P1364

Coil-on-plug (COP) control circuit - ignition feedback (IGF) signal error

Detection Condition

• Ignition coil IGF signal is not correctly sent to the ECU while engine rotates for approximately 12 cycles

Possible Causes

• Ignition coil malfunction
• Open or short circuit in wiring from ignition coil terminal B to ECU
• Open or short circuit in wiring from ignition coil terminal D to ECU

[P1364 - From 1995 Mazda Millenia factory service manual]

Notes: 1995-1996 KJ engine management utilizes 4-terminal ignition coils while 1997+ models use 3-terminal coils (missing terminal D).  Using a 3-terminal coil in conjunction with an ECU expecting a 4-terminal coil will result in an open circuit condition for terminal D and P1364 while 4-terminal coils are interchangeable in either application.