GMW-8772-2006.pdf
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1、 WORLDWIDE ENGINEERING STANDARDS General Specification Electrical/Electronic PPEI 3.7 GMW8772 Platform to Powertrain Electrical Interface (PPEI) Specification Serial Data Architecture Subsystem Copyright 2006 General Motors Corporation All Rights Reserved March 2006 Originating Department: North Ame
2、rican Engineering Standards Page 1 of 17 1 Introduction This standard defines the Serial Data Architecture between Platform and Powertrain. 1.1 Applicability. The GMW8762 PPEI (Platform to Powertrain Electrical Interface) Standard Specification includes: General Information, On-Board Diagnostics and
3、 Electrical Requirements and GMLAN Serial Data Signal Definitions and Framing for the following nineteen PPEI subsystems standard specifications: 1. GMW8763 Power and Ground 2. GMW8764 Four Wheel Drive/All Wheel Drive Controls 3. GMW8765 Displays and Gauges 4. GMW8766 Engine Power Management 5. GMW8
4、767 Starter Control 6. GMW8768 Vehicle Theft Deterrent 7. GMW8769 Cruise Control 8. GMW8770 Cooling Fan Control 9. GMW8771 Air Conditioning Compressor Control 10. GMW8772 Serial Data Architecture 11. GMW8773 Brakes and Traction Control 12. GMW8774 Enhanced Evaporative Emissions and Fuel 13. GMW8775
5、Exhaust After-Treatment 14. GMW8776 Suspension Control 15. GMW8776 Transmission 16. GMW8778 Generator Control 17. GMW8779 Post Collision Operation 18. GMW8780 Power Take-Off and Fast Idle Control 19. GMW8781 Vehicle Speed and Rough Road Sensing Each of the nineteen PPEI subsystem standard specificat
6、ions contains the hardware, serial data, algorithms and calibrations for the named subsystem. The master PPEI document and all nineteen PPEI subsystem standard specifications are required to define the complete set of PPEI requirements. 2 References Note: Only the latest approved standards are appli
7、cable unless otherwise specified. 2.1 External Standards/Specifications. ISO 11898 SAE J1962 ISO 15031 SAE J2284 2.2 GM Standards/Specifications. GMW3001 GMW8769 GMW3059 GMW8770 GMW3122 GMW8771 GMW3173 GMW8773 GMW7349 GMW8774 GMW8762 GMW8775 GMW8763 GMW8776 GMW8764 GMW8777 GMW8765 GMW8778 GMW8766 GM
8、W8779 GMW8767 GMW8780 GMW8768 GMW8781 2.3 Additional References. TL 01.58.2041-R5 3 Subsystem Requirements 3.1 Functional Overview. Powertrain shall be interfaced with Platform via only one serial data link, which shall be high speed GMLAN. Powertrain shall not be a gateway between nodes on the link
9、. High speed CAN is part of the GM Local Area Network (GMLAN) communication strategy and has been approved for diagnostics by CARB. High speed GMLAN will be used to meet OBD/EOBD requirements for diagnostic serial data communication. GMW8772 GM WORLDWIDE ENGINEERING STANDARDS Copyright 2006 General
10、Motors Corporation All Rights Reserved Page 2 of 17 March 2006 3.2 Hardware Overview. The Platform and the Powertrain Electronics shall communicate via high speed CAN according to GMW3122 - GMLAN Dual Wire CAN Physical Layer Interface Specification, and GMW3104 - GMLAN Communication Strategy Specifi
11、cation. Reference the following serial data documents: ISO 11898 Road Vehicles - Interchange of Digital Information - CAN for High Speed Communication SAE J-2284 Dual Wire, High Speed CAN ISO 15031 Road Vehicles Communication Between Vehicle and External Equipment for Emissions-Related Diagnostics (
12、for OBD/EOBD legislated diagnostics) GMW3110 Enhanced Diagnostic Test Mode Specification (for non-legislated diagnostics) GMW3173 GMLAN Architecture and Bus Wiring Requirements The ECM shall contain one termination for the high speed CAN link. The termination shall be connected between CAN_H and CAN
13、_L bus signals. The platform shall provide the other termination in a manner consistent with the electrical specifications in SAE J2284 and GMW3122. Each device on the high-speed link that does not contain a termination shall provide a serial data interface that includes two (2) connector pins per C
14、AN bus signal (CAN_H and CAN_L, 4 pins total) that are adjacent and common to each other. Both pins per signal shall share EMC protection components. Refer to GMW3122 and GMW3173 for details. The Powertrain Electronics and the Platform Immobilizer device shall be able to transmit and receive data on
15、 the high speed CAN link when the battery voltage at the controller input pins is 7.0 to 16.0 Vdc. (This implies that there is no requirement for serial data transmission during a low voltage crank event). In the range of 16.0 to 18.0 Vdc all devices shall be able to transmit and receive data suffic
16、ient to allow the engine to start and run and sufficient for functionality of all OBD diagnostic functions. These ranges result from the Voltage Requirements for Starting defined in GMW8767 Section 3.5.2 PPEI Starter Control Requirements. All devices shall be able to transmit and receive data on the
17、 high speed CAN link in the normal operating voltage range as defined in GMW8767 Section 3.5.1 PPEI Starter Control Requirements. Note: The following paragraph states that the powertrain electronics shall not support two of the three methods for device wake-up identified in the GMLAN Strategy. The P
18、owertrain Electronics shall be capable of transmitting and receiving high-speed CAN frames when either the Accessory/Wakeup or Run/Crank signals are in the active state. The Powertrain Electronics shall be capable of communications within 100 ms of reaching either of these states. The Powertrain Ele
19、ctronics will not support wake- up via serial data traffic or wake-up using a dedicated discrete signal. Platform shall provide a gateway from any other vehicle serial data link to the high speed CAN link if communication is required between devices connected to these links. This gateway shall synth
20、esize the necessary input frames to Powertrain Electronics. 3.2.1 Block Diagram. The following block diagram (Figure 1) depicts a typical mechanization for the serial data link. The electrical interface between Powertrain and Platform is the only standard defined. -,-,- GM WORLDWIDE ENGINEERING STAN
21、DARDSGMW8772 Copyright 2006 General Motors Corporation All Rights Reserved March 2006 Page 3 of 17 ECM Diagnostic Connector POWERTRAINPLATFORM High Speed GMLAN Other Powertrain devices Platform Gateway(s) Other Serial Data Link(s) Platform devices Platform devices Figure 1: Serial Data Architecture
22、Block Diagram Table 1: Serial Data Architecture Serial Data Signals Signal Name Transmitter Notes Diagnostic Trouble Code Information Extended Powertrain Required -,-,- GMW8772 GM WORLDWIDE ENGINEERING STANDARDS Copyright 2006 General Motors Corporation All Rights Reserved Page 4 of 17 March 2006 3.
23、2.2 Diagnostic Connector. The diagnostic connector shall conform to SAE J1962. 3.3 Interface Description. 3.3.1 High Speed CAN Data Link. Reference GMW8762 Section 4 PPEI Serial Data Signal and Definitions and Framing for definitions of signals listed in Table 1. 3.3.1.1 GMLAN Signals. GMLAN signals
24、 for the defined subsystem specifications shown in Section 1.1 are summarized in each respective GMW specification. The detailed definitions of GMLAN signals and GMLAN standard frames are contained in GMW8762 Section 4 PPEI Serial Data Signal and Definitions and Framing Requirements. All GMLAN signa
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