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Home >> Buick >> 1995 >> LeSabre Custom >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> ECM/Pcm Code Charts >> DTC P0740: Torque Converter Clutch >> Test Description
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Test Description

NOTE: Test numbers refer to numbers on diagnostic chart.
  1. Determines whether fault is caused by a bad solenoid or control circuit.
  2. Checks availability of battery voltage.
  3. Checks PCM's ability to pulse PWM solenoid on and off.
Fig 1: Code P0740 Schematic (3.8L) Torque Converter Clutch
G95A13839
Fig 2: Code P0740 Diagnostic Flow Chart (3.8L) Torque Converter Clutch
G95I13845
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