5A
Line Pressure Test
Purpose of this test is to check operating conditions of each part by measuring fluid pressure in fluid pressure line.
Line pressure test requires the following conditions.
• Automatic fluid is at normal operating temperature (70 – 80 °C / 158 – 176 °F).
• Fluid is replenished to proper level (between FULL and LOW on dipstick).
• Air conditioner switch is turned OFF.
1) Apply parking brake securely and place chocks against wheels.
2) Remove fluid pressure check hole plug bolt.
3) Attach oil pressure gauge to fluid pressure check hole in transmission case.
Special Tool
(A) : 09925–37811–001
CAUTION:
After attaching oil pressure gauge, check that no fluid leakage exists.
4) Depress foot brake fully, run engine at idle and stall then check fluid pressure in “D” or “R” range.
CAUTION:
• Do not continue running engine at stall speed longer than 5 seconds.
• After performing line pressure test, be sure to leave engine running at idle for longer than 1 minute before performing another line pressure test.
Automatic transmission line pressure
  “D” range “R” range
At idle speed 377 – 407 kPa, 55 – 59 psi 613 – 683 kPa, 89 – 99 psi
At stall speed 1213 – 1326 kPa, 176 – 192 psi 1620 – 1779 kPa, 235 – 258 psi
Troubleshooting
Condition Possible Cause Action
Higher than standard level in each range
Malfunction of pressure control solenoid valve (Low line pressure)
Inspect. If NG, replace valve body assembly.
Faulty valve body component
Replace valve body assembly.
Lower than standard level in each range
Malfunction of pressure control solenoid valve (Low line pressure)
Inspect. If NG, replace valve body assembly.
Faulty valve body component
Replace valve body assembly.
Clogged oil strainer
Replace.
Faulty oil pump
Inspect. If NG, replace.
Leakage from both “D” and “R” range fluid pressure circuit
Overhaul or replace valve body assembly.
Lower than standard level only in “D” range
Leakage from “D” range fluid pressure circuit
Overhaul or replace valve body assembly.
Lower than standard level only in “R” range
Leakage from “R” range fluid pressure circuit
Overhaul or replace valve body assembly.