Line Pressure Test

WARNING: This page is about a different car, the 2004 Suzuki Vitara. However, it is still accessible from the selected car via links, so may be relevant.

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 to 80°C (158 to 176° F)).
Fluid is filled to proper level (between FULL HOT and LOW HOT on dipstick).
1. Apply parking brake securely and place checks against wheels.
2. Attach oil pressure gauge to fluid pressure check hole (1) in transmission case.
  CAUTION: After attaching oil pressure gauge, check that not fluid leakage exists.
  
  Special tool
  
  (A): 09925-37810
  
  Fig 1: Identifying Fluid Pressure Check Hole (1)
  Courtesy of SUZUKI OF AMERICA CORP.
3. Depress foot brake fully, run engine at idle and stall.
4. Check fluid pressure in "D" or "R" range within the following specification.
  CAUTION: Do not continue running engine at stall speed longer than 5 seconds.
  
  Line pressure for J20 engine model
  
  Fig 2: Line Pressure Chart For J20 Engine Model
  Courtesy of SUZUKI OF AMERICA CORP.
  
  Line pressure for H25 engine model
  
  Fig 3: Line Pressure Chart For H25 Engine Model
  Courtesy of SUZUKI OF AMERICA CORP.
5. If check result is OK, disconnect special tool, then tighten transmission case plug to specified torque.
  Tightening torque
  
  Transmission case plug: 17 N.m (1.7 kg-m, 12.0 lb-ft)
  
  Troubleshooting
  
  Fig 4: Line Pressure Test Troubleshooting Chart
  Courtesy of SUZUKI OF AMERICA CORP.