Line Pressure Test
Line Pressure TestCAUTION: Carry out Line Pressure Test before carrying out Stall Speed Test. If line pressure is low at stall, do not carry out stall test or further transaxle damage can occur. Do not maintain WOT in any gear range for more than 5 seconds.
CAUTION: The Transmission Tester must be removed from the transaxle and the vehicle harness connected to verify these pressures.
The Line Pressure Test verifies that the line pressure is within specifications.
1. Connect pressure gauge to line pressure tap.
Line Pressure Tap:
2. Start engine and check line pressures. Refer to the Line Pressure Chart to determine if line pressure is within specifications.
3. If line pressure is not within specifications, carry out on-board diagnostics and pinpoint test, air pressure check and repair main control system or pump as required. Reading and Clearing Diagnostic Trouble Codes CD4E Automatic Transmission
Line Pressure Chart (2.3L and 3.0L):
Line Pressure Diagnosis
If the line pressure is low at idle in all ranges check the following items:
^ Low fluid level
^ Restricted inlet filter
^ Loose main body
^ Solenoid body or accumulator body to case bolts
^ Excessive leakage in pump
^ Case
^ Control bodies
^ Sticking main regulator valve or damaged inlet tube seal on inlet filter
^ Damaged gaskets or separator plate
If the line pressure is high at idle in all ranges then check the following items:
^ Main regular valve
^ Solenoid body and wiring harness
^ Run Quick Test referred to in electrical diagnosis.