P1731
P1731 A/T 1ST ENGINE BRAKINGDescription
Fail-safe function to prevent sudden decrease in speed by engine brake other than at M1 position.
DTC Logic
P1731:
DTC CONFIRMATION PROCEDURE
NOTE: If "DTC CONFIRMATION PROCEDURE" has been previously performed, always turn ignition switch OFF. Then wait at least 10 seconds before performing the next test.
1. CHECK DTC DETECTION
With CONSULT-III
1. Start the engine.
2. Select "Data Monitor" mode for "TRANSMISSION".
3. Drive vehicle and maintain the following conditions for at least 2 consecutive seconds.
ENGINE SPEED: 1,200 rpm
GEAR: "1" position
MANU MODE SW: ON
Is "P1731 A/T 1ST E/BRAKING" detected?
YES >> Go to "Diagnosis Procedure".
NO >> Check intermittent incident. Refer to GI-38, "Intermittent Incident". Service Information For Electrical Incident
Diagnosis Procedure
1. CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to TM-89, "Diagnosis Procedure". Main Power Supply and Ground Circuit
Is the inspection result normal?
YES >> Replace the control valve with TCM.
NO >> Repair or replace damaged parts.