READING & CLEARING CODES

1990 — 91 Vehicles

1. Turn the ignition switch ON and OFF several times and observe the ABS warning lamp.
2. If the ABS warning lamp illuminates constantly, set the system to the diagnosis indication mode as follows:
   1. Remove the drivers seat.
   2. Unplug the check connector from the under seat control unit.
   3. Connect terminal wires G/B and B at the check connector with a jumper wire.
   4. Start the engine. The system is now in the diagnosis mode.
3. Observe the ABS warning lamp. Count the flashes of the lamp.
4. Refer to the corresponding chart and correct the indicated item.

   Fig. 1: Setting the ABS diagnosis indication mode

   Fig. 2: Clearing the ABS trouble codes

   Fig. 3: ABS trouble codes

5. After repairs are made or components replaced, cancel the trouble code by following the steps below:
   1. Connect the G/R and G/B terminals of the check connector with a jumper wire.
   2. Turn the ignition switch to the ON position.
   3. Watch for the warning lamp to illuminate and wait 1–2 seconds.
   4. Turn the ignition switch OFF and disconnect the jumper wire.
   5. Start the engine and make sure the warning lamp goes OFF.

      NOTE: Only 1 trouble code will be erased, if multiple trouble codes exist, the above procedure must be repeated.

1992 — 98 Vehicles

NOTE: To access the codes on 1992–98 models, the following are required: Mazda System Selector Switch 49-BO19-9A0 and Self-Diagnosis Checker 49-HO18-9A1 or a scan tool. If a scan tool is used, be sure it is capable of pulling codes from ABS systems. Not all scan tools have this ability.

1. Connect the Mazda system selector switch and the self-diagnosis checker or a scan tool to the underhood data link connector and to a ground. Set the select switch on the checker to A and the system selector knob to position 3. On scan tools, access the ABS menu. Follow the menu on the scan tool to access the codes. If any codes are present it will display the code number and the corresponding circuit or component.
2. Turn the ignition switch ON and observe the checker display. Initially, code 88 should appear. If code 88 does not appear check the connections between the checker and the selector. After code 88 appears, watch for and record any other trouble codes.
3. After the proper repairs are made, the codes must be erased by doing the following:
   1. At the data link connector under the hood, connect the TBS terminal to GND.
   2. Turn the ignition switch to the ON position.
   3. Output all of the memorized trouble codes.
   4. After the first trouble code repeats itself, depress the brake pedal 10 times at intervals of less than 1 second. This will clear all trouble codes.

      Fig. 4: Connecting the ABS system selector and self-diagnosis checker to the 1992–98 vehicles