sensor malfunction
• Input/turbine speed sensor malfunction
• Sensor GND malfunction
2. Transaxle fluid temperature sensor malfunction
• Short or open circuit in wiring
• Poor connection of connector
• Sensor malfunction
3. TR switch malfunction
• Short or open circuit in wiring
• Poor connection of connector
• Sensor malfunction
• Selector lever adjustment incorrect
• TR switch adjustment incorrect
4. Shift solenoid A, shift solenoid B, shift solenoid D valve malfunction
• Short or open circuit in wiring
• Poor connection of connector
• Solenoid valve stuck
5. HOLD switch malfunction
6. Control valve body malfunction
Note
• Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic
and Automatic Transaxle Basic Inspection are conducted.
STEP INSPECTION ACTION
1 With indicator switch at ON, does HOLD
indicator light indication correspond to HOLD
switch operation?
Yes Go to next step.
No Go to No.26 "HOLD INDICATOR LIGHT DOES NOT
ILLUMINATE WHEN HOLD SWITCH IS TURNED ON.",
No.27 "HOLD INDICATOR LIGHT ILLUMINATES WHEN
HOLD SWITCH IS NOT TURNED ON."
2 Check the value at the following PID using the
WDS or equivalent. (See F45 PCM
INSPECTION.)
• TFT
• TFTV
Is PID value okay?
Yes Go to next step.
No Repair or replace any defective parts.
3 Check the value at the following PIDs using the
NGS tester. (See F45 PCM INSPECTION.)
• SSA/SS1
• SSB/SS2
• SSC/SS3
Are PID values okay?
Yes Overhaul control valve body and repair or replace any
defective parts. If problem remains, overhaul transaxle and
repair or replace any defective parts. (See ATX workshop
manual (FN4A-EL) [1623-10-98E].) (See ATX workshop
manual supplement (FN4A-EL) [1746-1*-02C].)
No Go to next step.
4 Disconnect PCM.
Is resistance between ground terminal at PCM
connector and body ground less than 5.0
ohms?
Yes Check the value at the following PIDs using the WDS or
equivalent. (See F45 PCM INSPECTION.)
• TR
• TSS
• VSS
Repair or replace any defective parts.
No Repair open ground circuit. Reconnect PCM.