Equus 3123 - GM Code Reader (1982 - 1995) Manual do Utilizador descarregar pdf (Página 18)

2-9 GM

CODE SERVICE CODE DEFINITION

33 Mass air flow (MAF) sensor - signal voltage or frequency

is high during engine idle

Manifold absolute pressure (MAP) sensor - signal

voltage is high during engine idle (Note: Engine misfire

or unstable idle may cause this code)

34 Mass air flow (MAF) sensor - signal voltage or frequency

is low during engine cruise

Manifold absolute pressure (MAP) sensor - signal

voltage is low during ignition on

Pressure sensor circuit - signal voltage too high or low

(carburetor engines)

35 Idle air control (IAC) system problem - can not set

desired RPM or idle speed actuator (ISA) carbureted

system problems

36 Mass air flow (MAF) sensor - burn-off circuit problem

Transmission shift problem (electronically controlled

transmissions only)

Direct ignition system (DIS) fault - loss of 24X signal or

extra or missing pulses in electronic spark timing (EST)

signal

Ignition system fault - loss of High Resolution Pulse

signal

37 Brake switch stuck"on"

38 Brake switch circuit fault

Knock sensor (KS) - open circuit problem

39 Torque converter clutch (TCC circuit fault)

Clutch switch circuit problems

Knock sensor (KS) - short circuit problem

41 Cam sensor (CAM) failure

Cylinder select error

Tach input error - no reference pulses during engine run

Electronic spark timing (EST) circuit - open or shorted

to ground during engine run

Direct ignition system (DIS) fault - bypass circuit open

or shorted to ground during engine run

Ignition system fault - loss of 1X Reference Pulse signal

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Equus 3123 - GM Code Reader (1982 - 1995) Manual do Utilizador Página 18