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Fluid Pressure Check (Main Pressure in Bar)
– AR 25/35
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With engine idling
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Selector lever position
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20 SE X 20 SE
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X 20 XEV, Y 22 XE, Z 22 XE
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25 DT X 25 DT
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X 25 XE, Y 26 SE, X 30 XE, Y 32 SE
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Pressure regulator curr. consumpt.: 970 mA
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in "D" (Winter driving program)
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3.1 – 3.5
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3.1 – 3.5
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3.1 – 3.5
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3.1 – 3.5
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in "R"
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4.2 – 4.8
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4.2 – 4.8
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4.0 – 4.6
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3.8 – 4.4
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If TECH 1 or TECH 2 diagnostic unit is available, the current
consumption of the electro-hydraulic pressure regulator can be
checked. The limiting values for the main pressure are calculated
for the current consumption of the pressure regulator solenoid
valve given in the table.
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With engine idling
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Selector lever position
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Y 25 DT
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in "D"
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3.3 – 4.8
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in "R"
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3.1 – 5.1
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At stall speed (checking duration not over 10 sec.)
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Selector lever position
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20 SE X 20 SE
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X 20 XEV, Y 22 XE, Z 22 XE
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25 DT X 25 DT
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X 25 XE, Y 26 SE, X 30 XE, Y 32 SE
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Pressure regulator curr. consumpt.: 150 mA
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in "D", "3" "2" and "1"
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9.6 – 10.3
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9.6 – 10.3
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10.7 – 11.4
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10.0 – 10.7
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in "R"
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13.0 – 13.8
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13.0 – 13.8
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13.8 – 14.7
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12.3 – 13.1
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When repeating the test (stall speed) a pause must be made to
allow the transmission to cool down. The stall speed is the maximum
engine speed with gear selected and fully braked vehicle. Select
gear, firmly actuate service and parking brake and keep accelerator
pedal depressed for max. 10 seconds. Do not exceed this time period
as the transmission heats up very rapidly during this test. When
repeating the test a pause must be made to allow the transmission
to cool down.
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At stall speed
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Selector lever position
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Y 25 DT
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(Test not longer than 10 seconds)
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in "D", "4", "3" and "2"
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11.4 – 13.4
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in "R"
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15.0 – 18.0
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