Bendix Commercial Vehicle Systems VORAD VS-400 INSTALLATION NOTES - Manual (Page 30)

General Information
28
Diagnostic Trouble Code (DTC)
Isolation Procedures
Component Code: 39
(SA 42, SPN 158, FMI 3, 4)
FLR Supply Voltage Out of Range
Overview
This code indicates that the Forward Looking Radar (FLR) has determined that the supply voltage is, or was, out of range .
Diagnostic Trouble Code (DTC) Detection
At power up and during operation, the FLR monitors supply voltage . If the supply voltage fails outside the normal operating range (+9 to 16
Vdc) the Diagnostic Trouble Code (DTC) will set and the FLR will power down to prevent damage . In some cases the FLR may power down
before the Diagnostic Trouble Code (DTC) is set . This Diagnostic Trouble Code (DTC) may also trigger Driver Interface Diagnostic Trouble
Codes (DTCs) 32 and 35 for loss of J1939 messages . In this case correcting this condition should clear the other Diagnostic Trouble Codes
(DTCs) .
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
• FMI 3 - Supply voltage to the FLR is too low.
• FMI 4 - Supply voltage to the FLR is too high.
Repair Procedure
Active Diagnostic Trouble Code Steps to Perform
(DTC)
Code 39, FMI 3, 4 1 . Repair supply voltage to FLR . The FLR voltage should be 12 Vdc ignition power .
2 . Verify Diagnostic Trouble Code (DTC) condition has been cleared .
3 . Test Complete .