Line Pressure Test

Perform the mechanical system test preparation. (Refer to MECHANICAL SYSTEM TEST PREPARATION .)
Remove the front under cover No. 2. (Refer to FRONT UNDER COVER No. 2 REMOVAL/INSTALLATION .)
Disconnect the wiring harness clips from the harness bracket.

Fig 1: Disconnecting Wiring Harness Clips From Harness Bracket
Courtesy of MAZDA MOTORS CORP.
Remove the front splash shield. (LH) (Refer to FRONT SPLASH SHIELD REMOVAL/INSTALLATION .)
Remove the harness bracket installation bolts from the transaxle and set it aside.

Fig 2: Removing Harness Bracket Installation Bolts From Transaxle
Courtesy of MAZDA MOTORS CORP.
Remove the pressure detection square head plug.

Fig 3: Removing Pressure Detection Square Head Plug
Courtesy of MAZDA MOTORS CORP.
WARNING:
- Do not remove the square head plug when the ATF temperature is high. Otherwise, ATF could overflow and cause severe burns or serious injury. Remove the square head plug when the transaxle and ATF temperatures are low.
NOTE:
- Use a suitable oil pressure gauge that corresponds to the line pressure because the maximum scale value differs depending on the oil pressure gauge.
Install SSTs (49 D019 908, 49 D019 909, 49 D019 910, 49 D019 911, 49 D019 913) to the line pressure detection port as shown in the figure.

Fig 4: Installing SST To Line Pressure Detection Port
Courtesy of MAZDA MOTORS CORP.
Start the engine.
Warm up the engine until the ATF temperature is 60-70 °C {140-158 °F}.
Shift the selector lever to the D position.
Measure the line pressure while idling in D position.
Measure the line pressures while idling in the M (1st gear) and R positions using the same procedure.
Stop the engine.
Change the low-pressure gauge (49 D019 908) to the high-pressure gauge (49 D019 907).

Fig 5: Identifying Low-Pressure Gauge (49 D019 908) To High-Pressure Gauge (49 D019 907)
Courtesy of MAZDA MOTORS CORP.
Start the engine.
Measure the line pressure while stalling in D position.
1. Strongly depress the brake pedal with the left foot.
2. Shift the selector lever to the D position.
  CAUTION:
  - To prevent damage to the transaxle, measure the line pressure while stalling (Step (3)-(4)) within 5 s.
3. Slowly depress the accelerator pedal fully with the right foot all the way down.
4. Read the line pressure quickly while stalling, and remove the right foot from the accelerator pedal.
5. Shift the selector lever to the N position and idle for 1 min or more.

Measure the line pressure while stalling for positions other than D in the same procedure.

If there is any malfunction, one of the following causes may have occurred:

Condition		Possible cause
Lower than specification	Lower in R, D, and M (1GR) position	Oil pump wear ATF leakage from oil pump, control valve body, and transaxle case Pressure regulator valve sticking Pressure control solenoid malfunction Solenoid reducing valve sticking
	Lower in D and M (1GR) position	ATF leakage from low clutch hydraulic circuit
	Lower in R and M (1GR) position	ATF leakage from low and reverse brake hydraulic circuit
	Lower in R position	ATF leakage from R-3-5 brake hydraulic circuit
Higher than specification	Higher in R, D, and M (1GR) position	Pressure regulator valve sticking Pressure control solenoid malfunction

Line pressure

Measurement conditions		Specification (kPa {kgf/cm² , psi})
Idling	R position	500-700 {5.10-7.13, 72.6-101.0}
Idling	D and M (1GR) position	330-470 {3.37-4.79, 47.9-68.1}
Stalling	R position	1, 790-2, 100 {18.26-21.41, 259.7-304.5}
Stalling	D and M (1GR) position	970-1, 170 {9.90-11.93, 141.0-169.6}

Stop the engine.
Remove the SSTs.
WARNING:
- If the SST is removed when the ATF temperature is high, ATF could overflow and cause severe burns or serious injury. Remove the SST when the transaxle and ATF temperatures are low.
Install a new square head plug.

Fig 6: Installing Square Head Plug
Courtesy of MAZDA MOTORS CORP.
NOTE:
- Do not reuse the square head plug because a sealant coating has been applied.
Tightening torque
- 7.2-9.8 N.m {74-99 kgf.cm, 64-86 in.lbf}
Tighten the harness bracket installation bolts in the order shown in the figure.

Fig 7: Harness Bracket Installation Bolts Tightening Sequence
Courtesy of MAZDA MOTORS CORP.

Tightening torque
- 8-10 N.m {82-101 kgf.cm, 71-88 in.lbf}
Install the front splash shield. (LH) (Refer to FRONT SPLASH SHIELD REMOVAL/INSTALLATION .)
Connect the wiring harness clips to the harness bracket.

Fig 8: Connecting Wiring Harness Clips To Harness Bracket
Courtesy of MAZDA MOTORS CORP.
Install the front under cover No. 2. (Refer to FRONT UNDER COVER No. 2 REMOVAL/INSTALLATION .)