Isuzu 1999 RODEO Workshop Manual page 1070

ILLUSTRATION
EVAP Pressure/Purge
Ultrasonic Leak Detector
RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
TOOL NO.
TOOL NAME
J 28742–A
Weather Pack II
Terminal Remover
J 39021–90
Injector Switch Box
J 39021–45
Injector Test Light
J 41413!
Diagnostic Station
J 41416@
1. J 41413 EVAP Pressure/Purge Diagnostic Station is
a multipurpose tool which is used to perform several
diagnostic procedures for enhanced emission
testing. The station will accommodate a nitrogen gas
filled cylinder which is used to pressurize the vehicle
EVAP system for a leakdown test and leak location
test when a vehicle is repaired for leakage in the
enhanced evaporative emission control system. It
also has two additional gauges (inches of mercury
and inches of water) which are used to measure both
source vacuum and EVAP canister purge vacuum to
verify correct operation and vapor flow within the
canister purge circuit.
2. J 41416 Ultrasonic
microprocessor–based device used to detect leaks in
the enhanced evaporative emission control system.
The evaporative system is pressurized to 30 inches of
water using the J 41413 EVAP Pressure/Purge
Diagnostic System. Small leaks in the EVAP system
will emit sound at a high frequency undetectable by a
human ear but detectable with the J 41416. The
technician traces along the evaporative system and
can pinpoint leaks due to corroded lines, cracked
hoses, or a damaged EVAP component. The detector
includes a high quality set of headphones to block out
surrounding shop noise and the LED sensitivity meter
allows a visual reference for locating leaks in
conjunction with the audio output heard through the
headphones. Powered by (1) nine volt battery.
6E1–443
Leak Detector is a