Line Pressure Test

CAUTION: Carry out the Line Pressure Test prior to carrying out the Stall Speed Test. If the line pressure is low at stall, do not carry out Stall Speed Test or further transmission damage will occur. Do not maintain wide open throttle (WOT) in any transmission range for more than five seconds.

This test verifies that the line pressure is within specification.

Connect pressure gauge to line pressure tap.

Start engine and check line pressures. Refer to LINE PRESSURE DIAGNOSIS CHART to determine if line pressure is within specification.

LINE PRESSURE SPECIFICATION

Application	Range	Idle		WOT
Application	Range	EPC	Line Pressure	EPC	Line Pressure
All	P, N	0-138 kPa (0-20 psi)	207-448 kPa (30-65 psi)	N/A	N/A
	OD, 2, 1	138-345 kPa (20-50 psi)	345-758 kPa (50-110 psi)	655-793 kPa (95-115 psi)	1,310-1,586 kPa (190-230 psi)
	R	138-345 kPa (20-50 psi)	552-1034 kPa (80-150 psi)	552-655 kPa (80-95 psi)	1,379-1,931 kPa (200-280 psi)

Place the ignition switch in the OFF position. If line pressure is not within specification, check EPC pressure.
Connect pressure gauge to EPC pressure tap.
Start engine and check EPC pressure. Use the LINE PRESSURE SPECIFICATION .
If EPC pressure is not within specification, Go To PINPOINT TEST E: OUTPUT SHAFT SPEED (OSS) SENSORS to diagnose EPC operation. If EPC operation is OK, see the LINE PRESSURE DIAGNOSIS CHART for line pressure concern causes.