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Electrical Troubleshooting Troubleshooting Flowchart — Torque Converter Clutch (Lock-up Control) Solenoid Valve A • OBD II Scan Tool indicates Code P0743. • Self-diagnosis indicator light blinks once. Possible Cause • Disconnected torque converter clutch solenoid valve A connec- • Short or open in torque con- verter clutch solenoid valve A • Faulty torque converter clutch solenoid valve A • Open in VB SOL line Check for a Short to Power: 1. Turn the ignition switch OFF. 2. Disconnect the A (26P) and E (26P) connectors from the PCM. 3. Turn the ignition switch ON (II). the E13 and A26 terminals. Is there voltage? NO Repair short to power in the wire torque converter clutch solenoid Measure Torque Converter Clutch 1. Turn the ignition switch OFF. 2. Measure the resistance between the E13 and A26 ter- Is the resistance 12-25 ? NO Check for loose PCM connectors. To page Main Menu Table of Contents |