An in depth visible illustration illustrating the inner elements and fluid pathways of a particular computerized transmission management unit is important for understanding its operation and troubleshooting points. The sort of schematic usually depicts the intricate community of valves, solenoids, and channels liable for directing hydraulic strain to numerous components of the transmission, enabling gear shifts and general management. For instance, it reveals how fluid flows by means of the channels to have interaction a selected gear when a solenoid is activated.
Such a illustration is essential for diagnosing malfunctions inside the computerized transmission system. It gives a roadmap for figuring out potential issues akin to valve sticking, clogged passages, or solenoid failures. Its historic relevance lies in its evolution alongside computerized transmission expertise, turning into more and more complicated as transmissions have change into extra subtle, aiding technicians in understanding more and more complicated techniques. The power to interpret this illustration considerably reduces diagnostic time and promotes correct repairs, in the end extending the life and optimizing the efficiency of the transmission.
This text will delve into the specifics of deciphering these diagrams, widespread issues related to the management unit, and the instruments and methods used to diagnose and restore points inside the computerized transmission system.
1. Hydraulic circuits
The automated transmission’s performance hinges upon the exact choreography of pressurized fluid. Throughout the complicated structure of the management unit, hydraulic circuits type the nervous system. These are usually not easy channels, however quite an intricate net of passages designed to direct transmission fluid to particular actuators at particular instances, dictating when and the way gears interact. The “4r70w valve physique diagram” serves because the blueprint for this intricate system. With out the diagram, understanding the cause-and-effect relationship inside these circuits turns into an train in futility. For example, a shift delay may stem from a leak inside a particular hydraulic circuit. The diagram gives the essential roadmap to hint that circuit, isolate the leak, and impact the restore.
Take into account a situation: a automobile exhibiting harsh upshifts. The management unit diagram permits a technician to hint the hydraulic circuit liable for modulating shift timing. By analyzing the diagram, the technician can establish potential culprits a sticking valve, a worn seal, or a blocked passage inside that particular circuit. This focused strategy contrasts sharply with a generalized, trial-and-error methodology. It’s also necessary to notice that the particular hydraulic circuits work together with solenoids within the valve physique to permit the transmission to shift to increased gears. Solenoids energize and de-energize directing fluid by means of the hydraulic circuits permitting the transmission to shift easily.
The effectiveness of computerized transmission restore is inextricably linked to understanding these circuits. It’s one factor to look at a symptom; it’s one other to grasp the underlying hydraulic trigger. The diagram empowers this understanding. Challenges stay in deciphering complicated circuits and diagnosing intermittent faults. Nevertheless, by mastering the studying and deciphering of the diagram, technicians can transfer from mere symptom-chasers to knowledgeable and efficient problem-solvers. This ability interprets immediately into elevated effectivity and decreased downtime. Understanding its internal workings of the automated transmission.
2. Valve identification
Throughout the metallic labyrinth of the automated transmission, every valve possesses a novel identification and an outlined function. The “4r70w valve physique diagram” is the important thing to unlocking this identification. Every valve, represented as an emblem on the diagram, orchestrates a sequence of actions: directing fluid stream, modulating strain, and in the end, dictating the engagement of gears. The diagram unveils these very important roles. With out correct identification, troubleshooting turns into a recreation of likelihood. Think about a situation: the transmission refuses to shift into overdrive. A technician, unfamiliar with the diagram, would possibly substitute solenoids indiscriminately, a expensive and sometimes futile endeavor. Nevertheless, with the diagram in hand, the technician can pinpoint the particular valve liable for overdrive engagement and focus diagnostic efforts accordingly.
The sensible significance is finest illustrated by means of instance. Take into account the 2-3 shift valve. Its malfunction can result in erratic or harsh shifts. The “4r70w valve physique diagram” not solely identifies this valve but in addition illustrates the fluid pathways it controls. By tracing these pathways, a technician can establish potential obstructions, leaks, or mechanical failures inside the valve itself. Maybe a small piece of particles has lodged inside the valve bore, limiting its motion. The diagram guides the technician to this particular location, enabling a focused and efficient restore. Incorrect identification can result in a cascade of errors, exacerbating the preliminary drawback and probably damaging different transmission elements. Exact identification is the cornerstone of correct prognosis and profitable restore.
