Line Pressure Test - Suzuki Swift Sport 2004 Service & Repair Manual

5A-32 Automatic Transmission/Transaxle:
Troubleshooting
Condition
→
"N" "D" time lag
exceeds specification
→
"R" time lag
"N"
exceeds specification

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 transaxle 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 one
minute before performing another line pressure test.
Automatic transaxle line pressure
At idle speed
At stall speed 12.1 – 13.4 kg/cm
Possible cause
Malfunction of transmission fluid
temperature sensor
Malfunction of pressure control solenoid
valve (Low line pressure)
Faulty valve body component
Clogged oil strainer
Faulty oil pump
Faulty forward clutch
Faulty one-way No.2 clutch
Leakage from "D" range fluid pressure
circuit
Malfunction of transmission fluid
temperature sensor
Malfunction of pressure control solenoid
valve (Low line pressure)
Faulty valve body component
Clogged oil strainer
Faulty oil pump
Faulty reverse clutch
Faulty 1st and reverse brake
Leakage from "R" range fluid pressure
circuit
"D" range
3.8 – 4.2 kg/cm 2 , 54 – 60psi
2 , 172 – 191 psi
Correction / Reference Item
Inspect. If NG, replace.
Inspect. If NG, replace valve body assembly.
Replace valve body assembly.
Replace.
Inspect. If NG, replace.
Inspect. If NG, replace.
Inspect. If NG, replace.
Replace valve body assembly.
Inspect. If NG, replace.
Inspect. If NG, replace valve body assembly.
Replace valve body assembly.
Replace.
Inspect. If NG, replace.
Inspect. If NG, replace.
Inspect. If NG, replace.
Replace valve body assembly.
"R" range
5.9 – 6.9 kg/cm 2 , 84 – 98 psi
16.8 – 19.5 kg/cm 2 , 239 – 277 psi
S7RS0B5104016