1991 Mazda b2600 How to remove codes

1991 MAZDA B2600
175,554 MILES
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CAMS AUTO
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I have made repairs to a 1991 Mazda B2600i. It is a 5 speed the motor is a 159. The date of manufacturing is October 1991. I do not have a scanner to use to remove the codes found before repairs were made.
Jan 27, 2014 at 10:40 AM
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JACOBANDNICKOLAS
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Have you tried disconnecting the battery for about 10 minutes?
Jan 27, 2014 at 10:54 AM
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CAMS AUTO
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Sorry. I asked the wrong question apparently. My supervisor just informed me that he wants to know how to find out what the codes ARE without using a scanner. I think that makes more sense.
Jan 27, 2014 at 11:02 AM
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JACOBANDNICKOLAS
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You need a scanner to read the codes to the best of my knowledge. To delete codes, do the following:
Disconnect battery ground cable for a minimum of 10 seconds to clear trouble code stored in the memory.

With Fuel Injected Models With OBD1

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.
Jan 29, 2014 at 8:25 AM