In summation, the flexibility to accurately establish every valve inside the intricate community of the transmission is paramount, and the “4r70w valve physique diagram” gives the required roadmap. The challenges lie in deciphering complicated schematics and staying abreast of design modifications. However, mastery of those diagrams interprets immediately into environment friendly, correct, and cost-effective transmission restore. The diagram transforms what could be a posh and intimidating problem right into a manageable, solvable drawback, providing a path to an accurate diagnostic conclusion.
3. Solenoid areas
The metallic core of an computerized transmission, a labyrinth of gears and hydraulic pathways, depends on exactly timed interventions to shift gears easily. The “4r70w valve physique diagram” reveals the strategic placement of solenoids, the electro-hydraulic actuators on the coronary heart of this orchestration. Every solenoid, triggered by the transmission management module, opens or closes hydraulic circuits, initiating gear modifications. Misidentification or ignorance of their areas can flip a restore right into a irritating and costly endeavor.
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Exact Positioning for Shift Accuracy
Every solenoid occupies a particular location on the valve physique, as illustrated within the diagram. This positioning isn’t arbitrary; it’s dictated by the hydraulic circuit every solenoid controls. For instance, the shift solenoids liable for 1-2 and 2-3 shifts should be exactly situated to direct fluid to the suitable clutch packs or bands. A mechanic, tracing a shift drawback, depends on the diagram to pinpoint the solenoid accountable and confirm its perform. This accuracy minimizes wasted time and ensures focused repairs.
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Shade Coding and Identification Marks
The “4r70w valve physique diagram” usually contains notations about colour coding or identification marks on the solenoids themselves. These visible cues are important for confirming that the proper solenoid is within the right location, particularly after a rebuild or restore the place solenoids may need been eliminated. Failure to stick to those markings can result in incorrect shift patterns and even transmission harm. Think about a situation the place two solenoids are inadvertently swapped; the ensuing erratic shifting and potential for catastrophic failure underscores the significance of this element.
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Wiring Harness Connections and Circuit Testing
Past the bodily location, the diagram gives perception into the wiring harness connections for every solenoid. This info is important for electrical testing. Utilizing the diagram, a technician can establish the proper pins on the harness to check for resistance, voltage, and floor continuity. This electrical prognosis, guided by the situation info on the diagram, can shortly isolate electrical faults inside the solenoid circuit, distinguishing between a defective solenoid and a wiring drawback.
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Accessibility for Alternative and Restore
The diagram additionally implicitly conveys details about the accessibility of every solenoid for substitute or restore. Some solenoids could also be simply accessible as soon as the transmission pan is eliminated, whereas others would possibly require additional disassembly of the valve physique. This understanding of accessibility, derived from the diagram, permits a technician to plan the restore effectively, minimizing pointless work and potential for collateral harm.
Finally, the data encoded within the “4r70w valve physique diagram” relating to solenoid areas is greater than only a map; it’s a information to understanding the digital and hydraulic orchestration of the automated transmission. With out this information, a technician faces a posh and probably overwhelming system. With it, the identical system turns into a logical and manageable problem.
4. Fluid pathways
Deep inside the coronary heart of the 4R70W transmission lies a posh community of channels and passages. These are the fluid pathways, the arteries and veins of the system, by means of which hydraulic fluid programs, carrying the lifeblood of the transmission to its many elements. The 4R70W valve physique diagram serves as an in depth map of this inner panorama. It’s greater than only a schematic; it is a key to understanding how the transmission features, shifts gears, and in the end propels a automobile ahead. With no clear understanding of those pathways, even probably the most expert technician dangers misdiagnosis and ineffective repairs. Think about a blocked artery within the human physique; the results are dire. Equally, a blockage in a crucial fluid pathway inside the transmission can result in erratic shifting, slipping gears, or full transmission failure. The diagram is the diagnostic device, the stethoscope, revealing the place such blockages might lie. It illustrates how pressurized fluid is routed to have interaction clutches and bands, dictating which gear is chosen at any given second. Each line, each junction on the diagram represents an important level the place fluid stream could be affected, impacting the whole system. The results could be extreme if left unchecked.
