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Transmission Control System (Smoother) 7A-95 P0740 (Flash Code 67) Circuit Description • The ignition switch is ON. Condition for Setting the DTC • The TCM detects a high voltage condition on the lock up clutch solenoid valve control circuit when Action Taken When the DTC Sets • The TCM illuminates the transmission warning lamp when the diagnostic runs and fails. • The TCM inhibits gear select & shift position learning and half-clutch learning. Condition for Clearing the DTC • The TCM turns OFF the transmission warning lamp when the diagnostic runs and does not fail. • A current DTC clears when the diagnostic runs and does not fail. • A history DTC clears with the Tech 2 or reset switch operation. Diagnostic Aids • If an intermittent condition is suspected, refer to Intermittent Conditions in this section. • If this DTC is present, deteriorated vehicle starting feel will appear. DTC P0740 (Flash Code 67) Schematic Reference: Transmission Controls Step Action Value(s) Yes No 1 Did you perform the Diagnostic System Check - — Go to Step 2 Go to Diagnostic System Check - Transmission Controls 2 1. Install the Tech 2. Information with the Tech 2. Does the DTC fail this ignition? — Go to Step 3 Go to Diagnostic Aids 3 1. Turn OFF the ignition. 237) near the starter motor. 3. Connect a DMM between the control circuit of the lock up clutch solenoid valve harness (pin 4. Turn ON the ignition, with the engine OFF. Is the DMM voltage more than the specified value? 18.0 volts Go to Step 4 Go to Step 5 4 1. Connect a test lamp between the control circuit of the lock up clutch solenoid valve harness 2. Turn ON the ignition, with the engine OFF. Does the test lamp illuminate? — Go to Step 6 Go to Step 7 |