Code No.P1763 (P0713): A/T fluid temperature sensor system












OPERATION



  • The A/T fluid temperature sensor converts the A/T fluid temperature to voltage, and send the information to the ECU.
  • The A/T fluid temperature rises, the resistance decreases. Thus, the sensor output voltage depends on the A/T fluid temperature. As the A/T fluid temperature rises, the output voltage will decrease.

DIAGNOSIS CODE SET CONDITIONS



PROBABLE CAUSES



  • Malfunction of the A/T fluid temperature sensor
  • Damaged harness wires and connectors
  • Malfunction of the engine-A/T-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list
Item 7: A/T fluid temperature sensor (Refer to Data List Table ).

Q. Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
Go to Step 2.

STEP 2. Measure the resistance at A/T control solenoid valve assembly connector C-06.
Disconnect the connector, and measure the resistance between terminal 1 and 2 at the sensor side.
OK:

  • 16.7 - 20.5 kΩ (at 0°C)
  • 7.3 - 8.9 kΩ (at 20°C)
  • 3.4 - 4.2 kΩ (at 40°C)
  • 1.9 - 2.2 kΩ (at 60°C)
  • 1.0 - 1.2 kΩ (at 80°C)
  • 0.57 - 0.69 kΩ (at 100°C)

Q. Is the check result normal?
Go to Step 3.
Replace the A/T fluid temperature sensor.

STEP 3. Connector check: C-06 A/T control solenoid valve assembly
Check for the contact with terminals.

Q. Is the check result normal?
Go to Step 4.
Repair the defective connector.

STEP 4. Measure the resistance at A/T control solenoid valve assembly connector C-06.
Disconnect the connector, and measure the resistance between terminal 2 and earth at the wiring harness side.
OK: Continuity (Less than 2 Ω)

Q. Is the check result normal?
Go to Step 8.
Go to Step 5.

STEP 5. Measure the voltage at engine-A/T-ECU connector D-217.
(1)Connect A/T control solenoid valve assembly connector C-06.
(2)Turn the ignition switch to the ON position.
(3)Measure the voltage between engine-A/T-ECU connector D-217 terminal No.96 and earth.
OK: 0.5 V or less

Q. Is the check result normal?
Go to Step 13.
Go to Step 6.

STEP 6. Connector check: D-217 engine-A/T-ECU connector
Check for the contact with terminals.

Q. Is the check result normal?
Go to Step 7.
Repair the defective connector.

STEP 7. M.U.T.-III data list
Item 7: A/T fluid temperature sensor (Refer to Data List Table ).

Q. Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
Replace the engine-A/T-ECU.

STEP 8. Measure the voltage at A/T control solenoid valve assembly connector C-06.
(1)Disconnect the connector, and measure the voltage between terminal 1 and earth at the wiring harness side.
(2)Turn the ignition switch to the ON position.
OK: 4.5 - 4.9 V

Q. Is the check result normal?
Go to Step 7.
Go to Step 9.

STEP 9. Measure the voltage at engine-A/T-ECU connector D-217.
(1)Connect A/T control solenoid valve assembly connector C-06.
(2)Turn the ignition switch to the ON position.
(3)Measure the voltage between engine-A/T-ECU connector D-217 terminal No.119 and earth.
OK:

  • 3.8 - 4.0 V (at 20°C)
  • 3.2 - 3.4 V (at 40°C)
  • 1.7 - 1.9 V (at 80°C)

Q. Is the check result normal?
Go to Step 11.
Go to Step 10.

STEP 10. Connector check: D-217 engine-A/T-ECU connector
Check for the contact with terminals.

Q. Is the check result normal?
Go to Step 7.
Repair the defective connector.

STEP 11. Connector check: D-225 intermediate connector, D-217 engine-A/T-ECU connector
Check for the contact with terminals.

Q. Is the check result normal?
Go to Step 12.
Repair the defective connector.

STEP 12. Check the harness between A/T control solenoid valve assembly connector C-06 terminal No.1 and engine-A/T-ECU connector D-217 terminal No.119.
Check the output line for short circuited and open circuit.

Q. Is the check result normal?
Go to Step 7.
Repair the wiring harness.

STEP 13. Connector check: D-111 J/C (5), D-225 intermediate connector, D-217 engine-A/T-ECU connector.
Check for the contact with terminals.

Q. Is the check result normal?
Go to Step 14.
Repair the defective connector.

STEP 14. Check the harness between A/T control solenoid valve assembly connector C-06 terminal No.2 and engine-A/T-ECU connector D-217 terminal No.96.
Check the earth line for open circuit.

Q. Is the check result normal?
Go to Step 7.
Repair the wiring harness.