SAE J 1699-1-2001 SAE J1850 Verification Test Procedures.pdf

1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro

2、m, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.Copyright 2006 SAE InternationalAll rights reserved. No part of this publication may be

3、reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying,recording, or otherwise, without the prior written permission of SAE.TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada)Tel: 724-776-4970 (outside USA)Fax: 724-

4、776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSURFACEVEHICLESTANDARDJ1699-1REAF.JUN2006Issued 2001-08Reaffirmed 2006-06Superseding J1699-1 AUG2001SAE J1850 Verification Test ProceduresTABLE OF CONTENTS1. Scope . 31.1 Purpose 31.2 Application 32. References . 32.1 Applicable

5、Documents 32.1.1 SAE Publications 32.2 Related Publications. 32.2.1 SAE Publications 33. Definitions. 44. Abbreviations and Acronyms 55. General Information 55.1 Test Procedure Overview . 55.1.1 Invalid CRC Test. 55.1.2 Message Structure Test 55.1.3 Bus Arbitration Test 55.1.4 Bus Fault Test. 55.1.5

6、 Symbol Parameter Limits . 55.2 Generic Test Conditions . 55.2.1 Digital Scope Requirements. 55.2.2 Power Supply Requirements 65.2.3 Digital Volt Ohm Meter (DVOM) Requirements 65.2.4 Ground Offset Voltage Device 65.2.5 Small Signal Ground Offset Voltage Device . 75.2.6 VPW Bus RX/TX Circuit . 85.2.7

7、 PWM Bus RX/TX Circuit. 95.2.8 PWM Scope Input Filter 105.2.9 Network Access Device Requirements (NAD) . 105.2.10 Network Load Device for PWM and VPW 11SAE J1699-1 Reaffirmed JUN2006-2-6. Invalid CRC Test .116.1 Purpose 116.2 Equipment.116.3 Test Setup.116.4 Procedure .136.4.1 OBD-II Scan Tool as th

8、e DUT.136.4.2 Vehicle as the DUT .147. Message Structure Test 147.1 Purpose 147.2 Equipment.147.3 Test Setup.147.4 Procedure .147.4.1 OBD-II Scan Tool-Transmitted Frame Symbol Inspection.147.4.2 Vehicle-Transmitted Frame Symbol Inspection .148. Bus Arbitration Test.158.1 Purpose 158.2 Equipment.158.

9、3 Test Setup.158.4 Theory of Operation158.5 Procedure .168.5.1 OBD-II Scan Tool as the DUT.168.5.2 Vehicle as the DUT .169. Bus Fault Test .179.1 Purpose 179.2 Equipment.179.3 Test Setup.179.4 Procedure .1710. Symbol Parameter Limits1810.1 Purpose 1810.2 Equipment.1810.3 Test Setup.1810.4 Test Setup

10、s .1810.4.1 Test Setup 11810.4.2 Test Setup 21810.4.3 Test Setup 31810.5 Procedure .19Appendix A OBD-II Scan Tool Signal Ground and Chassis Ground Test.21Appendix B SAE J1962 Electrical Power Load Test.22Appendix C Bus Impedance Calibration.24Figure 1 Ground Offset Voltage Device 6Figure 2 Small Sig

11、nal Ground Offset Voltage Device .7Figure 3 Vpw Bus RX/TX Circuit.8Figure 4 Pwm Bus RX/TX Circuit9Figure 5 Pwm Scope Input Filter.10Figure 6 Sae J1850 Network Load Box 11Figure 7 Obd-II Scan Tool, Negative Ground Offset from SAE J1962 Connector.12Figure 8 Obd-II Scan Tool, Positive Ground Offset fro

12、m SAE J1962 Connector 12Figure 9 Vehicle, Negative Ground from the SAE J1962 Connector.13SAE J1699-1 Reaffirmed JUN2006-3-Figure 10 Messages for Compliance Testing 13Figure 11 Forced Arbitration on the Third Byte of Response Message Bit Number 4 16Figure 12 Example SAE J1850 AC and DC Parameters 191

13、. Scope1.1 PurposeThis SAE Recommended Practice recommends test methods, test procedures, and specific testparameters to help verify that vehicles and test tools can communicate using the SAE J1850. This documentonly verifies the portion of SAE J1850 that is used for OBD-II communications. The term

