Question about 1995 Isuzu Rodeo

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Location of aldl connector on 1995 rodeo

Where do i find ALDL connector to scan codes

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Posted on Jan 02, 2017

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SOURCE: Want to check for trouble codes, can't find the

Hello veloruss: My name is Roger and I will try to answer your question so you can locate the terminal. You will find the ALDL connector on the right side of the drivers dash in the area of the gas pedal. Locate the white 3 wire connector. you will also see a green 3 wire connector with a single wire connector. Make sure you use the white 3 wire connector.Jump wires 1 and 3 together to obtain the computer codes. Should you need further help please just ask. Please rate the quality of the answer. This way I know the answer was correct. Thank You for using Fix Ya. Roger

Posted on Oct 08, 2009

  • 4 Answers

SOURCE: Regarding finding the ALDL connector on my 93

See my photo showing the diagnostic connector on the 1993 Isuzu.

I posted the answer on FixYa but the language I used calls the connector an OBD (on board diagnostics) connector.

http://www.fixya.com/PostComment.aspx?thid=1584937&prdid=0&ctgid=231

Posted on Oct 25, 2009

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1995 buick regal check engine light location



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See Figure 1
Listings of the trouble for the various engine control system covered in this manual are located in this section. Remember that a code only points to the faulty circuit NOT necessarily to a faulty component. Loose, damaged or corroded connections may contribute to a fault code on a circuit when the sensor or component is operating properly. Be sure that the components are faulty before replacing them, especially the expensive ones.


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Fig. Fig. 1: ALDL connector - 1988-92 models
The Assembly Line Diagnostic Link (ALDL) connector or Data Link Connector (DLC) may be located under the dash and sometimes covered with a plastic cover labeled DIAGNOSTIC CONNECTOR.

  1. The diagnostic trouble codes can be read by grounding test terminal B . The terminal is most easily grounded by connecting it to terminal A (internal ECM ground). This is the terminal to the right of terminal B on the top row of the ALDL connector.
  2. Once the terminals have been connected, the ignition switch must be moved to the ON position with the engine not running.
  3. The Service Engine Soon or Check Engine light should be flashing. If it isn't, turn the ignition OFF and remove the jumper wire. Turn the ignition ON and confirm that light is now on. If it is not, replace the bulb and try again. If the bulb still will not light, or if it does not flash with the test terminal grounded, the system should be diagnosed by an experienced driveability technician. If the light is OK, proceed as follows.
  4. The code(s) stored in memory may be read through counting the flashes of the dashboard warning lamp. The dash warning lamp should begin to flash Code 12. The code will display as one flash, a pause and two flashes. Code 12 is not a fault code. It is used as a system acknowledgment or handshake code; its presence indicates that the ECM can communicate as requested. Code 12 is used to begin every diagnostic sequence. Some vehicles also use Code 12 after all diagnostic codes have been sent.
  5. After Code 12 has been transmitted 3 times, the fault codes, if any, will each be transmitted 3 times. The codes are stored and transmitted in numeric order from lowest to highest.

The order of codes in the memory does not indicate the order of occurrence.
  1. If there are no codes stored, but a driveability or emissions problem is evident, the system should be diagnosed by an experienced driveability technician.
  2. If one or more codes are stored, record them. Refer to the applicable Diagnostic Code chart in this section.
  3. Switch the ignition OFF when finished with code retrieval or scan tool readings.

After making repairs, clear the trouble codes and operate the vehicle to see if it will reset, indicating further problems.

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2 Answers

Where is the computer test plug in


ALDL connector located under the dash on the driver side. you can insert jumper wire from terminal B diagnostic test terminal to terminal A ground of ALDL connector.the service engine light will flash trouble codes if you dont have obd 1 scanner.you will need engine code manual to look up your codes.

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3 Answers

Aldl obd1


The jumper set should be the upper top right 2 pins. Sometimes the outside of the pin can be broken, however if you place your jumper ( I've even just used a paper clip) inside both terminals, it should give you a response. Make sure your jumper is placed firmly inside of both terminals, then turn your key.

Mar 31, 2010 | 1995 Pontiac Grand Prix

1 Answer

Want to check for trouble codes, can't find the ALDL connector, suposed to be RH of drivers feet area I am told.


Hello veloruss: My name is Roger and I will try to answer your question so you can locate the terminal. You will find the ALDL connector on the right side of the drivers dash in the area of the gas pedal. Locate the white 3 wire connector. you will also see a green 3 wire connector with a single wire connector. Make sure you use the white 3 wire connector.Jump wires 1 and 3 together to obtain the computer codes. Should you need further help please just ask. Please rate the quality of the answer. This way I know the answer was correct. Thank You for using Fix Ya. Roger

Oct 08, 2009 | 1993 Isuzu Trooper

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