Take into account a particular situation: a delayed engagement of reverse gear. The diagram allows one to hint the fluid pathway liable for activating the reverse clutch. By meticulously following the strains and symbols, a technician can pinpoint potential causes a sticking valve, a clogged passage, or a broken seal inside that particular circuit. With out the diagram, this prognosis turns into a cumbersome technique of trial and error. The diagrams worth extends past easy fault discovering. It allows proactive upkeep. By understanding the stream patterns, technicians can establish areas liable to put on or blockage, permitting for preventative measures. For instance, inspecting and cleansing the valve physique at common intervals can forestall the buildup of particles that restricts fluid stream, extending the lifetime of the transmission. The diagram additionally facilitates modifications and upgrades. Excessive-performance fanatics use it to design improved fluid pathways, optimizing strain and stream to reinforce shifting velocity and general transmission efficiency. Such modifications require a deep understanding of the system and couldn’t be tried with out the diagrams steerage.
In conclusion, the connection between fluid pathways and the 4R70W valve physique diagram is prime to the correct perform and upkeep of the automated transmission. The diagram isn’t merely a drawing; it’s a highly effective device that empowers technicians to diagnose issues, carry out repairs, and improve the efficiency of the transmission. The challenges lie in deciphering the complexity of the diagram and understanding the interaction of its varied elements. However for many who grasp its intricacies, it gives a pathway to environment friendly and efficient transmission service. Moreover, utilizing the diagram makes it straightforward to establish points for a long-term upkeep plan that can lower your expenses on sudden transmission repairs sooner or later.
5. Stress regulation
Throughout the intricate structure of the 4R70W computerized transmission, hydraulic strain acts because the lifeblood, powering the shifts and guaranteeing easy operation. It’s not merely the presence of strain that issues, however its exact and constant regulation. The 4R70W valve physique diagram is the important thing to understanding this crucial side, revealing the complicated community of valves, springs, and orifices that work in live performance to take care of optimum strain ranges. A deviation from these ranges, whether or not too excessive or too low, can wreak havoc on the transmission’s efficiency and longevity.
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The Function of the Stress Regulator Valve
On the coronary heart of strain regulation lies the strain regulator valve. The 4R70W valve physique diagram reveals its location and its connection to the primary pump output. This valve’s major perform is to bleed off extra strain, stopping over-pressurization that might harm seals and elements. A worn or sticking strain regulator valve can result in excessively excessive line strain, leading to harsh shifts and untimely put on. Conversely, a valve that bleeds off an excessive amount of strain may cause slipping and delayed engagement.
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The Affect of Enhance Valves and Springs
The diagram additionally illustrates the presence of enhance valves and comes, which work along side the strain regulator valve to modulate strain primarily based on engine load and throttle place. These elements enhance line strain beneath heavy load circumstances, guaranteeing enough clamping pressure on the clutches and bands. A weak or damaged enhance spring can result in inadequate line strain, leading to slipping beneath load. Conversely, a caught enhance valve may cause extreme line strain always, resulting in harsh shifts.
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The Impression of Orifice Measurement and Location
The 4R70W valve physique diagram depicts the scale and site of assorted orifices inside the hydraulic circuits. These small openings limit fluid stream, creating strain drops which might be important for correct valve operation. A clogged or enlarged orifice can disrupt the strain stability inside the transmission, resulting in shifting issues. For instance, an enlarged orifice within the circuit resulting in the direct clutch may cause a delayed or delicate engagement of third gear.
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The Diagnostic Significance of Stress Testing Ports
Lastly, the diagram reveals the situation of strain testing ports, which permit technicians to measure line strain at varied factors inside the transmission. These ports present worthwhile diagnostic info, enabling technicians to pinpoint pressure-related issues shortly. By evaluating the measured strain readings with the specs outlined within the service handbook, a technician can establish defective valves, clogged passages, or pump failures.
The fragile dance of strain regulation inside the 4R70W transmission is ruled by a posh interaction of mechanical and hydraulic elements, all meticulously detailed within the valve physique diagram. An intensive understanding of this diagram is important for diagnosing and resolving pressure-related points, guaranteeing the graceful and dependable operation of the transmission. The diagram is an indespensible device to grasp how every part works collectively to maintain the system inside specification.
