Line Pressure Test
DESCRIPTIONIf the clutch or the brake band shows a sign of slippage or shifting sensation is not correct, the line pressure should be checked.
- Excessive shocks during upshifting or shifting takes place at a higher point than under normal circumstances, may be due to the line pressure being too high.
- Slippage or inability to operate the car may, in most cases, be due to loss of oil pressure for the operation of the clutch, brake band or control valve.
1. Line pressure measurement (under no load)
a. Before measuring line pressure, jack-up all wheels.
b. Maintain temperature of ATF at approximately 60 to 80°C (140 to 176°F) during measurement. (ATF will reach the above temperature after idling the engine for approximately 30 minutes with shift lever in "N" or "P".)
2. Line pressure measurement (under heavy load)
a. Before measuring line pressure, apply both foot and parking brakes with all wheels chocked (Same as for "stall" test conditions).
b. Measure line pressure when selector lever is in "R", "D", "2" and "1" with engine under stall conditions.
c. Measure line pressure within 5 seconds after shifting the selector lever to each position. (If line pressure needs to be measured again, allow the engine to idle and then stop. Wait for at least one minute before measurement.)
d. Maintain the temperature of ATF at approximately 60 to 80°C (140 to 176°F) during measurement. (ATF will reach the above temperature after idling the engine for approximately 30 minutes with the selector lever in "N" or "P".)
TEST METHODS
1. Temporarily attach the OIL PRESSURE GAUGE assembly (498575400) to a suitable place in the driver's compartment.
2. Remove the test plug and install the OIL PRESSURE GAUGE ADAPTER (498897200) instead.
3. Connect the OIL PRESSURE GAUGE ADAPTER (498897200) with OIL PRESSURE GAUGE ASSEMBLY (498575400).
4. Check line pressure in accordance with the chart.
Under no load "P","R","D","3","2","1"
Under full load "R","D","3","2","1"
(With engine running at stall speed)