If your vehicle is 1996 or newer, the Part Number listed in Which Personal Scan Tool Do I Order? for each vehicle manufacturer is the most typical one.  We have found there are exceptions and as new vehicles are released some manufacturers are changing the OBD II communication protocol they use.  To be sure that you are ordering the correct scan tool version, you need to look at the vehicle's diagnostic connector. 

obd2dlc.gif (4956 bytes)

(front view)

The diagnostic connector or DLC is a 16 pin connector that is located under the driver side dash of most vehicles. Locate the DLC and note which pins are used*.  (If you are unable to find the DLC, look in your vehicle's owners manual or call your local dealer).  Next consult the figures below to determine which OBD II communication protocol your vehicle uses to decide which Personal Scan Tool version to order.

*A pin (one of the 16 slots on the DLC) is considered used if there is a metal terminal in it.

NOTE:  Only the pins needed to determine the communication protocol are shown.  More pins may be used in your vehicle's DLC.     Also, all of the pins shown may not be required. Be sure to read each pin's description in the table under the figure.

 If you would like us to help you select which Scan Tool to order, send an e-mail to sales@obd2.com.


If your diagnostic connector uses the pins indicated below, your vehicle uses the OBD II ISO or KWP 2000 communication protocol.   Order the following part number:

Part #:  PER-ISO-01 Pricing

iso_dlc.gif (9437 bytes)

Pin # Description
4,5 Ground (your vehicle may use pin 4, pin 5 or both pins)
7 Data 
15 Data  (this pin may not be present)
16 Power

 


If your diagnostic connector uses the pins indicated below, your vehicle uses the OBD II PWM communication protocol.  Order the following part number:

Part #:  PER-PWM-01 Pricing

pwm_dlc.gif (9448 bytes)

 

Pin # Description
2 Data
4, 5 Ground (your vehicle may use pin 4, pin 5 or both pins)
10 Data 
16 Power

If your diagnostic connector uses the pins indicated below, your vehicle uses the OBD II VPW communication protocol.  Order the following part number:

Part #:  PER-VPW-01 Pricing

 

vpw_dlc.gif (9514 bytes)

 

Pin # Description
2 Data
4, 5 Ground (your vehicle may use pin 4, pin 5 or both pins)
16 Power

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Copyright 1997-2002 EASE Simulation, Inc. All rights reserved.
Information in this document is subject to change without notice.
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Revised: April 08, 2002.