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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 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 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 Yes Go to next step. No Go to No.26 "HOLD INDICATOR LIGHT DOES NOT 2 Check the value at the following PID using the • 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 • SSA/SS1 • SSB/SS2 • SSC/SS3 Are PID values okay? Yes Overhaul control valve body and repair or replace any No Go to next step. 4 Disconnect PCM. Yes Check the value at the following PIDs using the WDS or .) • TR • TSS • VSS Repair or replace any defective parts. No Repair open ground circuit. Reconnect PCM. |