OTC Wireless switch/hub - Manual (Page 44)

34
Read Codes
ABS / Air Bag 2004 User Guide
Read Codes
The Diagnostic Codes, Read Codes option lets you use
the NGIS tool to read DTCs from a vehicle that allows
access to the vehicle’s electronic control unit (ECU)
through a data link connection (DLC).
Depending on the vehicle being tested, the Read
Codes procedure varies. This section includes two sep-
arate Read Codes procedures, as follows:
• Read and Display Codes (below) - this procedure reads
and displays the DTCs in one procedure.
• Read Codes Only ( page 35 )- this procedure only reads
the DTCs. You have to use the Review Codes procedure
(
page 37 ) to view codes after reading them with this
procedure.
Read and Display Codes
Use these steps to read and display DTCs for vehicles
that allow reading and displaying of codes in one
procedure.
Note: For vehicles that require reading of DTCs by visually
viewing them as “flash codes,” refer to “
Read Codes / Clear
Codes (Flash Codes) ” on page 42 .
To read and display DTC codes, follow these steps:
Note: Before performing this procedure, make sure the vehi-
cle’s ignition key is in the On (Run) position with the engine
off.
Figure 5.3: Diagnostic Menu Screen
1 From the Diagnostic Menu screen, select Diagnostic
Codes and press the ENTER key. This displays the Diag-
nostic Trouble Codes menu screen.
Figure 5.4: Diagnostic Trouble Codes Menu Screen
2 Select Read Codes and press the ENTER key. One of
the following happens:
• If the vehicle’s ECU stores current and history codes,
the Read Codes menu screen appears (see
Figure
5.5 ). Continue with the next step.
• If the vehicle’s ECU stores only current codes,
the DTC Information screen appears (see
Figure 5.6 ).
Go to Step 4.
Figure 5.5: Read Codes Menu Screen