Line Pressure Test

LINE PRESSURE TEST

TOOLS REQUIRED
- SA9127E Gauge Bar Set

CAUTION: KEEP BRAKES APPLIED AT ALL TIMES IN ORDER TO PREVENT UNEXPECTED VEHICLE MOTION.

NOTICE: Total test running time should not be longer than two minutes. Otherwise, transmission damage could occur.

Line pressures are calibrated for two sets of gear ranges -Drive-Park-Neutral and Reverse. This allows transaxle line pressure to be appropriate for different pressure needs in different gear ranges:

IMPORTANT: The Scan tool is only able to control the pressure control (PC) solenoid in Park and Neutral with vehicle stopped. This protects transaxle clutches from extremely high or low pressure in Drive or Reverse ranges.

Before performing a line pressure check, verify pressure control solenoid is receiving correct electrical signal from the PCM:





1. Hook up Scan tool.
2. Start engine and set parking brake.
3. Check for stored diagnostic trouble codes. including the diagnostic code for a pressure control solenoid.
4. Repair vehicle if necessary. Include the following areas:
- Inspect fluid level.
- Inspect manual linkage at transaxle.
- Install or connect Scan tool.

5. Remove the line pressure tap plug and install SA9127E to transaxle.
6. Put gear selector in Park and set parking brake.
7. Start engine and allow engine to warm up at idle.
8. Access PC Solenoid Control test on Scan tool.
9. Increase PC solenoid amperage in 0.1 amp increments. Read and record corresponding line pressure on pressure gauge. Allow pressure to stabilize for five seconds after each current change.

IMPORTANT: Before reinstalling the line pressure tap plug, apply Loctite Threadlocker 24200 to the thread of the plug.

10. Remove Gauge Teal Act SA9127E and install the line pressure tap plug.

IMPORTANT: The pressures in the table assume a temperature of 70°C (150°F). lathe pressure will vary at different temperatures.





11. Compare your data to the line pressure table.