- #Toad diagnostic software how to#
- #Toad diagnostic software manuals#
- #Toad diagnostic software software#
3.29 (a) Honda variable valve timing system. The upper lines in the two other pairs of curves represent operation with and the lower ones without change-over. In the graph (b) the central curve shows how the ECU varies the change-over point with speed. In this condition, the central cam, because it is higher than the other two, actuates the valves. Shown on the right is the condition when electronic control unit (ECU) has signalled a solenoid to open a valve allowing oil under pressure to push the three-piece hydraulic plunger to the right, locking all three together. In the section on the left, the two outer rocker arms are actuated by their cams, while the central one is idling.
Incorporated in the ECM are an 8-bit microprocessor, a co-processor.įig. Another option is either direct or distributor ignition timing. Among the features of the system are on-board diagnostics, back-up fuel and ignition circuits, and an assembly line diagnostics link. On the other hand, mass flow air metering with a hot wire anemometer is an optional alternative. However, the ECM, is served by signals from the throttle position indicator and manifold pressure and temperature sensors, and meters the air flow on the speed-density principle, so the rate of fuelling is regulated in relation to the computed mass flow. 12.38, regulating EGR, ignition, fuelling, overrun cut-off, air flow control, including during idling, and open, or closed-loop control over emissions. It is a complete engine-management system, Fig. To avoid repetition, therefore, only a few brief comments will be made here. In principle, the GM Multec multi-point system resembles the Bosch Motronic, Sections 12.17 to 12.21. The following list of standard diagnostic trouble codes is derived from SAE J 2012, by courtesy of Robert Bosch Ltd. The standard diagnostic plug (SAE J 1962) and the format of DTCs (SAE J 2012) have been covered in this book. This acknowledgement of 'difficulties' at the user end of a vehicle's life cycle has resulted in various standards being incorporated into OBD II, and similar standards are likely to feature in EOBD. It has long been acknowledged that the 'profusion' of diagnostic trouble codes, access to data, different interfaces between scan tools and ECMs, and other details, have made the work of service technicians more difficult than it perhaps needs to be. In reaching this conclusion it is natural to enquire why, when there is so much common ground, there are so many different approaches to diagnostics. Never hesitate to contact the customer support team with any question about your repairs or ECU chiptuning problems.Ī principal aim of this book is to show readers that there are significant amounts of technology that are common to all computer controlled automotive systems.
#Toad diagnostic software manuals#
Save hundreds of dollars by doing the diagnostics yourself and use the supplied manuals to help walk you through the process of fixing the problem. For those who are more advanced, the manuals also have comprehensive sections that go in depth covering every possible aspect, no matter how complex. Structured with pictures, schematics, and easy to follow directions any novice can understand.
#Toad diagnostic software how to#
The included manuals contain thousands of pages of fault codes, patches, PCB layouts, and step-by-step instructions on how to fix any code. Save logs from when your car is running smoothly to pinpoint future problems. Perform thorough health-checks on your car and generate custom dashboard charts, graphs, and gauges with live data then save them to compare over time.
#Toad diagnostic software software#
The TOAD software is designed to instantly show and locate existing problems and faults within the car, and tell you how to fix them.
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