5A
DTC P2770 (No.25): Torque Converter Clutch (TCC) Circuit High
Wiring Diagram
1. TCC solenoid valve [A]: Terminal arrangement of TCM connector (M13 engine model with VVT) (viewed from harness side)
2. TCM [B]: Terminal arrangement of TCM connector (M13 engine model without VVT) (viewed from harness side)
3. A/T      
DTC Detecting Condition and Trouble Area
DTC detecting condition Trouble area
Voltage of TCC solenoid valve TCM terminal is high although TCM is commanding TCC solenoid to turn OFF.
• TCC solenoid valve circuit shorted to ground.
• Malfunction of TCC solenoid valve
• TCM
DTC Confirmation Procedure
WARNING:
• When performing a road test, select a place where there is no traffic or possibility of a traffic accident and be very careful during testing to avoid occurrence of an accident.
• Road test should be carried out with 2 persons, a driver and tester, on a level road.
1) Connect scan tool to DLC with ignition switch OFF.
2) Clear DTCs in TCM memory.
3) Start engine.
4) Keep engine running at idle speed in “P” range for 10 seconds or more.
5) Check DTC.
Troubleshooting
Step Action YES NO
1
Was A/T System Check performed?
Go to Step 2.
Go to A/T System Check .
2
Check TCC Solenoid Valve Circuit for IG Short
1) Connect valve body harness connector.
2) Disconnect TCM connectors.
3) Check for proper connection to TCM at terminal “E121-5” [A] or “E123-12” [B].
4) If connection is OK, turn ignition switch ON and measure voltage between terminal “E121-5” [A] or “E123-12” [B] of disconnected harness side TCM connector and ground.
Is it 0 – 2 V?
Go to Step 3.
“BLK/YEL” circuit shorted to power circuit.
3
Check TCC Solenoid Valve Resistance
1) Turn ignition switch OFF.
2) Disconnect valve body harness connector (1) on automatic transmission (2).
3) Check for proper connection to solenoid at “BLK/YEL” circuit.
4) Check resistance of solenoid valve.
Resistance of TCC solenoid valve
Resistance between TCC solenoid valve terminals of transmission side valve body harness connector: 11 – 15 Ω at 20 °C (68 °F)
Resistance between TCC solenoid valve terminals of transmission side valve body harness connector and transmission body: Infinity
Is check results satisfactory?
Intermittent trouble or faulty TCM. Check for intermittent referring to Intermittent and Poor Connection Inspection . If OK, substitute a known-good TCM and recheck.
Replace TCC solenoid valve or lead wire.