Line Pressure/EPC Pressure Test

CAUTION: Perform the line pressure test prior to performing the stall speed test. If the line pressure is low at stall, do not perform stall speed test or further transmission damage will occur. Do not maintain wide open throttle in any transmission range for more than five seconds.

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Part 2 Of 2:

This test verifies that the line pressure is within specification.

1. Connect pressure gauge to line pressure tap.





2. Start engine and check line pressures; refer to the Line Pressure Chart to determine if line pressure is within specification.
3. If line pressure is not within specification, check EPC pressure.
4. Connect pressure gauge to EPC pressure tap.
5. Restart engine and check EPC pressure; refer to Line Pressure Chart for specifications.





6. If EPC pressure is not within specification, perform Pinpoint Test E to diagnose EPC operation. If EPC operation is OK, refer to Line Pressure Diagnosis Chart for line pressure concern causes.