6. Part interplay
The 4R70W transmission, a marvel of engineering, features not as a set of disparate components however as a symphony of interconnected elements. The valve physique diagram is the rating for this hydraulic orchestra, detailing the exact relationship and interplay between every valve, solenoid, spring, and channel. Every elements motion influences the others in a series response of strain, stream, and in the end, gear choice. Take into account a situation: The transmission displays a harsh 1-2 shift. The valve physique diagram reveals that the 1-2 shift valve, influenced by the governor strain and the shift solenoid, controls the stream of fluid to the 1-2 accumulator. The accumulator cushions the shift by absorbing among the preliminary strain. If the accumulator spring is damaged, the shift turns into harsh. The diagram illuminates not solely the person perform of every part but in addition the cause-and-effect relationship between them, proving the diagram is important to see the elements in relation to one another. The interaction between trigger and impact gives the inspiration for system-level prognosis and restore. An incomplete image usually leads to a misdiagnosis or, worse, consequential harm.
Understanding part interplay strikes past merely figuring out particular person components. It is about tracing the cascade of occasions that results in a selected final result. The diagram permits technicians to simulate these occasions mentally, predicting the impact of a malfunctioning part on the general system. Think about a clogged orifice within the circuit resulting in the overdrive servo. The diagram makes it clear {that a} restricted stream will result in a sluggish engagement of overdrive. Understanding of this nature allows predictive diagnostics, a robust strategy that anticipates potential failures earlier than they manifest as main issues. Technicians can forestall costly failures through the use of the diagram to establish areas liable to put on, blockage, or misalignment by analyzing the complicated fluid strain interactions. By understanding the place probably the most strain is the diagram might point out a weak level and can be utilized for proactive upkeep.
In essence, the 4R70W valve physique diagram transcends a mere components checklist; it serves as a roadmap to understanding part interplay. The problem lies in deciphering its intricacies and making use of that information to real-world diagnostic eventualities. Technicians can elevate their ability set from mere half substitute to insightful, system-level problem-solving by recognizing how every valve, spring, and solenoid contributes to the transmission’s efficiency. This whole image allows correct diagnostics. That is how a technician turns right into a grasp.
7. Troubleshooting assist
The seasoned transmission technician stands earlier than a disassembled 4R70W, a veteran of numerous miles and kit shifts, now silenced. The signs have been clear: a hesitation between second and third gear, adopted by a pronounced shudder. However the trigger remained elusive, hidden inside the labyrinthine passages and exactly calibrated elements of the valve physique. That is the place the 4R70W valve physique diagram ceases to be a mere schematic and transforms right into a potent troubleshooting assist. It’s a roadmap by means of the mechanical complexities, providing perception the place mere statement fails. With out the diagram, prognosis turns into a irritating train in guesswork, a expensive components substitute spree pushed by hunches quite than understanding. With it, the technician features an important benefit: the flexibility to hint the hydraulic pathways, establish the valves liable for the troublesome shift, and pinpoint the supply of the malfunction.
Think about tracing the fluid stream with the diagram, following the strain because it’s directed by means of the valve physique to have interaction the direct clutch pack. The diagram reveals a small orifice within the circuit, and upon inspection, it is discovered to be partially blocked with particles. This seemingly insignificant obstruction starved the clutch pack of the required strain, inflicting the hesitation and shudder. The diagram served as a information, main on to the foundation trigger, saving hours of pointless labor and the expense of changing practical components. The significance of the diagram as a troubleshooting device extends past figuring out blockages. It permits for the systematic elimination of potential causes, a logical technique of deduction guided by the hydraulic circuit format. A sticking valve, a worn seal, a malfunctioning solenoid every could be recognized and examined primarily based on their location and performance as outlined within the diagram. This methodical strategy ensures that no stone is left unturned, maximizing the possibilities of an correct prognosis. The worth lies in its potential to show a posh drawback right into a sequence of manageable steps, every guided by the logical stream of the diagram.
