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WesTech Technical Information - Mazda Code Retrieval
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Accessing Diagnostic Trouble Codes

Carbureted Models

System malfunctions detected and stored in the emission control unit can be displayed using the self-diagnosis checker tool No. 40-H018-9A1. Any current or memorized malfunctions are indicated by a displayed code number and a corresponding buzzer. A monitor lamp on the checker indicates oxygen sensor operation. A normal air/fuel ratio is indicated by a continuous flashing of the lamp. The lamp will not light continuously if the air/fuel is lean and will not light at all if the mixture is rich. Refer to the manufacturers instructions for operating procedures of the self-checker tool.

Fuel Injected Models

A system selector tool No. 49-B019-9AO or equivalent on OBD systems and tool No. 49-T088-OAO or equivalent on OBD II systems, can be used to diagnose the main input or output devices. Systems are displayed as code numbers appearing on the system checker. Refer to the manufacturers instructions for operating procedures.

Clearing Diagnostic Trouble Codes

Carbureted Models

Disconnect battery ground cable for a minimum of 10 seconds to clear trouble code stored in the memory.

Fuel Injected Models With OBD

Disconnect battery ground cable for a minimum of 10 seconds, then depress brake pedal five times to clear trouble code's stored in the memory.

Fuel Injected Models With OBD II

Connect SST (NGS) tool to data link connector 2. Then select "Clear Diagnosis Codes" function and erase diagnostic trouble codes from the NGS memory.


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