Line Pressure Test

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 you. Before removing the square-head plug, allow the ATF to cool.
2. Connect the SSTs  (49 0378 400C, 49 B019 901B and 49 H019 002) to the line pressure inspection port.
3. Start the engine and shift the selector lever to D range and read the line pressure at idle.
   WARNING:

   • Removing the SST when the ATF is hot can be dangerous. Hot ATF can come out of the opening and badly burn you. Before removing the SST, allow the ATF to cool.
     Fig 1: Connecting SSTs To Line Pressure Inspection Port

     Courtesy of MAZDA MOTORS CORP.
4. Turn the engine off and remove the SST  (49 B019 901B), and replace the gauge part of the SST  (49 0378 400C).
   CAUTION:

   • Do not maintain WOT in any position/range for more than 5 seconds, or transaxle damage will occur.
5. Start the engine and firmly depress the brake pedal with the left foot, and then depress the accelerator pedal to floor (WOT) with the right.
6. When the engine speed no longer increases, quickly read the line pressure and release the accelerator pedal.
7. Shift the selector lever to N position and let the engine idle for 1 minute  or more to cool the ATF.
8. Read the line pressure at idle and at the engine stall speed for the M (1GR, 2GR) range and R position in the same manner.

   Line pressure specification 

   LINE PRESSURE SPECIFICATION
   
   

   Position/range	Line pressure (kPa {kgf/cm2 , psi})
   	Idle	Stall
   D, M (1GR, 2GR)	330-470 {3.4-4.8, 48-68}	1,200-1,320 {12.2-13.5, 174-191}
   R	490-710 {5.0-7.2, 71-102}	1,680-2,010 {17.2-20.4, 244-291}

9. Shift the selector lever to P position and turn off the engine.
   WARNING:

   • Removing the SST when the ATF is hot can be dangerous. Hot ATF can come out of the opening and badly burn you. Before removing the SST, allow the ATF to cool.
10. Remove the SST  .
11. Install a new square head plug in the inspection port.

    Tightening torque 

    4.8-9.8 N.m {49-99 kgf.cm, 43-85 in.lbf} 

Evaluation of line pressure test