Mazda Mazda6 - Dtc P0743

K2–144
ON-BOARD DIAGNOSTIC
DTC P0743
A6E577018901213
DTC P0743 Torque converter clutch (TCC) solenoid valve circuit malfunction (open/short)
DETECTION
CONDITION
• Open or short in TCC solenoid signal system (while TCM monitors solenoid output voltage, the voltage that
differs from the ON/OFF signal output by CPU in TCM is detected).
Diagnostic support note:
• This is continuous monitor (CCM).
• MIL illuminates if TCM detects the above malfunction condition during first drive cycle.
• PENDING CODE is not available.
• FREEZE FRAME DATA is available.
• AT warning light does not indication.
• DTC is stored in TCM memory.
POSSIBLE
CAUSE
• Open circuit between TCC solenoid valve terminal A and TCM terminal 2S
• Short to ground between TCC solenoid valve terminal A and TCM terminal 2S
• Short to power between TCC solenoid valve terminal A and TCM terminal 2S
• TCC solenoid valve malfunction
• Damage connector between TCC solenoid valve and TCM
• TCM malfunction
2P
TCM
HARNESS SIDE CONNECTOR
TERMINAL COMPONENT
NO.1(12-PIN)
HARNESS SIDE CONNECTOR
COUPLER COMPONENT
(10-PIN)
PART SIDE CONNECTOR
TCC SOLENOID VALVE
HARNESS SIDE CONNECTOR
ATX
CPU
CPU
2S
2P
B
J
A
C
A
B
TCM
TCC SOLENOID VALVE