14、“test tool” issynonymous with OBD-II Scan tool.1.2 ApplicationThe procedures, methods, and parameters contained in this document apply to vehicles andtest tools which support OBD-II messages, as outlined in SAE J1979. SAE J1699 is intended primarily for useas a design verification aid.1.3 RationaleT

15、his document has been reaffirmed to comply with the SAE 5-Year Review policy.2. References2.1 Applicable PublicationsThe following publications form a part of this specification to the extent specifiedherein. Unless otherwise specified, the latest issue of SAE publications shall apply.2.1.1 SAE PUBL

16、ICATIONSAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel:877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org.SAE J1699-2OBD-II Related SAE Specification Verification Test ProceduresSAE J1850 MAY2001Class B Data Communication Network InterfaceSAE

17、J1962 FEB98Diagnostic ConnectorSAE J1978 FEB98OBD-II Scan ToolSAE J1979 SEP97E/E Diagnostic Test Modes2.2 Related PublicationsThe following publications are provided for information purposes only and are not arequired part of this specification.2.2.1 SAE PUBLICATIONSAvailable from SAE, 400 Commonwea

18、lth Drive, Warrendale, PA 15096-0001, Tel:877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org.SAE J1213-1 SEP97Glossary of Vehicle Networks for Multiplexing and Data CommunicationsSAE J1930 MAY98Electrical/Electronic Systems Diagnostic Terms, Definitions, Abbreviations, a

19、rbitration test shall be within 1 s of the arbitration event and scope tracetrigger9. Indicate valid/invalid CRC10. Ability to filter network messagesSAE J1699-1 Reaffirmed JUN2006-11-5.2.10 NETWORK LOAD DEVICE FOR PWM AND VPWFigure 6 shows the schematic for the PWM and VPW networkload circuits. See

20、 SAE J1850 for the values of R and C loads.FIGURE 6SAE J1850 NETWORK LOAD BOX6. Invalid CRC Test6.1 PurposeVerifies that the DUT generates correct CRCs. Also, verifies that the module discards any messagesent to it with an incorrect CRC.6.2 Equipmenta. A NADb. Digital oscilloscope (optional)c. Netwo

21、rk Load Deviced. PS#1e. Ground Offset Voltage Device6.3 Test Setup6.3.1 Make connections as shown in Figures 7, 8, and 9.6.3.2 Set PS#1 to 13.5 V.6.3.3 Set the Ground Offset Voltage Device to 0 V.6.3.4 Set PS#3 to 5.0 V for PWM and 12 V for VPW setups.6.3.5 Set the Small Signal Ground Offset Voltage

22、 Device to 0 V.SAE J1699-1 Reaffirmed JUN2006-12-FIGURE 7OBD-II SCAN TOOL, NEGATIVE GROUND OFFSET FROM SAE J1962 CONNECTORFIGURE 8OBD-II SCAN TOOL, POSITIVE GROUND OFFSET FROM SAE J1962 CONNECTORSAE J1699-1 Reaffirmed JUN2006-13-FIGURE 9VEHICLE, NEGATIVE GROUND FROM THE SAE J1962 CONNECTOR6.3.6 When

23、 the DUT is an OBD-II Scan Tool, connect the maximum vehicle load as shown in Figures 7 and 8 witha 0.9 V ground offset for PWM or 1.9 V ground offset for VPW.6.3.7 When the DUT is a vehicle, connect the off vehicle maximum load (see SAE J1850: off vehicle loadresistance and load capacitance case fo

24、r the OBD-II Scan Tool load) as shown in Figure 9 with a 0.1 Vground offset.NOTE Testing for a vehicle, positive offset from the SAE J1962 connector is not required.6.4 Procedure6.4.1 OBD-II SCAN TOOL AS THE DUT6.4.1.1 DUT CRC GenerationConfigure the DUT to send an SAE J1979 Mode $01 Request Current

25、 PowertrainDiagnostic Data, PID 00 the format and data bytes of this message are shown in Figure 10. Transmit themessage and use the NAD to view the transmitted data bytes. The CRC is the last byte of the transmittedmessage (before any IFR if present).FIGURE 10MESSAGES FOR COMPLIANCE TESTINGSAE J169

