Lite-Check INSPECTOR 920 User manual

INSPECTOR MODEL 920
OPERATIONS MANUAL
LITE-CHECK VEHICLE TESTER
FOR
AIR BRAKES, ELECTRICAL AND ABS
REV 2.0.3 – September 4, 2013

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Revision History:
Name Date Changes Version #
Gene Ambacher July 31, 2013 Initial Draft 2.0.3
Gene Ambacher September 4, 2013 Final Draft 2.0.3b

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Cautions
Block vehicle wheels from movement before releasing brakes
The antenna must be fully exposed for a clear radio signal
Do not arc weld while the tester is connected to the trailor. The tester is
grounded to the chassis and will be damaged.
Do not hook up electrical devices on the same trailer that the tester is
diagnosing. The tester needs a clean power supply.
Do not lengthen existing power cord on the tester. Attach the tester
power cord directly to a 12-volt battery or a regulated power supply.
Lengthening the power cord will cause a power drop.
Be aware of voltage spikes. The tester will only operate on regulated
power. Use a 12-volt battery or LITE-CHECK 311R Regulated Power
Supply.
Using a battery charger or power converter as a power source will
damage the tester. Do not charge a battery when the battery is
connected to the tester.
The tester will not operate efficiently
below 10.5 volts and will indicate “LOW
BATTERY” (LOW BAT) 
The tester may shut down below 9.0
volts
If operating gasoline motors near the tester, be sure that they have
static suppression on the engine. Static can cause radio interference.
The emergency air must be applied before the service brakes will
operate. This prevents brake compounding.

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Table of Contents
Cautions.........................................................................................................................3
Table of Contents..........................................................................................................4
Introduction ...................................................................................................................7
Summary.....................................................................................................................7
Key Features of the Inspector 920...............................................................................8
Overview........................................................................................................................9
INSPECTOR 920 Component Identification................................................................9
Keyboard Layout........................................................................................................10
Equipment and Setup .................................................................................................11
What is included with the LITE-CHECK INSPECTOR 920?......................................12
Required Materials.....................................................................................................12
LITE-CHECK INSPECTOR 920 Accessories ............................................................12
Set-Up Procedures....................................................................................................13
Reminders.................................................................................................................14
Operations ...................................................................................................................14
Reading the Digital Display........................................................................................14
7-Way Pin Numbers and Circuits...............................................................................16
Remote Control ...........................................................................................................16
Operation...................................................................................................................16
Power Supply ..............................................................................................................17
Power Supply Set Up:................................................................................................17
Low Battery Messages ..............................................................................................17
7-Way Cable Test.........................................................................................................18
Trailer Test Procedures..............................................................................................18
Air Brake Testing.........................................................................................................19
Inspecting for Trailer Electrical Faults......................................................................20

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Overview....................................................................................................................20
Electrical Testing .......................................................................................................20
Circuit Condition Messages.......................................................................................21
ABS Test Procedures..................................................................................................22
Initial Setup and Configuration...................................................................................22
Trailer ABS Power Supply Requirements..................................................................22
ABS Operation...........................................................................................................23
Main Menu.................................................................................................................24
Viewing Active Faults.................................................................................................24
Viewing Stored Faults................................................................................................25
Clearing Active and Stored Faults .............................................................................25
Mileage......................................................................................................................25
ECU Voltage..............................................................................................................25
Manufacturer’s Configuration.....................................................................................26
Serial Number............................................................................................................26
Special Functions ......................................................................................................26
Getting Help...............................................................................................................26
ABS Fault Identification and Troubleshooting............................................................27
Tractor Testing............................................................................................................27
Electrical Output Test ................................................................................................28
Battery/Alternator Test...............................................................................................28
Air Output Test ..........................................................................................................28
Appendix......................................................................................................................29
ABS Button Codes.....................................................................................................29
Definition of Terms.....................................................................................................32
Accessories...............................................................................................................33

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Warranty, Contact and Service Information..............................................................34
Shipping LITE-CHECK Products................................................................................34
Index.............................................................................................................................35

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LITE-CHECK INSPECTOR 920
Diagnostic Tester
Introduction
Summary
The LITE-CHECK INSPECTOR 920 Diagnostic Test system will perform vital
diagnostics of electrical and air systems on both tractors and trailers. The INSPECTOR
software puts trailer ABS inspection, fault identification and troubleshooting support at
the fingertips of inspectors and mechanics. The LITE-CHECK INSPECTOR 920
provides your facility with an efficient tool for safety assurance and maintenance of your
heavy-duty fleet.

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Key Features of the Inspector 920
Remote control operation of electrical and air systems
Dynamic monitoring of electrical faults
Microprocessor-driven simultaneous monitoring of all 7-way circuits
allows direct identification of circuit conditions including: shorts,
opens, open grounds, and chassis shorts
Digital display provides fault information at the tester. Unique audible
alarms assist in troubleshooting, and repair activities at various
locations around the trailer and tractor
Regulated “Service Air” for consistent brake application and inspection
Performs one-step, air-systems leak test with built-in 60 second timer
Automatic cable test
“One-Button ABS” feature with direct access to faults present in ABS
controllers
Built-in guidance for ABS fault resolution

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Overview
INSPECTOR 920 Component Identification
The LITE-CHECK INSPECTOR 920 has the following components.
Item Description
RC Antenna Antenna for use with remote control
Digital Display Displays messages on tester status and results
(see below)
Service Air Pressure Gauge Indicates service air pressure in PSI
Emergency Air Pressure Gauge Indicates emergency air pressure in PSI
Keyboard See section (below) on individual buttons
Alarm Speaker Speaker sounds different alarms for any test failure
Emergency Air Connector Port for connecting emergency air to the tester. 1/4”
air line with glad hand on one end needed.
Service Air Connector Port for connecting Service air to the tester. 1/4” air
line with glad hand on one end needed.

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Item Description
7-Way Cable Socket Cable socket for 7-way cable
7-Way Cable Socket (for testing) Cable socket for 7-way cable. (Used for cable
testing)
Keyboard Layout
The chart below provides a brief description of each button on the keyboard panel and
on the remote control.
Graphic Panel Button Remote Button Function
EMER.
EMER. EMER. Operates emergency air
SERVICE SERVICE Operates service air (if emergency Is
pressurized)
AIR LEAK
TEST AIR LEAK TEST Blocks air source for vehicle air leak test
BRAKE
BRAKE BRAKE Operates brake electrical circuit
MARKER MARKER Operates marker (clearance) circuit
AUXIL
AUXIL AUXIL Operates auxiliary circuit (ABS power)
LEFT LEFT Operates left turn circuit
TAIL TAIL Operates tail circuit