The 4R70W valve physique diagram, subsequently, is greater than only a drawing; it is a crucial part of efficient transmission restore. Whereas expertise and instinct play a job, they’re no substitute for the exact information offered by the diagram. The problem lies in mastering its intricacies, in studying to “learn” the hydraulic language it conveys. However for many who take the time to grasp its symbols and pathways, the diagram turns into a useful asset, a robust ally within the often-frustrating world of computerized transmission restore. It represents the distinction between a technician who merely replaces components and one who actually understands the machine. An understanding that retains autos on the highway, and prospects happy.
Incessantly Requested Questions
The intricacies of computerized transmissions can seem daunting, particularly when encountering complicated schematics. This part addresses widespread questions surrounding the 4R70W valve physique diagram, aiming to make clear its goal and dispel potential confusion.
Query 1: Why is a diagram vital for diagnosing 4R70W transmission points?
Take into account a coronary heart surgeon getting ready for a posh bypass. Would the surgeon proceed with no detailed map of the coronary arteries? Equally, the 4R70W valve physique diagram gives a significant roadmap to the transmission’s hydraulic system. It permits technicians to hint fluid pathways, establish valves and solenoids, and perceive their interactions. With out this detailed schematic, diagnosing transmission issues turns into akin to navigating a maze blindfolded, counting on guesswork as a substitute of knowledgeable evaluation.
Query 2: Can a non-professional successfully use the 4R70W valve physique diagram?
Think about offering a novice pilot with the flight controls of a Boeing 747 accompanied by the plane’s schematics. Whereas the pilot might grasp the elemental ideas of flight, translating that information into sensible management of the plane requires intensive coaching and expertise. Equally, understanding the 4R70W valve physique diagram requires a basis in hydraulic ideas and transmission operation. Whereas a mechanically inclined particular person might acquire some perception from the diagram, correct prognosis and restore usually necessitate skilled experience.
Query 3: What are the commonest misinterpretations of the 4R70W valve physique diagram?
Image a cartographer mistakenly conflating contour strains with rivers on a topographical map. Such a misinterpretation may result in vital errors in terrain evaluation. Equally, a typical error entails complicated the symbols representing totally different valves and solenoids on the 4R70W valve physique diagram. Mistaking a strain regulator valve for a shift solenoid, for example, can result in incorrect prognosis and the substitute of functioning elements.
Query 4: How does the diagram account for variations in 4R70W transmissions throughout totally different mannequin years?
Envision an archaeologist making an attempt to suit artifacts from totally different historic durations right into a single, unified narrative. Such an effort would inevitably end in inaccuracies and distortions. Equally, it is essential to acknowledge that the 4R70W transmission underwent revisions all through its manufacturing run. Whereas the elemental ideas stay constant, refined variations in valve physique design and part placement might exist. It’s crucial to make use of the proper diagram equivalent to the particular mannequin 12 months of the transmission being serviced.
Query 5: What instruments are required along side the diagram for efficient troubleshooting?
A talented musician requires greater than only a musical rating to create compelling music; in addition they want an instrument. Equally, the 4R70W valve physique diagram is handiest when used along side applicable diagnostic instruments. A strain gauge, for example, permits technicians to measure hydraulic strain at varied factors inside the transmission, verifying correct operation. A multimeter is used to check solenoids and wiring harnesses. These instruments, coupled with the data offered by the diagram, facilitate correct and environment friendly troubleshooting.
Query 6: Can the diagram be used to establish modifications or upgrades to the valve physique?
Take into account an artwork restorer analyzing a portray that has been altered over time. The restorer should be capable to distinguish the unique brushstrokes from subsequent additions or modifications. Equally, the 4R70W valve physique diagram can help in figuring out modifications or upgrades to the valve physique. By evaluating the precise valve physique to the diagram, technicians can detect aftermarket elements, akin to shift kits or modified valves. This information is essential for understanding the transmission’s efficiency traits and diagnosing potential issues associated to those modifications.
In essence, the 4R70W valve physique diagram stands as a useful useful resource for understanding, diagnosing, and sustaining this complicated computerized transmission. An intensive grasp of the diagram’s intricacies transforms the troubleshooting course of from a guessing recreation into a scientific and knowledgeable strategy.
