34ABS / Air Bag 2004 User Guide

Read Codes

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 5.4: Diagnostic Trouble Codes Menu Screen

2Select 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

Figure 5.3: Diagnostic Menu Screen

1From the Diagnostic Menu screen, select Diagnostic Codes and press the ENTER key. This displays the Diag- nostic Trouble Codes menu screen.

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OTC Wireless switch/hub manual Read Codes, Read and Display Codes, To read and display DTC codes, follow these steps

switch/hub specifications

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