OTC Wireless switch/hub - Manual (Page 71)

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Basic Special Test Procedure
ABS / Air Bag 2004 User Guide Chapter 10: Special Tests
10: Special Tests
The Special Tests function lets you perform special
bi-directional diagnostic tests on anti-lock brake sys-
tems (ABS) and air bags. The tests let you use the
NGIS tool to activate or control the system
components.
Note: During a test, you use the tool to temporarily control a
selected component. When you exit the test, the component
returns to the normal setting.
This chapter includes a basic procedure for doing the
special tests, brief descriptions of the special tests, and
examples of common special test screens.
Note: While performing a special test, a Fault Code Detected
screen may appear indicating a fault exists. Repair the prob-
lem and clear the diagnostic test code(s) before continuing
the special test. For details about clearing codes, refer to
“
Chapter 5: Diagnostic Codes (Read / Clear Codes) ”.
Note: The ABS Air Bag 2004 software has an automatic
Diagnostic Code Triggered Record function. If a diagnostic
fault occurs while you are testing a vehicle, the software auto-
matically alerts you with a screen message and creates a
recording for playback. To replay these recordings, refer to
“
Playback a Data File ” on page 21 .
WARNING:
Before performing any tests, refer to the Safety Pre-
cautions and instructions provided in this User
Guide and the warnings provided by the vehicle
manufacturer. In addition, follow any warnings and
descriptions provided on the NGIS tool screens.
WARNING:
During active testing, bi-directional component
activation is automatically “inhibited” when
required to allow brake components adequate time
to cool down. Do not bypass this cool-down period
by restarting the test or by using any other means
of bypassing the cool-down period.
Basic Special Test Procedure
The special tests vary for each vehicle, year, and
component (ABS, Air Bag, etc.). This section provides
basic steps for the special tests.
To perform special tests on a vehicle, follow these
steps:
1 Perform the steps in “ Chapter 2: Start-up Steps ” to enter
the vehicle information and display the Diagnostic Menu
screen.
Figure 10.1: Diagnostic Menu Screen
2 From the Diagnostic Menu screen, select Special Tests.
This displays the Special Tests menu screen (
Figure 10.2
on page 62 ).
Note: If an identification screen appears, review the
screen and press the ENTER key to display the Special
Tests menu screen.