626 LX L4-2.0L DOHC (1999)
COASTING CLUTCH HYDRAULIC CIRCUITS
The LA4A-EL transaxle has hydraulic circuits to control the apply and release of the coast clutch. The coasting clutch is applied under the following
conditions:
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D range/first, second and third gear (O/D OFF Switch ON)
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2 range/second and third gear
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1 range/first and second gear
The PCM controls the apply and release of the coasting clutch by changing the current to the 3-2 timing/coasting clutch solenoid. The result is that S3
hydraulic circuit pressure varies as follows:
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When the current is zero, S3 circuit pressure is too low to move the coast clutch valve, causing coasting clutch to apply.
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During fail-safe mode
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When the current is moderate-to-high, S3 circuit pressure is high enough to move the coasting clutch valve, causing coasting clutch to release.
The path of fluid under line pressure during the application of the coasting clutch is as follows:
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From the manual valve (D21 circuit), through the 3-4 shift valve, to the L123 circuit
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From the L123 circuit, through the coasting clutch valve, into the CCL circuit
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From the CCL circuit to the coasting clutch
When the coasting clutch valve moves to the release position, it blocks the Ll23 circuit and provides an exhaust path for the CCL circuit. In the D
range/fourth gear, the movement of the 3-4 shift valve exhausts the L123 circuit, regardless of coasting clutch valve position.
FLUID PASSAGE LOCATION DESCRIPTION