Bendix Commercial Vehicle Systems VORAD VS-400 INSTALLATION NOTES - Manual (Page 27)

General Information
25
Diagnostic Trouble Code (DTC)
Isolation Procedures
Component Code: 32
(SA 140, SPN 639, FMI 2)
DIU J1939 Message Error
Overview
This code indicates that the Driver Interface Unit (DIU) has detected gaps or missing messages from the Forward Looking Radar (FLR) on
the J1939 data link .
Diagnostic Trouble Code (DTC) Detection
At power up and during operation, the DIU and FLR continuously communicate with each other on the J1939 data link . If the DIU detects
gaps occurring in the messages from the FLR or the FLR stops communicating, the Diagnostic Trouble Code (DTC) is set .
Symptom
The Bendix ™ VORAD ® VS-400 Collision Warning and the Bendix ™ SmartCruise ® adaptive cruise control will fail to operate and the orange
DTC light on the Driver Interface Unit will be illuminated . If SmartCruise ® adaptive cruise control is enabled, the vehicle’s cruise control may
not operate while this Diagnostic Trouble Code (DTC) is active .
Possible Causes
• Loose, corroded, or open J1939 data link connections
• Missing J1939 data link terminating resistor(s)
• Loss of power supply to the FLR
• Malfunctioning FLR
Repair Procedure
Active Diagnostic Trouble Code (DTC) Steps to Perform
Code 32, FMI 2 1 . Perform the "Component Power Supply Test" in the Appendix .
2 . Check the vehicle’s J1939 data link for poor connections or missing
terminating resistors .
3 . Verify that all ECU's on the data link are functional and not interfering with data link
communications .
Note: Isolate any suspect malfunctioning ECU’s by disconnecting
them from the data link .
4 . Perform Electrical Pretest to check data link and harness connections and harness to
the VS-400 components .
5 . If the Diagnostic Trouble Code (DTC) remains active with no Diagnostic Trouble Code
(DTC) found, replace the FLR and check operation .
6 . Test Complete .