Mitsubishi Galant/Mirage/Diamante 1990-2000

Reading Codes

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Fig. Diagnosis terminal connector location-Galant



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Fig. Diagnostic connector location-Mirage

Remember that the diagnostic trouble code identification refers only to the circuit, not necessarily to a specific component. For example, fault code 14 may indicate an error in the throttle position sensor circuit; it does not necessarily mean the TPS sensor has failed. Testing of all related wiring, connectors and the sensor itself may be required to locate the problem.

The PCM memory is capable of storing multiple codes. During diagnosis the codes will be transmitted in numerical order from lowest to highest, regardless of the order of occurrence. If multiple codes are stored, always begin diagnostic work with the lowest numbered code.

Make a note of the following:

  1. When battery voltage is low, no detection of failure is possible. Be sure to check the battery voltage and other conditions before starting the test.
  2.  
  3. Diagnostic items are erased if the battery or the engine controller connection is detached. Do not disconnect either of these components until the diagnostic material present in the PCM has been read completely.
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  5. Be sure to attach and detach the scan tool to the data link connector with the ignition key OFF . If the scan tool in connected or disconnected with the ignition key ON , diagnostic trouble codes may be falsely stored and the engine warning light may be illuminated.
  6.  

WITH A SCAN TOOL



The procedure listed below is to be used only as a guide, when using Mitsubishi's MUT-II, or equivalent scan tool. For specific operating instructions, follow the directions supplied with the particular scan tool being used.

  1. Remove the underdash cover, if equipped. Attach the scan tool to the data link connector, located on the left underside of the instrument panel.
  2.  



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Fig. The data link connector is located on the left under side of the instrument panel



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Fig. Proper connection of the scan tool to read codes on OBD-I vehicles

  1. Using the scan tool, read and record the on-board diagnostic output.
  2.  
  3. Diagnose and repair the faulty components as required.
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  5. Turn the ignition switch OFF and then turn it ON .
  6.  
  7. Erase the diagnostic trouble code.
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  9. Recheck the diagnostic trouble code and make sure that the normal code is output.
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WITHOUT A SCAN TOOL



  1. Remove the under dash cover, if equipped.
  2.  
  3. Attach an analog voltmeter between the on-board diagnostic output terminal of the data link connector and the ground terminal.
  4.  



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Fig. Location of the On-Board Diagnostic (OBD) output and ground terminal locations on the data link connector

  1. Turn the ignition switch ON .
  2.  
  3. Read the on-board diagnostic output pattern from the voltmeter and record.
  4.  
  5. Diagnose and repair the faulty components as required.
  6.  
  7. Erase the trouble code.
  8.  
  9. Turn the ignition switch ON , and read the diagnostic trouble codes, checking that a normal code is output.
  10.  

 
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