Equus 3123 - GM Code Reader (1982 - 1995) Manual de usuario descargar pdf (Pagina 17)

Retrieving ECM Codes

GM 2-8

CODE SERVICE CODE DEFINITION

24 Vehicle speed sensor (VSS) - open or short circuit

problems or park/neutral switch circuit problem

25 Manifold air temperature (MAT) sensor - signal voltage

is low or high

Vacuum switching valve circuit open or shorted to

ground

ATS sensor - signal voltage is high or low

26 Quad-Driver module or Quad-driver No. 1 error

27 2nd gear switch problem

Quad-Driver module or Quad-driver No. 2 error

28 3rd gear switch

Quad-Driver module or Quad-driver No. 3 error

(Corvette)

(Transmission) Fluid pressure switch assembly - open or

short circuit problems

29 4th gear switch

Quad-Driver module or Quad-driver No. 3 error

Secondary air injection system - circuit problems

31 Manifold absolute pressure (MAP) sensor - signal

voltage is low

Fuel injector

Park/Neutral switch - circuit problems

CAM sensor - circuit problems

Engine speed control governor malfunction (Van)

Turbocharger wastegate overboost

Wastegate electrical signal - open or shorted to ground

Purge solenoid voltage high (carburetor engines)

32 Barometric pressure (BARO) sensor circuit failure

Exhaust gas recirculation (EGR) valve diagnostic switch -

closed during engine start-up or open when EGR flow

requested by ECM

Electronic vacuum regulator valve (EVRV) error (EVRV

controls EGR vacuum)

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 51 52

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Equus 3123 - GM Code Reader (1982 - 1995) Manual de usuario Pagina 17