If your car does not have the 12 pin DLC connector, you may not be able to manually "flash" your trouble codes. The language "may be possible" appears to suggest that this method should work with most, if not all, 12 pin DLC equipped cars.

THE CONNECTOR

   -----------------------
   | 1  2  3   4   5   6 |
   | 7  8  9  10  11  12 |
   -----------------------

 

DISPLAYING THE TROUBLE CODES
Run a wire/hairpin from Pin 5 to Pin 6 with the ignition off, then turning the ignition to the on position without starting the engine will flash the "Service Engine Soon" light in the following sequence: flash, pause, flash-flash, long pause flash, pause, flash-flash, long pause flash, pause, flash-flash, long pause Following this "12" code repeating three times will come any trouble codes stored, flashing each of them three times. If you do not see the "12" flash three times, your diagnostic circuit is defective.

Some vehicles will display stored trouble codes, then "12" again, followed by energizing "most system controlled relays." The fuel pump relay will not energize. The idle air control valve will fully extend to enable checking minimum idle speed.

CLEARING THE TROUBLE CODES
Turn the keyswitch to the off position. To clear any trouble codes, disconnect the power feed for 30 seconds. If this is done at the battery, and your car stereo is equipped and programmed with a four digit pin code, you may have to re-enter that as well to use your stereo again. A better place to remove power is at the fuse.

TROUBLE CODES

   12. No reference pulses to Electronic Control Module
	(ECM). 
  



 13. Oxygen sensor signal stays lean during warm engine
	cruise 
  



 14. High temperature indicated at engine coolant temp.
	sensor 
  



 15. Low temperature indicated at engine coolant temp. sensor 
  



 16. High battery voltage OR 
       Direct inition system open or shorted to ground 
   



17. RPM signal problem 
   



18-20. N/A 
  



21. High voltage at throttle positon sensor 
   



22. Low voltage at throttle positon sensor OR 
	 Fuel cutoff relay circuit open or shorted to ground 




   23. Low temperature at manifold air temperature sensor
	   OR 
       Throttle position sensor error 




   24. Circuit fault in vehicle speed sensor 




   25. High temperature at manifold air temperature sensor
	   OR 
       Vacuum switching valve circuit open or shorted to ground
	   OR 
       High voltage at ATS sensor 




   26. Fault in quad driver module 




   27. Fault in 2nd gear switch 




   28. Fault in 3rd gear switch 




   29. Fault in 4th gear switch 




   30. N/A 




   31. Low voltage at manifold absolute pressure sensor
       OR 
       Fuel injector OR 
       Park or neutral switch OR 
       CAM diagnostic OR 
       Governor malfunction OR 
       Wastegate overboost OR 
       Wastegate eletrical signal open or shorted to ground 




   32. Fault in barometric pressure sensor circuit OR 
       Fault in exhaust gas recirculation valve diagnostic switch
	   OR 
       Fault in electronic vacuum regulator valve 




   33. High voltage (low vacuum or low flow) at mass air flow sensor
	(or MAP sensor)



   34. Low voltage (high vacuum or high flow) at mass air flow sensor
	(or MAP sensor)



   35. Idle speed can not be set to desired RPM 




   36. Burn off at mass air flow sensor OR 
       Problem in transmission shift OR 
       Fault in direct ignition system OR 
       Missing pulses in electronic spark timing signal 




   37. N/A 




   38. Fault in torque converter clutch brake switch 




   39. Fault in torque converter clutch circuit 




   40. N/A 




   41. Fault at cam sensor OR 
       Cylinder select error OR 
       Tach input error 




   42. Fault at electronic spark timing circuit OR 
       Fault at direct ignition system OR 
       Fault at fuel cutoff relay circuit 




   43. Low voltage at electronic spark timing circuit 




   44. Oxygen sensor lean 




   45. Oxygen sensor rich 




   46. Fault at vehicle anti-theft sytem OR 
       Fault at power steering switch 




   47. Problem at Electronic Control Module (ECM) 




   48. Misfire 




   49. Vacuum leak 




   50. N/A 




   51. PROM error 




   52. Problem at Electronic Control Module (ECM) - 
       Missing fuel calpac missing OR 
       Analog to digital converter error OR 
       Fault at quad driver module OR 
       Low voltage at oil temperature sensor 




   53. High voltage at battery OR 
       High voltage at exhaust gas recirculation valve OR 
       Voltage reference error OR 
       Problem at vehicle anti-theft system 




   54. Low voltage at fuel pump OR 
       Low voltage at Fuel pump relay OR 
       Output failure at quad driver module 




   55. Problem at Electronic Control Module (ECM) - 
       ECM failure OR 
       Serial bus error OR 
       Fuel lean malfunction 




   56. Low coolant or corrosivity OR 
       Fault in port throttle system vacuum sensor 




   57. N/A 




   58. Problem at vehicle anti-theft system 




   59-60. N/A 




   61. Oxygen sensor degraded OR 
       Port throttle system error OR 
       Cruise control problems 




   62. Gear switch input diagnostics OR 
       High voltage at oil temperature sensor OR 
       Fault in cruise control- vacuum solenoid circuit 




   63. High voltage at manifold absolute pressure sensor
OR 
       Fault in exhaust gas recirculation valve OR 
       Fault at right oxygen sensor 




   64. Low voltage at manifold absolute pressure sensor
OR 
       Fault in exhaust gas recirculation valve OR 
       Right oxygen sensor lean 




   65. Failure at exhaust gas recirculation valve OR 
       Faulure at injector peak/hold diagnostic OR 
       Right oxygen sensor rich OR 
       Fault at cruise control position sensor 




   66. Internal reset of Electronic Control Module (ECM) 




   67. Fault at cruise control switch 
   



68. Fault at cruise control switch 
   



69. Fault at air conditioner pressure switch 
   



70-87. N/A 
  



 88. Internal reset of Electronic Control Module (ECM)