Line Pressure Test: Notes

WARNING: This page is about a different car, the 2002 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.

Engine idling.
1. Perform mechanical system test preparation. See MECHANICAL SYSTEM TEST PREPARATION .
  WARNING:
  - Removing the square-head plug when the ATF is hot can be dangerous. Hot ATF can come out of the opening and badly burn. Before removing the square-head plug, allow the ATF to cool.
2. Remove the square head plug shown in the figure.
  
  Fig 1: Removing Square Head Plug
  Courtesy of MAZDA MOTORS CORP.
3. Connect the SSTs (49 H019 002, 49 B019 901, and 49 0378 400B) to the line pressure inspection port.
  
  Fig 2: Connecting SST's To Line Pressure Inspection Port
  Courtesy of MAZDA MOTORS CORP.
4. Start the engine.
5. Shift the selector lever to D range and read the line pressure at idle.
  ATF Temperature
  
  60-70 °C {140-158 °F} Turn Off All Electrical Loads
  
  Fig 3: Position Ranges & Line Pressure Specifications - Idle
  Courtesy of MAZDA MOTORS CORP.
6. Turn the engine off.
Engine stall speed.
CAUTION:
- Perform the line pressure test at engine idling prior to performing the test at engine stall. If line pressure is low at idle, do not perform the test at engine stall or further transaxle damage will occur.
1. Replace the SST (49 B019 901) to the 49 B019902.
2. Start the engine.
  CAUTION:
  - Do not maintain WOT in any gear range for more than 5 seconds or transaxle damage will occur.
3. Firmly depress the brake pedal with the left foot, and then gradually depress the accelerator pedal to floor (WOT) with the right.
4. When the engine speed no longer increases, quickly read the line pressure and release the accelerator.
5. Shift the selector to N position and let the engine idle for 1 minute or more to cool the ATF.
6. Read the line pressure at idle and at the engine stall speed for the remaining ranges in the same manner.
  1. 2 range
  2. 1 range
  3. R position
    ATF Temperature
    
    60-70 °C {140-158 °F} Turn Off All Electrical Loads
    
    Fig 4: Position Ranges & Line Pressure Specifications - Stall
    Courtesy of MAZDA MOTORS CORP.
7. Shift the selector lever to P position.
8. Turn off the engine.
9. Remove the SSTs and install a new square head plug in the line pressure inspection port.
  Tightening Torque
  
  5.0-9.8 N.m {50-110 kgf.cm, 44-86 in.lbf}