Gxt V095-01 Automotive Analyzer Manuel d'utilisateur télécharger pdf (Page 16)

Coil Test - Fuel Injector Application

Peak Amps is the peak current driving

the injector. It is regulated by the driver.

Typical peak readings are from 1 to 4

amps for a current regulated injector

driver, and about 1 amp for a resistance

limited injector driver.

Build Time, is the time it takes the

amperage to reach its maximum. Build

Time is affected by the solenoid and pintle movement. Shorter

Build Time can be caused by a solenoid winding short or an injector

that is stuck. Longer build time could be from a bad driver or wire

connection.

Drive Time is the time the injector is actively driven. Use momentary

wide open throttle to see the Min and Max readings.

Analysis of Test Results

In general, a difference of 1 amp between injector banks on

resistance regulated injectors indicates that one or more injectors

is faulty in the bank with the higher amperage draw. In a current

regulated system, look for build time to be longer on the bank with

an open or high resistance injector. Build will be shorter on the

bank with a shorted injector.injector pattern.

BUILD

mSec

PEAK

AMPS

DRIVE

mSec

382

LOBAT

MAX

MIN

PEAK

AMPS

BLD

HOLD

REL 0

Peak Amps/Build Display

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Gxt V095-01 Automotive Analyzer Manuel d'utilisateur Page 16