26、9-1 Reaffirmed JUN2006-14-6.4.1.2 DUT CRC ReceptionConfigure the DUT to transmit an SAE J1979 Mode $01 Request CurrentPowertrain Diagnostic Data PID 00, and setup the NAD to respond with the appropriate response, but withan incorrect CRC byte. The DUT should not accept the response as valid.6.4.2 VE

27、HICLE AS THE DUT6.4.2.1 DUT CRC GenerationConfigure the NAD to send the DUT an SAE J1979 Mode $01 Request for CurrentPowertrain Diagnostic Data, PID 00. Use the NAD to view the response transmitted by the DUT. Ensurethat the CRC is correct for the transmitted response message. Refer to SAE J1850 for

28、 CRC calculations.6.4.2.2 DUT CRC ReceptionConfigure the NAD to send the DUT an SAE J1979 Mode $01 Request CurrentPowertrain Diagnostic Data, PID 00 with an incorrect CRC byte. The DUT should ignore the requestmessage, and therefore not respond.7. Message Structure Test7.1 PurposeVerifies that the D

29、UT uses all required frame elements in the proper order, and that it is capable ofrecognizing and responding to network traffic.7.2 Equipmenta. A NADb. Digital oscilloscope (optional)c. Network Load Deviced. PS#1e. Ground Offset Voltage Device7.3 Test Setup7.3.1 Make connections as shown in Figures

30、7, 8, and 9.7.3.2 Set PS#1 to 13.5 V.7.3.3 Set the Ground Offset Voltage Device to 0 V.7.3.4 Set PS#3 to 5.0 V for PWM and 12 V for VPW setups.7.3.5 Set the Small Signal Ground Offset Voltage Device to 0 V.7.3.6 When the DUT is an OBD-II Scan Tool, connect the maximum vehicle load as shown in Figure

31、s 7 and 8 witha 0.9 V ground offset for PWM or 1.9 V ground offset for VPW.7.4 Procedure7.4.1 OBD-II SCAN TOOL - TRANSMITTED FRAME SYMBOL INSPECTIONForce the DUT to transmit the Request forSAE J1979 Powertrain Data, PID 00 the format and data bytes of this message are shown in Figure 10.Acquire the

32、waveform of the DUT message transmission and verify that each of the necessary symbols ispresent in the frame. See 6.6 of SAE J1850 for symbols meanings.7.4.2 VEHICLE - TRANSMITTED FRAME SYMBOL INSPECTIONForce the DUT to respond to the Request for SAEJ1979 Powertrain Data, PID 00 the format and data

33、 bytes of this message are shown in Figure 10. Acquirethe waveform of the DUT message transmission and verify that each of the necessary symbols is present inthe frame. See 6.6 of SAE J1850 for symbol meanings.SAE J1699-1 Reaffirmed JUN2006-15-8. Bus Arbitration Test8.1 PurposeThis test confirms the

34、 DUT arbitrates for bus control during message header transmission. TheNAD will generate a Dominant bit when the DUT is transmitting a Recessive bit. The DUT should stoptransmitting until the EOF time-out is reached. Refer to SAE J1850 for EOF times.8.2 Equipmenta. A NADb. Digital oscilloscopec. Net

35、work Load Deviced. PS#1e. Ground Offset Voltage Device8.3 Test Setup8.3.1 Make connections as shown in Figures 7, 8, and 9.8.3.2 Set PS#1 to 13.5 V.8.3.3 Set the Ground Offset Voltage Device to 0 V.8.3.4 Set PS#3 to 5.0 V for PWM and 12 V for VPW setups.8.3.5 Set the Small Signal Ground Offset Volta

36、ge Device to 0 V.8.3.6 When the DUT is an OBD-II Scan Tool, connect the maximum vehicle load as shown in Figures 7 and 8 witha 0.9 V ground offset for PWM or 1.9 V ground offset for VPW.8.4 Theory of OperationArbitration is caused when a Dominant bit and a Recessive bit are transmitted at thesame ti

37、me. The NAD shall transmit a Dominant bit at the same time the DUT is transmitting a Recessive bit.The NAD shall test each byte of the response message that is possible to test. (If the DUT is a vehicle; starttesting at the third byte. If the DUT is an OBD-II Scan Tool; start testing at the first by

