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7A2-52 TRANSMISSION CONTROL SYSTEM (JR405E) DTC P0731, P0732, P0733 or P0734 (Flash Code 41, 42, 43 or 44) Circuit Description The TCM calculates the gear ratio based on the input Condition for Running the DTC • Other than DTCs P0731, P0732, P0733 and P0734 are not set. • The ignition switch is ON. • The transmission fluid temperature is more than 60 °C (140°F). • The input shaft speed is more than 1000 RPM. • The vehicle speed is more than 10 km/h (6 MPH). • The selector lever is forward range for longer than 2 seconds. • The TCM is not under gearshift control. Condition for Setting the DTC • The TCM detects that the output shaft speed is more than 500 RPM over the calculated speed Action Taken When the DTC Sets • The TCM blinks the Check Trans lamp on the second consecutive driving cycle when the Condition for Clearing the DTC • The TCM turns OFF the Check Trans lamp when the diagnostic runs and does not fail. • A current DTC clears when the diagnostic runs and does not fail. Diagnostic Aids • If an intermittent condition is suspected, refer to Intermittent Conditions in this section. • Electromagnetic interference in the ISS sensor or OSS sensor circuits may set this DTC. • An intermittent ISS sensor or OSS sensor signal pulse may set this DTC. • Ensure the ISS sensor and OSS sensor is tight. • Use the Clutch, Brake, Solenoid and Pressure Switch Logic table to verify each component works • A transmission mechanical problem will cause this DTC to set. • Sticking or contamination of shift valves may cause intermittent incorrect gear ratios. • If multiple incorrect gear ratio codes are set, problem in fluid pressure, low ATF level, plugged Notice: • Each DTC agrees with the following gear positions. Schematic Reference: Transmission Controls Circuit/ System Testing DTC P0731, P0732, P0733 or P0734 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 Perform the ATF level check. Refer to repair Did you perform the ATF level check? — Go to Step 3 Go to Transmission Fluid Checking Procedure 3 1. Install a scan tool. 2. Turn OFF the ignition for 30 seconds. 3. Drive the vehicle while observing the DTC Is there any DTCs set other than P0731, P0732, — Refer to Applicable DTC Go to Step 4 |