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TM-60 < DTC/CIRCUIT DIAGNOSIS > P0731 1GR INCORRECT RATIO P0731 1GR INCORRECT RATIO Description INFOID:0000000006159289 This malfunction is detected when the A/T does not shift into 1GR position as instructed by TCM. This is not only caused by electrical malfunction (circuits open or shorted) but also by mechanical malfunction such as control valve sticking, improper solenoid valve operation. On Board Diagnosis Logic INFOID:0000000006159290 • This is an OBD-II self-diagnostic item. • Diagnostic trouble code “P0731” with CONSULT-III or 18th judgment flicker without CONSULT-III is detected when TCM detects any inconsistency in the actual gear ratio. Possible Cause INFOID:0000000006159291 • Harness or connectors (Solenoid circuits are open or shorted.) • Input clutch solenoid valve • Front brake solenoid valve • Direct clutch solenoid valve • High and low reverse clutch solenoid valve • Each clutch • Hydraulic control circuit DTC Confirmation Procedure INFOID:0000000006159292 CAUTION: Always drive vehicle at a safe speed. NOTE: If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch OFF and wait at least 10 seconds before performing the next test. After the repair, perform the following procedure to confirm the malfunction is eliminated. WITH CONSULT-III 1. Start the engine and select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III. 2. Make sure that “ATF TEMP 1” is within the following range. ATF TEMP 1: 20 °C – 140°C If out of range, drive vehicle to warm ATF or stop engine to cool ATF. 3. Select “1ST GR FNCTN P0731” of “DTC & SRT CONFIRMATION” mode for “TRANSMISSION” with CONSULT-III. 4. Drive vehicle and maintain the following conditions. Floor shift models: SLCT LVR POSI: “1” position GEAR: “1” position ACCELE POSI: 0.6/8 or more VEHICLE SPEED: 10 km/h (6 MPH) or more ENGINE SPEED: INPUT SPEED − 50 rpm or more INPUT SPEED: 300 rpm or more Column shift models: MANU MODE SW: ON GEAR: “1” position ACCELE POSI: 0.6/8 or more VEHICLE SPEED: 10 km/h (6 MPH) or more ENGINE SPEED: INPUT SPEED − 50 rpm or more INPUT SPEED: 300 rpm or more 5. Keep the current driving status for at least 5 consecutive seconds if CONSULT-III screen changes from “OUT OF CONDITION” to “TESTING”. CAUTION: If “TESTING” does not appear on CONSULT-III for a long time, select “SELF-DIAG RESULTS”. In case a 1st trip DTC other than P0731 is shown, refer to “ ”. |