BENDIX BW2849 manual Step B, Key off Disconnect negative battery cable, Measure resistance

Page 14

Fault Isolation Procedures

Electrical Pretest, continued

Step B	Procedure	Condition	Action

1.Key off.

2.Disconnect negative (-) battery cable.

3.Disconnect 32-way connector from Central Processing Unit.

4. Measure resistance		If resistance is 0 to .5 ohms		Go to Step C.
between 32-way
between 32-way
connector pin C-2 and
ground.

If resistance is outside of range

Repair ground path for Bendix™ VORAD® system. Go to Step A.

DC

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15 16

	OHMS
V	COM	A

GROUND

2-3

Image 14

Contents Troubleshooting Guide Suggested Tools Fault Isolation ProceduresGeneral Warnings Related PublicationsPretests Symptom TestsIntroduction Component and System CodesDiagnostic Procedure YESFault Code Retrieval and Clearing Service ProcedureFault Code Isolation Procedure Index Fault Hand-Held CodesDriving Techniques On. Apply Service Brake For Minimum Seconds. If Right Turn Signal System Key on. If the fault is present,Heat and vibration Brake Input Signal System Speed Input Signal SystemSeconds to set this fault Description Type of Code Driving Technique 250Symptom-Driving Index Fault Isolation Procedures Service Procedure Electrical Pretest OverviewStep a Electrical PretestMeasure resistance Key off Disconnect negative battery cableStep B Step C Central Power-Up Sequence TestCentral Processing Unit Driver Display Unit Vehicle Harness DriverIf lights turn on and stay on Power-Up Sequence TestKey on Observe the Driver If lights turn on the go off Freightliner IDI Measure voltage If voltage is betweenMeasure resistance between If any of the above conditions are not met Go to Step DIf any of the above conditions are not met Go to Step E Step DKey off Measure resistance between Step E If any of the above conditions are not met Go to Step FStep F If any of the above conditions are not met Go to Step GAntenna 4-way connector Step GStep H Are not met StepMeasure resistance between Central Processing Go to Step JStep J Step K Key on Check error codes If no error codesIf error codes Go to Step LIf error codes Go to Step a Find error in testing Step LCheck for Codes. See If no codes Test complete Key off Reconnect all connectors Key onCompatibility problem Contact your Bendix Representative Clearing on If code appearsThis page left blank intentionally Basic Hand Tools Troubleshooting Guide Component Code 11 SID 254, FMI 4 Central Processing Unit CPUIf code 11 is inactive Test complete Code 11, 12 SID 254, FMI 4, 12, Central Processing Unit CPUKey off Retrieve codes If code 11 is active This fault causes a failure of the Bendix Vorad system Component Code 13 SID 9, FMI 2, 4, 5 Driver Display UnitIf voltage is 7.0 to 7.5 volts Code 13, 34 SID 9, FMI 2, 4, 5, 12 Driver Display UnitAvailable, go to Step B Go to Step Driver Display Unit 4-wayStep C 5,12 Key off Measure resistance between Central ProcessingStep E Repair OEM wiring harness Unit. Go to Step Clearing on page 1 If code 13 or 34 appears TestingAppears Procedure Index on If code other than 13 orComponent Code 14 SID 1, 2, FMI 2, 12 Antenna Assembly Pin 3 and pin If voltage is outside of range Key off Unplug the Antenna 4-way connector Key onCode 14, 35 SID 1, 2, FMI 2, 12, 14 Antenna Step C Step D Step E Step F Go to Step See Fault Code Isolation Clearing on page 1 If code 14 appearsComponent Code SID 10, FMI Right Side Sensor Code 15 SID 10, FMI 2 Right Side Sensor Key on Measure voltage between Pins a and B Pins a and CIf voltage between pins a Right Side Sensor?If resistance is outside of range Go to Step D Measure resistance between Way pin C13 and 3-way pin B If resistance is outside of range Go to Step EReplace Central processing Unit. Go to Step See Fault Code Isolation Procedure Index on page 1 Component Code SID 11, FMI Left Side Sensor Code 16 SID 11, FMI 2 Left Side Sensor Left Side Sensor?If resistance is out of range Go to Step D Measure resistance between Way pin D13 and 3-way pin B If resistance is out of range Go to Step EIf resistance is out of range Clearing on page 1 If code 16 appears Index on page 1Component Code SID 7, FMI Right Turn Signal Right Central Processing Unit Turn SignalIf equipped with a Right Side Sensor Code 21 SID 7, FMI 2 Right Turn SignalRepair OEM wiring harness as Required. Go to StepIf voltage ﬂashes within Key off Turn on right turn signalVolts of battery voltage If code other than 21 appears Component Code SID 8, FMI Left Turn Signal LeftCode 22 SID 8, FMI 2 Left Turn Signal Key off Turn on left turn signal If voltage measures withinIf code other than 22 appears Component Code SID 3, FMI Brake Input Error This fault causes a failure of the Vorad systemWorking correctly Go to Step Code 23 SID 3, FMI 2 Brake Input ErrorGo to Step B If the brake lights are not Proper conﬁgurationCheck pin C9 on 32-way If there is a wire in C9 Connector If there is not a wire in C9Key off Depress brake pedal Check for Codes. See If no codes appear Test complete Clearing on page 1 If code 23 appearsThis page left blank intentionally Component Code SID 6, FMI Speed Input Error If vehicle uses J-1939 or 1587 conﬁguration Code 24 SID 6, FMI 2 Speed Input ErrorUnit 32-way connector Have pins in C10 and C11 Ohms Between speed sensor Pins a and B10K ohms or open circuit Clearing on page 1 If code 24 appears Resistor Component Code 25 SID 231, FMI 2, 12 Cruise Signal ErrorTerminating Way pin D7 and ground If resistance is outside of range Go to Step BSee Engine OEM for PIN Location See Engine OEM For PIN Location Key off Measure resistance Key off Reconnect engine ECU connector Key on If error codes Problem exists with Engine ECU. RepairIf code other than 25 appears This page left blank intentionally Component Code SID 250, FMI Data Link Error Code 31 SID 250, FMI 2 J-1587 Data Link Error If resistance is outside of range Go to Step C Key on If no communication errors If communication errorsIf code other than 31 appears This page left blank intentionally Component Code SID 248, FMI Vbus Error Code 33 SID 248, FMI 12 Vbus Error If any of the above conditions are not met Go to Step BIf any of the above conditions are not met Go to Step C Connector pin D5 Driver DisplayStep D On page 1 Clearing on page 1 If code 33 appearsSymptom Isolation Procedures Antenna Not Detecting TargetsAppropriate isolation Properly Go to Step a Procedure Side Sensor Not Detecting Targets Side Sensor Detection Test Go to Step D If voltage is outside of range Between pins 2Key on Measure voltage Way pin C16 Ground Measure resistance between Way pin C164-way pin Replace Side Sensor Display. Go to Step Go to Step EGo to Step Go to Step F Key off Measure resistance between Way pin C14Way pin C14 Ground Ground is more than Key off Measure resistance between Way pin C12Way pin C12 Ground If resistance is outsideStep Detection Test New Driver Card There is no fallback mode for this symptomDriver Card Not Reading Driver Card Detection Test Bendix Vorad System Wiring Diagram AppendixWiring Diagram EatonvoradFault Code Tree Nvram