Mazda Training manual — part 180

TC001-18-01H

INTRODUCTION TO M-MDS
SG00 - General

SG00 Page- 3

Timetable

Day 1

Time

Session

Remarks

8:30 – 9:00

Introductions

9:00 – 10:20

M-MDS Components

PDA Owners Manual must be
available

10:20 – 10:30

Morning Break

10:30 – 11:50

M-MDA Activities

12:00 – 13:00

Lunch

13:00 – 14:50

M-MDA Activities

14:50 – 15:00

Afternoon Break

15:00 – 17:00

M-MDA Activities

Day 2

Time

Session

Remarks

8:30 – 9:00

Review Day 1

9:00 – 10:20

M-MDA Activities

10:20 – 10:30 Morning Break

10:30 – 11:50 Introduction to IDS

12:00 – 13:00 Lunch

13:00 – 14:50 IDS Activities

14:50 – 15:00 Afternoon Break

15:00 – 17:00 IDS Activities/Evaluation

This schedule is subject to change when necessary.

TC001-18-01H

INTRODUCTION TO M-MDS
SG01 - Introduction

SG01 Page- 1

IDS Components

PDS Components

M-MDS Components

M-MDS consists of new hardware and software to communicate with the vehicle’s
control modules via the Data Link Connector (DLC).

There are two diagnostic systems within M-MDS.

•

Integrated Diagnostic Software (IDS)

•

Portable Diagnostic Software (PDS)

Like WDS, both systems get updates via DVD every 6 to 8 weeks. In addition, both
systems get daily updates from the internet. These updates are similar to the
updates previously downloaded from ESI.

IDS uses a Mazda-approved laptop computer, a Vehicle Communication Module
(VCM), several cables, and IDS software.

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PDS uses a Mazda-approved Personal Digital Assistant (PDA), the same VCM as
IDS, several cables, ActiveSync, and PDS software. PDS also requires a host PC to
get data into and out of the PDA.

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NOTE

Mazda PDS uses a PDA. In this class and in Mazda Service Information, the
PDA acronym is the same as Pocket PC (P-PC). M-MDS uses a PDA/Pocket PC
with Windows Mobile 2003 SE software. M-MDS will not run on a Palm Pilot.

Mazda PDS consists of two pieces of software, Portable Diagnostic Software (PDS)
and Portable File Manager (PFM). Together, this software is referred to as Portable
Diagnostic System (PDS).

TC001-18-01H

INTRODUCTION TO M-MDS
SG01 - Introduction

SG01 Page- 2

Vehicle Diagnostic System

All modules in vehicles with scan tool diagnostics connect to the DLC via one of
several communication methods:
These are the different forms of communication the scan tool must be able to
understand to communicate with the vehicle. These are:

•

ISO1941“K” line

•

J1850 SCP

•

ISO 11898 CAN

ISO 1941, also known as “K” line, is a single wire from the module to the DLC and
then to the scan tool. The only communication on the “K” line is module to scan tool.
The only diagnostic functions available are DTC retrieval, Data logger, and limited
programming ability. There is only one “K” line (single wire) in the DLC

J1850, also known as Standard Corporate Protocol (SCP), is a 2-wire system (Bus
+ and Bus -) allowing module to module communication. It also goes to the DLC to
allow communication with the scan tool. With SCP, the scan tool can retrieve DTC(s),
access data logger PID(s), and program/reprogram the modules. When connected,
the scan tool becomes another module on the SCP bus lines. There is only one Bus
+ and one Bus – in the DLC

ISO 11898 CAN (Controller Area Network) is a two-wire system (CAN + and CAN -)
that allows module-to-module communication. CAN also connects to the DLC to
allow communication with the scan tool. Like SCP, the scan tool becomes another
module on the network. With CAN, the scan tool can retrieve DTC(s), access data
logger PID(s), and program/reprogram modules. When connected, the scan tool
becomes another module on the CAN network(s). Currently there can be up to two
CAN networks on Mazda vehicles: High speed CAN (HS CAN, DLC pins 6 and 14)
and medium speed (MS CAN, DLC pins 3 and 11). All current Mazda’s have HS
CAN. MS CAN depends on the vehicle’s options or module content:

• HS CAN communicates at 500K per second

• MS CAN communicates at 125K per second.

Now let’s talk about information flow to the scan tool, starting at the DLC.

When you plug the data cable into the DLC, information goes to the VCM in
Controller Area Network, Standard Corporate Protocol, or “K” line. The VCM converts
this data into Universal Serial Bus (USB). Data in this format is then sent to the
laptop (IDS) or PDA (PDS).

NOTE

“Universal Serial Bus” is an external bus standard that supports data transfer rates
of 12 Mbps. A single USB port can be used to connect up to 127 peripheral
devices, such as a mouse, modems, and keyboards. USB also supports plug-and-
play installation and hot plugging. (Source: www.webopedia.com).

TC001-18-01H

INTRODUCTION TO M-MDS
SG01 - Introduction

SG01 Page- 3

Vehicle Diagnostic System
(Cont’d)

The laptop or PDA then converts this data into text or images (i.e., graphics) for us to
use when diagnosing the vehicle.

IDS is very similar to WDS, using the same icons and functions to operate it. The
only difference to the operator is that the Mazda-approved laptop is not “touch
screen” like the WDS Portable Test Unit. This means you have to use the keyboard
and mouse or scratch pad.

Since you are already familiar with WDS, this class deals primarily with PDS. Let’s
get started with PDS activities.