Gxt Ferret 91 2-Channel Labscope Manuel d'utilisateur télécharger pdf (Page 13)

Sensor Tests

Analog MAF Hot Wire

Connect COM probe to the sensor’s ground circuit, engine

block, or negative battery post. Connect CH1 probe to

the sensor’s signal circuit to the PCM. Crank or start the

engine, let the engine idle, rev the engine, or drive the

vehicle to make the driveability or emissions problem

occur. Check the waveform for proper amplitude at any

given air flow rate.

Analog MAF Vane Type

Connect COM probe to the sensor’s ground circuit, engine

block, or negative battery post. Connect CH1 probe to

the sensor’s signal circuit to the PCM. Crank or start the

engine, let the engine idle, rev the engine, or drive the

vehicle to make the driveability or emissions problem

occur. Check the waveform for proper frequency, shape,

and amplitude at any given air flow rate.

Digital MAF

Connect COM probe to the sensor’s ground circuit, engine

block, or negative battery post. Connect CH1 probe to

the sensor’s signal circuit to the PCM. Crank or start the

engine, let the engine idle, rev the engine, or drive the

vehicle to make the driveability or emissions problem

occur. Check the waveform for proper amplitude at any

given air flow rate.

EGR Valve Pos EVP

Connect COM probe to the sensor’s ground circuit, engine

block, or negative battery post. Connect CH1 probe to

the sensor’s signal circuit to the PCM. Crank or start the

engine, let the engine idle, rev the engine, or drive the

vehicle to make the driveability or emissions problem

occur. Check the waveform for proper amplitude at any

given EGR flow rate.

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Gxt Ferret 91 2-Channel Labscope Manuel d'utilisateur Page 13