Diagnostic plug I need the codes?

Tiny
LEREBELDEMONTREAL
  • MEMBER
  • 1992 MAZDA B2600
I cannot find my computer connector for a code scanner, I look everywhere under the dash no success. Also im trying to locate my crank sensor on the engine cannot find it! Please help me. Because my truck stall when running on the highway or while I stop at a corner. But then restart easily sometime it dos not start at all so please I need help to find it.
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Saturday, August 21st, 2010 AT 7:05 AM

16 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Test Connector


https://www.2carpros.com/forum/automotive_pictures/12900_d_2.gif




https://www.2carpros.com/forum/automotive_pictures/12900_ecu_10.jpg



The Test Connector is a green, one pin connector located in the engine compartment. When grounded, the test connector activates the self-diagnostic system and causes the dash mounted "CHECK" light to flash malfunction codes (California vehicles only).

Test connector signal can be checked at ECU terminal 1E. When ignition is switched "ON," MIL lamp should light for three seconds with terminal voltage reading below 2.5V. After three seconds, the MIL lamp should go out with terminal voltage now reading approximately 12V.

Crank angle sensor is part of the distributor assembly.
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Saturday, August 21st, 2010 AT 9:04 AM
Tiny
BILLMILL5050
  • MEMBER
  • 66 POSTS
  • 1991 MAZDA B2600
  • 108,000 MILES
I want toscan for computer error codes
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Friday, January 15th, 2021 AT 11:42 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
B-Series
1987-88On Right Front Fender Apron

1989-93
Engine Control Check Connector (Black 6-Pin)Near Windshield Washer Motor

Trouble Codes Connector (Green 1-Pin)Near Black 6-Pin Connector (Engine Control)

1994-95On Right Front Fender Panel
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Friday, January 15th, 2021 AT 11:42 AM (Merged)
Tiny
CAMS AUTO
  • MEMBER
  • 3 POSTS
  • 1991 MAZDA B2600
  • 175,554 MILES
Now that I have the correct information I need, I can ask the correct question. I have a 1991 Mazda B2600i with a 159 motor/5 speed. It was manufactured in October 1991. I have codes, but no scanner. How do I retrieve the codes without the use of a scanner?
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Friday, January 15th, 2021 AT 11:42 AM (Merged)
Tiny
CARADIODOC
  • MECHANIC
  • 33,689 POSTS
The method of reading codes is similar to how it's done on GM products. Check out this page:

https://www.2carpros.com/articles/diagnostic-trouble-codes-for-1995-and-earlier-mazda-cars-obd1
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Friday, January 15th, 2021 AT 11:42 AM (Merged)
Tiny
CAMS AUTO
  • MEMBER
  • 3 POSTS
My wiring diagram looks nothing like the one you sent. Most all my wires are black/yellow with one blue and two single yellows. But, my connectors look nothing like yours. Can you tell me what TEN stands for?

Cams auto
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Friday, January 15th, 2021 AT 11:42 AM (Merged)
Tiny
CARADIODOC
  • MECHANIC
  • 33,689 POSTS
I don't know what all the abbreviations mean. These are the standard Mazda diagnostic plugs. If your car has something different, you're going to need the manufacturer's service manual. That will show the plug and how to retrieve fault codes without a scanner.
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Friday, January 15th, 2021 AT 11:42 AM (Merged)
Tiny
BILLMILL5050
  • MEMBER
  • 66 POSTS
  • 1991 MAZDA B2600
  • 4 CYL
  • RWD
  • AUTOMATIC
  • 118,000 MILES
Read computer trouble codes?
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Friday, January 15th, 2021 AT 11:42 AM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
Here is a guide to help you step by step with instructions in the link below to show you how on your car.

https://www.2carpros.com/articles/diagnostic-trouble-codes-for-1995-and-earlier-mazda-cars-obd1

. Please let us know if you need anything else to get the problem fixed.
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Friday, January 15th, 2021 AT 11:42 AM (Merged)
Tiny
BILLMILL5050
  • MEMBER
  • 66 POSTS
One man said I could jumper wire between ground and ten plugs under the hood. But I don't know which two to jump
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Friday, January 15th, 2021 AT 11:42 AM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
https://www.2carpros.com/images/external/41990764.jpg.gif

When problems occur in ECU monitored input or output devices, test the system to find the cause. During testing, failures of input and output devices are retrieved from the ECU as malfunction code numbers and displayed on the dash mounted malfunction indicator light (MIL).

NOTE: The ECU constantly checks for input device malfunctions. However, it only checks for output device malfunctions in a 3 second period after the ignition switch is turned "ON" with test connector grounded. If there is more than one malfunction code present, the lowest number code is displayed first, followed by subsequent codes in numerical order. This procedure is only applicable to vehicles with an MIL system that will display codes.

INSPECTION PROCEDURE

Warm up engine to normal operating temperature and turn ignition "OFF."
Ground test connector (Green: 1-pin) with a jumper wire.

NOTE: Test connector is located next to self-diagnostic connector.

Turn ignition switch "ON."
If MIL illuminates, goes off, and stays off, no codes are present.
If MIL illuminates, goes off, and then starts flashing, codes are present.
Start engine and check for additional codes.
If any codes are retrieved, refer to Malfunction Code Charts under DIAGNOSTIC CHARTS. Repair as required.

AFTER-REPAIR PROCEDURE

Erase ECU malfunction code memory by disconnecting the negative battery cable and depressing the brake pedal for at least five seconds. Reconnect battery cable.
Ensure engine is at normal operating temperature. Ground test connector.
Turn ignition switch "ON."
If MIL illuminates, goes off, and stays off, no codes are present.
If MIL illuminates, goes off, and then starts flashing, codes are present.
Start the engine and check for additional codes.
If any codes are retrieved, repair problem and repeat after-repair procedure.
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Friday, January 15th, 2021 AT 11:42 AM (Merged)
Tiny
BILLMILL5050
  • MEMBER
  • 66 POSTS
Thanks but how do I jump ground and tens pin? What is tens pin? Do I jump green 1 to ground. The green 6 plug has 3 wires 1-yellow 2-blue and black and pin 5-yellow.1 plug green with red wire and 2pin yellow plug with 2 wires blue and black thanks
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Friday, January 15th, 2021 AT 11:42 AM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
The instructions stater there is a connector with a single green wire that you have to jump to ground.
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Friday, January 15th, 2021 AT 11:42 AM (Merged)
Tiny
WRENCHTECH
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Correction. The wire isn't green, the connector is. I see it in your picture.
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Friday, January 15th, 2021 AT 11:42 AM (Merged)
Tiny
BILLMILL5050
  • MEMBER
  • 66 POSTS
THANKS
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Friday, January 15th, 2021 AT 11:42 AM (Merged)

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