Launch Creader CR-HD Heavy Duty (УТ000003163) [10/29] Launch cr hd user s manual

LAUNCH CR-HD User's Manual

1. INTRODUCTION

The CR-HD is specially developed by LAUNCH for heavy-duty vehicles, which

enables users to read DTCs, clear DTCs and view the datastream with a live

color graphing. It covers a wide range of vehicles since it offers multiple data

bus protocols, such as J1587 and J1939. It can be connected to PC through the

USB cable for upgrade to keep updated with the latest software version.

Notice: CR-HD may automatically reset while being disturbed by strong static

electricity. THIS IS A NORMAL REACTION.

2. General Information

2.1 About DTC

Diagnostic Trouble Codes (DTC) are codes that are stored by the on-board

computer diagnostic system in response to a problem found in the vehicle.

These codes identify a particular problem area and are intended to provide you

with a guide as to where a fault might be occurring within a vehicle. This section

explains the basic elements of fault codes for J1587/J1708 and J1939 data

bus protocols, how to view these codes on CR-HD, and what they mean. Each

fault code on CR-HD contains three distinct pieces of information, as described

below.

J1587/J1708 fault codes consist of the following, in this order:

Subsystem Identier (SID) – Indicates what function on the ECU has failed. •

Failure Mode Indicator (FMI) – Indicates in what way the function failed.•

Occurence (OC) – Indicates the occurence times of fault codes.•

J1939 fault codes consist of the following, in this order:

Suspect Parameter Number (SPN) – Indicates what function on the ECU has •

failed.

Failure Mode Indicator (FMI) – Indicates in what way the function failed.•

Occurence (OC) – Indicates the occurence times of fault codes.•

2.2 J1708/J1587/J1939

SAE J1708, SAE J1587 and SAE J1939 are automotive diagnostic protocol

standard developed by the Society of Automotive Engineers (SAE).