Line Pressure Chart

Fig 1: Locating Transmission Fluid Drain Plug And Line Pressure Tap

Courtesy of MAZDA MOTORS CORP.

1	Line Pressure tap
2	Transmission fluid drain plug

LINE PRESSURE CHART

Gear	Line
Pressures at Idle
P	338-379 kPa (49-55 psi)
R	621-689 kPa (90-100 psi)
N	338-379 kPa (49-55 psi)
D	338-379 kPa (49-55 psi)
L	338-379 kPa (49-55 psi)
Pressure at Wide Open Throttle (WOT) Stall
P	338-379 kPa (49-55 psi)
R	1,868-2,068 kPa (271-300 psi)
N	338-379 kPa (49-55 psi)
D	1,868-2,068 kPa (271-300 psi)
L	1,868-2,068 kPa (271-300 psi)
^a All pressures are approximate.

3. If the line pressure is not within specification, go to PINPOINT TEST 1: TRANSAXLE CONTROL SOLENOIDS to diagnose the line pressure control (LPC) operation. If LPC operation is OK, see LINE PRESSURE CHART above for line pressure concern causes.

4. Once Line Pressure Test is complete, install the line pressure tap plug.

Tighten to 9 N.m {0.9 kgf.m, 80 in.lbf}.

LINE PRESSURE TEST RESULT

Test Results	Possible Source
HIGH at IDLE - ALL RANGES	Wiring harnesses LPC solenoid Main regulator valve
LOW at IDLE - ALL RANGES	Low transmission fluid level Fluid inlet filter/seal Main control body Cross leaks Gaskets Pump Separator plate
LOW in Park ONLY	Valve body
LOW in Reverse ONLY	Separator plate Reverse clutch Valve body Forward clutch
LOW in Neutral ONLY	Valve body
LOW in Overdrive ONLY	Forward clutch Valve body
LOW in Drive ONLY	Forward clutch
LOW in Manual 1st ONLY	Forward clutch Valve body