This concludes the regularly requested questions. The following part will discover widespread issues related to the 4R70W valve physique and their corresponding diagnostic procedures.
Important Insights for Diagnosing with the 4R70W Valve Physique Diagram
Throughout the world of automotive mechanics, the 4R70W computerized transmission stands as a intricate and sophisticated system. Mastering its intricacies calls for extra than simply technical ability; it requires a deep understanding of its internal workings, that are finest revealed by means of the valve physique diagram. The next insights have been gleaned from years of expertise, providing a pathway to extra environment friendly and correct diagnoses.
Tip 1: Deal with Every Diagram as Distinctive: Every 4R70W transmission, whereas sharing a typical lineage, can exhibit refined variations relying on its mannequin 12 months and particular utility. Seek the advice of the producer’s service handbook to make sure the usage of the suitable valve physique diagram. A mismatch can result in misdiagnosis and wasted effort.
Tip 2: Prioritize Cleanliness: Earlier than embarking on any valve physique inspection or restore, meticulously clear the work space and elements. Even minuscule particles can impede valve motion and compromise hydraulic integrity. A spotless atmosphere is paramount for correct assessments.
Tip 3: Hint Fluid Pathways Methodically: The 4R70W valve physique diagram is a map of hydraulic circuits. When troubleshooting a particular challenge, rigorously hint the related fluid pathways, figuring out all valves, solenoids, and orifices concerned. This course of exposes potential blockages, leaks, or malfunctioning elements.
Tip 4: Leverage Stress Testing Ports: The diagram highlights the situation of strain testing ports all through the valve physique. Make the most of these ports to measure hydraulic strain at crucial factors within the system. Discrepancies between measured values and specs can reveal underlying issues. In some eventualities, the strain testing port can supply extra info than a visible inspection.
Tip 5: Visually Examine Valve Motion: Take away valves rigorously and examine for indicators of damage, scoring, or sticking. A magnifying glass can help in detecting refined imperfections that will impede easy operation. Be sure that valves transfer freely inside their bores.
Tip 6: Ohm Check Solenoids for Continuity: Make use of a multimeter to measure the resistance of every solenoid. Deviations from the desired resistance vary point out a defective solenoid that requires substitute. Continuity testing saves money and time related to solenoid substitute. Testing additionally reveals points with the wiring harness that’s linked to the solenoids.
Tip 7: Doc All Findings: Preserve an in depth document of all observations, measurements, and repairs carried out in the course of the diagnostic course of. This documentation will show invaluable for future reference and troubleshooting efforts.
Tip 8: Change All Seals: When reassembling the valve physique, at all times substitute all seals and gaskets. Worn or hardened seals can compromise hydraulic integrity, resulting in leaks and efficiency points. Previous seals are brittle and might crack or tear simply. A valve physique is not going to carry out to specification if the seals are unhealthy.
By heeding these insights, the technician transforms from a mere components changer to a talented diagnostician, able to navigating the complexities of the 4R70W transmission with confidence and precision. The following pointers signify sensible recommendation that interprets into saved time and decreased dangers.
The previous factors function an important information for reaching experience in computerized transmission upkeep. This text will conclude by providing a glimpse into the longer term developments within the subject.
Conclusion
The narrative surrounding the 4R70W computerized transmission’s management unit schematic has been explored. From its function in hydraulic circuit comprehension to its pivotal perform in correct valve identification, solenoid placement, and fluid pathway evaluation, the doc emerges as an indispensable device. Stress regulation, part interplay, and environment friendly troubleshooting are all considerably enhanced by a complete understanding of its intricacies. The diagram, subsequently, transcends a mere assortment of strains and symbols; it turns into a conduit to mastery of a posh system.
Take into account a seasoned mechanic, tracing a phantom shift challenge by means of the labyrinthine passages, guided solely by the diagram, in the end revealing a minuscule obstruction inflicting untold operational anomalies. This situation underscores the diagram’s potent function. Its significance persists, demanding steady research and refinement of diagnostic methods. As transmission expertise progresses, the elemental ideas embedded inside the management unit schematic will proceed to function a basis for future improvements and diagnostic methodologies, urging professionals to delve deeper into the mechanical language it so eloquently conveys.
