Launch X-431 PAD User Manual - 3 How to Diagnose

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                                                              X-431 PAD User's Manual

3 How to diagnose

3.1 Preparation and Connections

3.1.1 Preparation

Normal testing conditions

1. 

Turn on the vehicle power supply.

• 

Vehicle battery voltage range should be 11-14V and working voltage of X-431 

• 

PAD is 12V. 

Throttle should be closed at its close position. 

• 

Ignition  timing  and  idle  speed  should  be  within  specified  range;  water 

• 

and transmission oil temperature are within normal working range (water 

temperature is 90-110℃ and transmission oil temperature is 50-80℃). 

Select testing connectors

2. 

If  X-431  PAD  is  testing  vehicles  equipped  with  universal  OBD  II  16  PIN 

diagnostic socket, please use the included DBScar diagnostic connector. (For 

vehicles with non-OBD II 16 PIN diagnostic socket, a non-16 PIN connector is 

required.)

3.1.2 Connecting X-431 PAD

Follow the steps described as below to connect X-431 PAD:

Locate vehicle’s DLC socket: it provides standard 16 pins and is generally 

1. 

located on driver’s side, about 12 inch away from the center of dashboard.

See the following figure. If DLC is not equipped under dashboard, an label 

indicating its position will be given. In case no DLC is found, please refer to 

Automobile Repair Manual.

Near the center

of dashboard