DTC P1766 TORQUE CONVERTER CLUTCH CONTROL FUNCTION
AT-7102flowchartSteps 1 and 2 reference 'clutch switching control solenoid valve connector F302 terminal 4', but P1766's earlier reference table targets terminal 1 (W/R, clutch pressure control solenoid valve). Possibly a manual typo (terminal 4 vs terminal 1, switching vs pressure); transcribed as printed. Step-3 CHECK DTC pointer AT-7103 suggests a P1767 follow-on page.
Diagnostic Procedure
DTC P1766 torque converter clutch control diagnostic flow
1
CHECK GROUND CIRCUIT
2
OK or NG
NG
Replace CVT assembly
OK / GO TO 2
3
GO TO 2.
4
CHECK POWER SOURCE CIRCUIT
5
OK or NG
NG
Repair or replace damaged parts.
OK / GO TO 3
6
GO TO 3.
7
CHECK DTC
8
OK or NG
NG
1. Perform TCM input/output signal inspection. 2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK
Inspection END