Reading Mazda RX-7 FD & Series 5 FC Error Codes

To initiate the Self-Diagnosis function perform the following;

• FDs ONLY: Ground TEN terminal in Diagnosis Box (located on driver's side Strut Tower), by running wire from TEN terminal to ground terminal on battery.
• Series 5 FCs ONLY: Ground single green Diagnostics Connector (located in back of driver's side headlight, by leading Coil Pack) by running wire from connector to ground terminal on battery.
• Turn ignition switch to "ON" position.
• "Check Engine" light will flash.
• Series 4 FCs ONLY: Click Here

When reading ECU error codes the long flashes represent multiples of 10 (one long flash is equal to 10, two long flashes are equal to 20, three long flashes are equal to 30, etc.). Short flashes are representative of numbers 1 through 9 (one short flash is equal to 1, two short flashes are equal to 2, three short flashes are equal to 3, etc.)

Together, the long and/or short flashes represent an error code number representative of a failure.

• Example #A:   2 long flashes and 3 short flashes signify error code #23 (Fuel Thermosensor)
• Example #B:   9 short flashes signify error code #9 (Water Thermosensor)
• Example #C:   3 long flashes & 7 short flashes signify error code #37 (Oil Metering Pump)

Once an error code number is ascertained, review the chart below for diagnosis. If there is more than one failure present, the code numbers will be indicated in numerical order, lowest first. Error code(s) will repeat until ignition switch is turned off.

Once a failure has been repaired, you can erase the error codes from the ECU memory by performing the following:

1. Turn off the ignition switch
2. Remove ground wire from TEN Terminal (FD) or Diagnostics Connector (FC)
3. Disconnect the negative battery cable for 20 seconds
4. Depress brake pedal
5. Operate car in normal manner, then repeat Diagnosis Test to determine if failure has been corrected/repaired.

Last Updated on 4/06/06 By Chris Sanders