BENDIX BW2849 manual Code 33 SID 248, FMI 12 Vbus Error

Page 93

Fault Isolation Procedures

Code 33 (SID 248, FMI 12) VBUS Error

Step A	Procedure	Condition	Action

Code (SID 245,

1.Key off.

2.Disconnect the Central Processing Unit 32-way connector.

3.Measure resistance between:

• Central Processing Unit 32-way connector pin C5 and Antenna 4-way connector pin 2.

•Central Processing Unit 32-way connector and pin C5 and ground.

If resistance between pin C5 and pin 2 is 0 to .3 ohms and if resistance between pin C5 and ground is more than 10K ohms or open circuit [OL]

If any of the above conditions are not met

Go to Step B.

Repair OEM wiring harness between Antenna and the Central Processing Unit. Go to Step V.

FMI	33
12)

DC

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15 16

	OHMS
V	COM	A

DC

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15 16

	OHMS
V	COM	A

GROUND

1	4
2	3

2-82

Image 93

Contents Troubleshooting Guide General Warnings Fault Isolation ProceduresSuggested Tools Related PublicationsIntroduction Symptom TestsPretests Component and System CodesYES Diagnostic ProcedureService Procedure Fault Code Retrieval and ClearingFault Hand-Held Codes Fault Code Isolation Procedure IndexDriving Techniques Heat and vibration Brake Input Signal System Right Turn Signal System Key on. If the fault is present,On. Apply Service Brake For Minimum Seconds. If Speed Input Signal SystemDescription Type of Code Driving Technique 250 Seconds to set this faultSymptom-Driving Index Fault Isolation Procedures Service Procedure Overview Electrical PretestElectrical Pretest Step aKey off Disconnect negative battery cable Step BMeasure resistance Step C Central Processing Unit Driver Display Unit Vehicle Harness Power-Up Sequence TestCentral DriverKey on Observe the Driver If lights turn on the go off Power-Up Sequence TestIf lights turn on and stay on Freightliner IDI Measure voltage If voltage is betweenIf any of the above conditions are not met Go to Step D Measure resistance betweenStep D Key off Measure resistance betweenIf any of the above conditions are not met Go to Step E If any of the above conditions are not met Go to Step F Step EIf any of the above conditions are not met Go to Step G Step FStep G Antenna 4-way connectorStep H Measure resistance between Central Processing StepAre not met Go to Step JStep J If error codes Key on Check error codes If no error codesStep K Go to Step LStep L If error codes Go to Step a Find error in testingCompatibility problem Contact your Bendix Representative Key off Reconnect all connectors Key onCheck for Codes. See If no codes Test complete Clearing on If code appearsThis page left blank intentionally Component Code 11 SID 254, FMI 4 Central Processing Unit CPU Basic Hand Tools Troubleshooting GuideCode 11, 12 SID 254, FMI 4, 12, Central Processing Unit CPU Key off Retrieve codes If code 11 is activeIf code 11 is inactive Test complete Component Code 13 SID 9, FMI 2, 4, 5 Driver Display Unit This fault causes a failure of the Bendix Vorad systemAvailable, go to Step B Go to Step Code 13, 34 SID 9, FMI 2, 4, 5, 12 Driver Display UnitIf voltage is 7.0 to 7.5 volts Driver Display Unit 4-wayStep C Key off Measure resistance between Central Processing 5,12Step E Repair OEM wiring harness Unit. Go to Step Appears Procedure Index on TestingClearing on page 1 If code 13 or 34 appears If code other than 13 orComponent Code 14 SID 1, 2, FMI 2, 12 Antenna Assembly Key off Unplug the Antenna 4-way connector Key on Code 14, 35 SID 1, 2, FMI 2, 12, 14 AntennaPin 3 and pin If voltage is outside of range Step C Step D Step E Step F Go to Step Clearing on page 1 If code 14 appears See Fault Code IsolationComponent Code SID 10, FMI Right Side Sensor If voltage between pins a Key on Measure voltage between Pins a and B Pins a and CCode 15 SID 10, FMI 2 Right Side Sensor Right Side Sensor?If resistance is outside of range Go to Step D If resistance is outside of range Go to Step E Measure resistance between Way pin C13 and 3-way pin BReplace Central processing Unit. Go to Step See Fault Code Isolation Procedure Index on page 1 Component Code SID 11, FMI Left Side Sensor Left Side Sensor? Code 16 SID 11, FMI 2 Left Side SensorIf resistance is out of range Go to Step D If resistance is out of range Go to Step E Measure resistance between Way pin D13 and 3-way pin BIf resistance is out of range Index on page 1 Clearing on page 1 If code 16 appearsRight Central Processing Unit Turn Signal Component Code SID 7, FMI Right Turn SignalRepair OEM wiring harness as Code 21 SID 7, FMI 2 Right Turn SignalIf equipped with a Right Side Sensor Required. Go to StepKey off Turn on right turn signal Volts of battery voltageIf voltage ﬂashes within If code other than 21 appears Left Component Code SID 8, FMI Left Turn SignalCode 22 SID 8, FMI 2 Left Turn Signal If voltage measures within Key off Turn on left turn signalIf code other than 22 appears This fault causes a failure of the Vorad system Component Code SID 3, FMI Brake Input ErrorGo to Step B If the brake lights are not Code 23 SID 3, FMI 2 Brake Input ErrorWorking correctly Go to Step Proper conﬁgurationConnector If there is not a wire in C9 Check pin C9 on 32-way If there is a wire in C9Key off Depress brake pedal Clearing on page 1 If code 23 appears Check for Codes. See If no codes appear Test completeThis page left blank intentionally Component Code SID 6, FMI Speed Input Error Code 24 SID 6, FMI 2 Speed Input Error Unit 32-way connector Have pins in C10 and C11If vehicle uses J-1939 or 1587 conﬁguration Between speed sensor Pins a and B 10K ohms or open circuitOhms Clearing on page 1 If code 24 appears Component Code 25 SID 231, FMI 2, 12 Cruise Signal Error TerminatingResistor If resistance is outside of range Go to Step B Way pin D7 and groundSee Engine OEM for PIN Location See Engine OEM For PIN Location Key off Measure resistance Key on If error codes Problem exists with Engine ECU. Repair Key off Reconnect engine ECU connectorIf 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 If communication errors Key on If no communication errorsIf code other than 31 appears This page left blank intentionally Component Code SID 248, FMI Vbus Error If any of the above conditions are not met Go to Step B Code 33 SID 248, FMI 12 Vbus ErrorIf any of the above conditions are not met Go to Step C Driver Display Connector pin D5Step D Clearing on page 1 If code 33 appears On page 1Antenna Not Detecting Targets Symptom Isolation ProceduresAppropriate isolation Properly Go to Step a Procedure Side Sensor Not Detecting Targets Side Sensor Detection Test Between pins 2 Key on Measure voltageGo to Step D If voltage is outside of range 4-way pin Measure resistance between Way pin C16Way pin C16 Ground Replace Side Sensor Display. Go to Step Go to Step EKey off Measure resistance between Way pin C14 Way pin C14 GroundGo to Step Go to Step F Way pin C12 Ground Key off Measure resistance between Way pin C12Ground is more than If resistance is outsideStep Detection Test There is no fallback mode for this symptom Driver Card Not ReadingNew Driver Card Driver Card Detection Test Appendix Bendix Vorad System Wiring DiagramEatonvorad Wiring DiagramNvram Fault Code Tree