LS2 ECM info
Thread Starter
6600 rpm clutch dump of death Administrator
Joined: Dec 2001
Posts: 4,983
Likes: 13
From: Texas
LS2 ECM info http://www.ls1.com.au/forum/showthread.php?t=27840
E40 ENGINE CONTROL MODULE (ECM)
The Gen IV is managed by the most sophisticated engine controller in existence, known internally as the E40. The heart of this ECM is a 32-bit microprocessor with a clock speed of 32 MHz, compared to 24 MHz with the P59 controller. The E40 has roughly the same amount of read-only “flash” memory (one megabyte), but it adds 32 kilobytes of random access memory.
The E40 means the most precise engine management possible, optimizing performance according to temperature or operating conditions and virtually eliminating unintended variation in every function it controls, from ignition timing to fuel delivery to emissions reduction. It allows Powertrain engineers to monitor more engine operations, and it improves the performance and accuracy of the On-Board Diagnostics (OBDII) system. It also provides the capability to manage new systems such as up-integrated ETC and Displacement on Demand.
The E40 uses a new monitoring protocol known as rate-based diagnostics. This protocol improves the robustness of OBD II and ensures optimal performance of emissions-control systems. With rate-based diagnostics, the software increases the frequency at which the ECM checks various engine operations, and particularly emissions systems such as the catalytic converter, oxygen sensors and positive crankcase ventilation (PCV). Rate-based diagnostics more reliably monitor real-word operation of these systems, and allow regulatory agencies to more easily measure and certify emissions compliance.
Finally, the E40 re-introduces the ECM. The P59 is a powertrain control module (PCM), and controls both engine and transmission operation with a single processor. The E40 works with a separate transmission control module, communicating via a high-speed data connection. The switch was driven by two factors: a desire for increased modularity and continuing demand for GM Powertrain transmissions by other automobile manufacturers. Separate ECMs and TCMs increase the portability of transmissions and allow an engine to be more easily matched with a variety of transmissions. Further, Powertrain’s transmission customers want Powertrain’s controls as well. The TCM can be matched with other manufacturers’ ECMs.
E40 ENGINE CONTROL MODULE (ECM)
The Gen IV is managed by the most sophisticated engine controller in existence, known internally as the E40. The heart of this ECM is a 32-bit microprocessor with a clock speed of 32 MHz, compared to 24 MHz with the P59 controller. The E40 has roughly the same amount of read-only “flash” memory (one megabyte), but it adds 32 kilobytes of random access memory.
The E40 means the most precise engine management possible, optimizing performance according to temperature or operating conditions and virtually eliminating unintended variation in every function it controls, from ignition timing to fuel delivery to emissions reduction. It allows Powertrain engineers to monitor more engine operations, and it improves the performance and accuracy of the On-Board Diagnostics (OBDII) system. It also provides the capability to manage new systems such as up-integrated ETC and Displacement on Demand.
The E40 uses a new monitoring protocol known as rate-based diagnostics. This protocol improves the robustness of OBD II and ensures optimal performance of emissions-control systems. With rate-based diagnostics, the software increases the frequency at which the ECM checks various engine operations, and particularly emissions systems such as the catalytic converter, oxygen sensors and positive crankcase ventilation (PCV). Rate-based diagnostics more reliably monitor real-word operation of these systems, and allow regulatory agencies to more easily measure and certify emissions compliance.
Finally, the E40 re-introduces the ECM. The P59 is a powertrain control module (PCM), and controls both engine and transmission operation with a single processor. The E40 works with a separate transmission control module, communicating via a high-speed data connection. The switch was driven by two factors: a desire for increased modularity and continuing demand for GM Powertrain transmissions by other automobile manufacturers. Separate ECMs and TCMs increase the portability of transmissions and allow an engine to be more easily matched with a variety of transmissions. Further, Powertrain’s transmission customers want Powertrain’s controls as well. The TCM can be matched with other manufacturers’ ECMs.
32, 40, bit, control, controller, diagnostic, e40, ecm, enable, engine, ls2, management, operation, powertrain
