BENDIX BW2771 User Manual download pdf (Page 9)

Product Safety Information

Pretest Procedures

Retrieving Diagnostic Trouble Codes (DTCs)

Overview

This section determines if the Driver Interface Unit (DIU) and the Forward Looking Radar (FLR) are both communicating on the vehicle’s

J1939 data link and if either component has set any Diagnostic Trouble Codes (DTCs). In order for the system to operate properly, the DIU

and the FLR must be able to communicate with each other, as well as other ECU’s on the vehicle’s J1939 data link.

Note: This procedure requires an approved PR1210A communications adapter that supports J1939 communications.

Detecting Components

Connect the service PC to the vehicle’s 9-pin J1939 diagnostic port connector with an approved RP1210A communications adapter. Start

the diagnostic program and verify that a connection has been established with the vehicle’s J1939 data link.

View the Vehicle Components screen and verify that the VORAD

VS-400 Forward Looking Radar (source address 42) and the Driver

Interface Unit (source address 140) are being detected.

Data Link Source Address ECU Description

J1939 42 Forward Looking Radar

J1939 140 Driver Interface Unit

 • IftheDIUortheFLRarenotbeingdetected,proceedtotheElectricalPretestproceduretocheckforpowertotheVS-400

system components and that all components are properly connected to the vehicle’s J1939 data link.

Viewing Diagnostic Trouble Codes (DTCs)

View the Vehicle Diagnostic Trouble Codes (DTCs) screen in the diagnostic software and verify if the Forward Looking Radar or the Driver

Interface Unit have set any Active or Inactive codes.

 • IfanActiveVS-400codeispresent,recordthevehicleDiagnosticTroubleCode(DTC)informationandproceedtoDiagnostic

Procedure in this manual for the Active code for more information. Do not clear any codes at this time.

 • IfonlyInactive(historic)VS-400codesarepresent,recordthevehicleDiagnosticTroubleCode(DTC)informationandclearall

historic Diagnostic Trouble Codes (DTCs). Road test the vehicle to verify proper operation of the VS-400 system.

Clearing Diagnostic Trouble Codes (DTCs)

After all repairs have been made and the system is functioning normally, clear all vehicle codes before placing the vehicle back into service.

To clear codes, connect the service PC to the vehicle and start diagnostic software. View the Vehicle Diagnostic Trouble Codes (DTCs)

screen and select Clear All. Refresh the screen to verify all historic codes have been cleared and that no Active codes are present.

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BENDIX BW2771 User Manual Page 9