Line Pressure Test

1. Perform mechanical system test preparation. (See MECHANICAL SYSTEM TEST PREPARATION .)
   WARNING:

   • Removing the 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. Remove the plug and O-ring shown in the figure.
   Fig 1: Identifying Line Pressure Inspection Port (1 Of 2)

   Courtesy of MAZDA MOTORS CORP.
   Fig 2: Identifying Line Pressure Inspection Port (2 Of 2)

   Courtesy of MAZDA MOTORS CORP.
3. Connect the SSTs  (49 UN01 1610, 49 B019 901B, and 49 0378 400C) to the low clutch pressure inspection port (D, 3, and 2 range line pressures) or reverse clutch pressure inspection port (R position line pressure).
Fig 3: Connecting SSTs To Low Clutch Pressure Inspection Port
Courtesy of MAZDA MOTORS CORP.
4. Start the engine and warm it up until the ATF  reaches 60-70 °C {140-158 °F}.
5. Shift the selector lever to D range.
6. Read the line pressure at idle for the remaining ranges in the same manner.
   • 3 range
   • 2 range
   • R position

   ATF temperature 

   60-70 °C {140-158 °F} 

   Turn off all electrical loads 

   ATF TEMPERATURE SPECIFICATIONS
   
   

   Position/Range	Line pressure (kPa {kgf/cm2 , psi})
   	Idle
   D, 3	290-490 {3.0-5.0, 42-71}
   2, R	550-750 {5.6-7.6, 80-109}

7. Turn the engine off.

1. Replace the SST  (49 B019 901B) with the gauge of the SST  (49 0378 400C).
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 the floor (WOT) with the right.
4. When the engine speed no longer increases, quickly read the line pressure and release the accelerator pedal.
5. Shift the selector lever to N position and let the engine idle for 1 minute or more to cool the ATF.
6. Read the line pressure at the engine stall speed for the remaining ranges in the same manner.
   • 3 range
   • 2 range
   • R position

   ATF temperature 

   60-70 °C {140-158 °F} 

   Turn off all electrical loads 

   ATF TEMPERATURE SPECIFICATIONS
   
   

   Position/Range	Line pressure (kPa {kgf/cm2 , psi})
   	Stall
   D, 3	1,280-1,480 {13.1-15.1, 186-215}
   2, R	1,550-1,750 {15.8-17.8, 225-254}

7. Shift the selector lever to P position.
8. Turn off the engine.
9. Remove the SSTs  and install a new square head plug and O-ring in the line pressure inspection port.

Tightening torque 

4.91-9.80 N.m {50-100 kgf.cm, 43.4-86.7 in.lbf}