38、te.)The question marks found in Figure 10 are determined by the NAD, by forcing the OBD-II Scan Tool to transmitthe Request message (if DUT is an OBD-II Scan Tool) or the NAD transmits a Request message to the DUT (ifDUT is a vehicle).The third byte of a response message or a request message is alwa

39、ys the same from the DUT. Arbitrationtesting may begin with this byte and end on the CRC byte. The arbitration pulse width shall be varied based onthe SAE J1850 parameters. The maximum, nominal, and minimum receive value shall be used. The NAD will monitor the bus looking for the characteristic mess

40、age and watch the bits to determine when tosend out the active bit. Figure 11 shows the sequence of bytes and the forced arbitration events on the thirdbyte of the response message. The NAD must synchronize and respond in less than 24 s after the Target IDhas been detected.SAE J1699-1 Reaffirmed JUN

41、2006-16-FIGURE 11FORCED ARBITRATION ON THE THIRD BYTE OF RESPONSE MESSAGE BIT NUMBER 48.5 Procedure8.5.1 OBD-II SCAN TOOL AS THE DUT(Use Figure 7)8.5.1.1 Set up the DUT to transmit a Request for SAE J1979 Powertrain data, PID 00 the format and data bytes ofthis message are shown in Figure 10.8.5.1.2

42、 Program the NAD to transmit an arbitration pulse at the correct bit. See Figure 8. Also, vary the pulsewidth to the maximum and minimum as specified in SAE J1850.8.5.1.3 Verify the DUT stops transmitting.8.5.2 VEHICLE AS THE DUT(Use Figure 9)8.5.2.1 Configure the NAD to transmit a request for SAE J

43、1979 Powertrain data, PID 00 the format and data bytesof this message are shown in Figure 10.8.5.2.2 Program the NAD to transmit an arbitration pulse at the correct bit.8.5.2.3 Verify the DUT stops transmitting.SAE J1699-1 Reaffirmed JUN2006-17-9. Bus Fault Test9.1 PurposeThis test will verify that

44、the DUT withstands all failure modes specified by SAE J1850 as requiredmodes.9.2 Equipmenta. A NADb. Digital oscilloscope (optional)c. Network Load Deviced. PS#1e. Ground Offset Voltage Device9.3 Test Setup9.3.1 Make connections as shown in Figures 7, 8, and 9.9.3.2 Set PS#1 to 13.5 V.9.3.3 Set the

45、Ground Offset Voltage Device to 0 V.9.3.4 Set PS#3 to 5.0 V for PWM and 12 V for VPW setups.9.3.5 Set the Small Signal Ground Offset Voltage Device to 0 V.9.3.6 When the DUT is an OBD-II Scan Tool, connect the maximum vehicle load as shown in Figures 7 and 8 witha 0.9 V ground offset for PWM or 1.9

46、V ground offset for VPW.9.4 Procedure9.4.1 Program the NAD to continuously transmit a request for SAE J1979 Mode $01 Request Current PowertrainDiagnostic Data, PID 00 message if the DUT is a vehicle. If the DUT is an OBD-II Scan Tool, force the OBD-II Scan Tool to transmit messages.9.4.2 (DUT is an

47、OBD-II Scan tool) Disconnect power at the DUT - NAD should continue transmitting and thesymbols should be within limits specified in SAE J1850. Connect power back to the DUT (see SAE J18506.9.1 a).9.4.3 Short the SAE J1850 bus to ground - data communications may be lost; however, the DUT should not

48、bedamaged due to the short to ground. Remove short to ground (see SAE J1850, 6.9.1 b).9.4.4 Short the SAE J1850 bus to battery voltage - data communications may be lost; however, the DUT shouldnot be damaged due to the short to battery. Remove short to battery (see SAE J1850, 6.9.1 c).9.4.5 (DUT is

49、an OBD-II Scan tool) Disconnect the ground at the DUT - the NAD should continue transmitting andthe symbols should be within limits specified in SAE J1850. Connect ground back to the DUT (see SAEJ1850, 6.9.1 d).SAE J1699-1 Reaffirmed JUN2006-18-10. Symbol Parameter Limits10.1 PurposeThe purpose of this test is to verify that the OBD-II Scan Tool or Vehicle Network receives andtransmits symbols to the limits specified SAE J1850.10.2 Equipmenta. A NADb. Digital oscilloscopec. Network Load Deviced. PS#1e. Ground Offset Volta