Diagnostic Procedure
NO. 1: CHECK ANY OTHER DTC (BESIDES DTC P0740) ON DISPLAY
Is there any other DTC on display?
- Yes: Inspect relevant DTC.
- No: Go to next step.
NO. 2: CHECK DUTY SOLENOID B CIRCUIT
Check duty solenoid B circuit.
Is there any trouble in duty solenoid B circuit?
- Yes: Repair or replace duty solenoid B circuit.
- No: Go to next step.
NO. 3: CHECK THROTTLE POSITION SENSOR CIRCUIT
Check throttle position sensor circuit.
Is there any trouble in throttle position sensor circuit?
- Yes: Repair or replace throttle position sensor circuit.
- No: Go to next step.
NO. 4: CHECK VEHICLE SPEED SENSOR 1 CIRCUIT
Check vehicle speed sensor 1 circuit.
Is there any trouble in vehicle speed sensor 1 circuit?
- Yes: Repair or replace vehicle speed sensor 1 circuit.
- No: Go to next step.
NO. 5: CHECK VEHICLE SPEED SENSOR 2 CIRCUIT
Check vehicle speed sensor 2 circuit.
Is there any trouble in vehicle speed sensor 2 circuit?
- Yes: Repair or replace vehicle speed sensor 2 circuit.
- No: Go to next step.
NO. 6: CHECK ENGINE SPEED INPUT CIRCUIT
Check engine speed input circuit.
Is there any trouble in engine speed input circuit?
- Yes: Repair or replace engine speed input circuit.
- No: Go to next step.
NO. 7: CHECK INHIBITOR SWITCH CIRCUIT
Check inhibitor switch circuit.
Is there any trouble in inhibitor switch circuit?
- Yes: Repair or replace inhibitor switch circuit.
- No: Go to next step.
NO. 8: CHECK BRAKE LIGHT SWITCH CIRCUIT
Check brake light switch circuit.
Is there any trouble in brake light switch circuit?
- Yes: Repair or replace brake light switch circuit.
- No: Go to next step.
NO. 9: CHECK ATF TEMPERATURE SENSOR CIRCUIT
Check ATF temperature sensor circuit.
Is there any trouble in ATF temperature sensor circuit?
- Yes: Repair or replace ATF temperature sensor circuit.
- No: Is there poor contact in TCM connector?
- Yes: Repair poor contact in TCM connector.
- No: Is there any mechanical trouble in automatic transmission?
- Yes: Repair or replace automatic transmission.
- No: Replace TCM.