Introduction; Select Diagnostic Connector; Diagnostic Socket Location; Pin Definitions - Launch X-431 Manual

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Introduction

X-431 is the most advanced automobile
diagnostic unit in the world at present. Please
refer to X-431 User's Manual for its features,
hardware configuration, printer operation,
button description, conditions for test, etc.
Here we describe the operation procedure for
American Ford diagnostic program.

Select Diagnostic Connector

One of the following two types of diagnostic
socket may be equipped in the Ford vehicle:
OBDII-16PIN and Ford 6+1PIN.
Select [Smart OBDII] diagnostic connector for
vehicles equipped with OBDII-16PIN diagnostic
socket; and select [Ford 6+1PIN] diagnostic
connector for vehicles equipped with Ford
6+1PIN diagnostic socket.

Diagnostic Socket Location

The OBDII-16PIN diagnostic socket is usually
located in the cab under the instrument panel,
but the location may vary for different vehicle
type.
The Ford 6+1PIN Diagnostic Socket is usually
in the engine compartment.

Pin Definitions

OBDII-16PIN Diagnostic Socket
The OBDII-16PIN diagnostic socket is as shown in
Figure 01.
Figure 01
PIN definition of 16PIN OBDII diagnostic socket
PIN Definition
1 Manufacturer's discretion
X-431 American Ford Diagnosis
2 SAE J1850 Line (Bus +)
3 Manufacturer's discretion
4 Chassis Ground
5 Signal Ground
6 Manufacturer's discretion
7 ISO 9141 K Line
8 Manufacturer's discretion
9 Manufacturer's discretion
10 SAE J1850 Line (Bus -)
11 Manufacturer's discretion
12 Manufacturer's discretion
13 Manufacturer's discretion
14 Manufacturer's discretion
15 ISO 9141 L Line
16 Vehicle Battery Positive
Ford 6+1PIN Diagnostic Socket
The Ford 6+1PIN Diagnostic Socket is as
shown in Figure 02.
Figure 02
PIN definition of Ford 6+1PIN diagnostic socket
PIN
1 Not used
2 Not used
3 Communication line
4 Chassis ground
5 ABS diagnostic trigger
6 Not used
7 PCM diagnostic trigger

Connection

Refer to Figure 03 for connecting OBDII-16PIN
diagnostic connector
diagnosis.
1
Definition
before performing