Editing Torque converter lock up control 700R4
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− | + | =Converter lock up wiring= | |
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− | If you do not understand basic wiring, get help from someone | + | ==Basic wire diagram== |
+ | This is a simple 12 volt circuit. I consists of 12 volts to the solenoid and a ground to complete the circuit. | ||
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+ | When the brakes are applied the relay switches to pin 87 and the circuit is broken, thus unlocking the torque converter. A common Bosch relay used. | ||
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+ | If you do not understand basic wiring, get some help from someone with transmission/automotive wire knowledge. | ||
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+ | [[Image:Diagram_no_tow.jpg|border|400px]] <br style="clear:both"/> | ||
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==Pressure switches== | ==Pressure switches== | ||
− | Notice these pressure switches are silver in color. This means they are NO = Normally Open. When pressure is applied, the switch closes the internal contacts to complete the circuit. | + | Notice these pressure switches are silver in color. This means they are NO = Normally Open. When pressure is applied, the switch closes the internal contacts to complete the circuit. All of these pressure switches are of an "on-off" design. Pressure turns them "on", no pressure turns them "off". |
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− | + | The pressure switch with 1 pole is self-grounding. This means the wire you hook to it is going to be grounded when pressure is applied to the switch. | |
+ | Pressure switch with two post connectors. This routes the 12 volt power through the switch to a single wire lock up solenoid. | ||
{| | {| | ||
− | |[[Image:700_pressure_switches.jpg|thumb|350px|left | + | |[[Image:700_pressure_switches.jpg|thumb|350px|left]] |
− | |[[image:700_connectors.jpg|thumb|400px|left | + | |[[image:700_connectors.jpg|thumb|400px|left]] |
|} | |} | ||
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==Lock up solenoids== | ==Lock up solenoids== | ||
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*1 wire solenoid, early design | *1 wire solenoid, early design | ||
− | * | + | *more common 2-wire solenoid late design |
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+ | Solenoid on the left has 1 red wire. This is a self-grounding lock up solenoid. The 2-wire solenoid has a red wire and a black wire. Red is for 12 volts, black is for ground. | ||
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+ | [[image:700_solenoid_wires.jpg|thumb|400px|left]]<br style="clear:both"/> | ||
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==Valve body location for switch== | ==Valve body location for switch== | ||
− | + | Location for pressure switch on valve body for 4th gear lockup only of the torque converter clutch (TCC). This location has pressure when the transmission is in 4th gear. | |
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+ | [[Image:700_v-body_switch.jpg]] | ||
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− | + | [[Category:Transmission]] | |
− | + | [[Category:Good articles]] | |
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