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
If the A/T fluid temperature
sensor output voltage is 4.5 volts or more after driving for 10 minutes or
more, there is an open circuit in the A/T fluid temperature sensor and
diagnosis code No.P1763 (P0713) is set.
PROBABLE CAUSES
- Malfunction of the A/T fluid temperature sensor
- Damaged harness wires and connectors
- Malfunction of the A/T-ECU <4M4>
- Malfunction of the engine-A/T-ECU <6G7>
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STEP 1. M.U.T.-III data list
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Item 7: A/T fluid temperature sensor
(Refer to Data List Table  ).
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Q.
Is the check result normal?
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 Intermittent malfunction (Refer to
GROUP 00 - How to Cope with Intermittent Malfunction ).
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 Go to Step 2.
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STEP 2. Measure the resistance at A/T control solenoid valve
assembly connector C-06.
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Disconnect the connector, and measure the
resistance between terminal 1 and 2 at the sensor side.
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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)
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Q.
Is the check result normal?
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Go to Step 3.
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Replace the A/T fluid
temperature sensor.
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STEP 3. Connector check: C-06 A/T control solenoid valve
assembly
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Check for the contact with terminals.
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Q.
Is the check result normal?
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Go to Step 4.
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Repair
the defective connector.
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STEP 4. Measure the resistance at A/T control solenoid valve
assembly connector C-06.
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Disconnect the connector, and measure the
resistance between terminal 2 and earth at the wiring harness
side.
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OK: Continuity (Less than 2
Ω)
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Q.
Is the check result normal?
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Go to Step 8.
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Go to Step 5.
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STEP 5. Measure the voltage at A/T-ECU connector D-38 <4M4>
or engine-A/T-ECU connector D-217 <6G7>.
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(1)Connect A/T control solenoid valve assembly
connector C-06.
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(2)Turn the ignition switch to the ON position.
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(3)Measure the voltage between A/T-ECU connector D-38
terminal No.43 <4M4> and earth or engine-A/T-ECU connector D-217
terminal No.96 <6G7> and earth.
OK: 0.5 V or
less
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Q.
Is the check result normal?
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Go to Step 13.
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Go to Step 6.
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STEP 6. Connector check: D-38 A/T-ECU connector <4M4> or
D-217 engine-A/T-ECU connector <6G7>
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Check for the contact with terminals.
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Q.
Is the check result normal?
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Go to Step 7.
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Repair
the defective connector.
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STEP 7. M.U.T.-III data list
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Item 7: A/T fluid temperature sensor
(Refer to Data List Table ).
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Q.
Is the check result normal?
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Intermittent malfunction (Refer to
GROUP 00 - How to Cope with Intermittent Malfunction ).
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Replace the A/T-ECU<4M4>
or engine-A/T-ECU<6G7>.
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STEP 8. Measure the voltage at A/T control solenoid valve
assembly connector C-06.
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(1)Disconnect the connector, and measure the voltage between
terminal 1 and earth at the wiring harness side.
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(2)Turn the ignition switch to the ON
position.
OK: 4.5 - 4.9 V
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Q.
Is the check result normal?
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Go to Step 7.
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Go to Step 9.
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STEP 9. Measure the voltage at A/T-ECU connector D-38 <4M4>
or engine-A/T-ECU connector D-217 <6G7>.
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(1)Connect A/T control solenoid valve assembly
connector C-06.
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(2)Turn the ignition switch to the ON position.
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(3)Measure the voltage between A/T-ECU connector D-38
terminal No.44 <4M4> and earth or engine-A/T-ECU connector D-217
terminal No.119 <6G7> 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)
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Q.
Is the check result normal?
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Go to Step 11.
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Go to Step 10.
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STEP 10. Connector check: D-38 A/T-ECU connector <4M4> or
D-217 engine-A/T-ECU connector <6G7>
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Check for the contact with terminals.
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Q.
Is the check result normal?
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Go to Step 7.
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Repair
the defective connector.
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STEP 11. Connector check: D-225 intermediate connector, D-38 A/T-ECU
connector <4M4> or D-217 engine-A/T-ECU connector
<6G7>
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Check for the contact with terminals.
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Q.
Is the check result normal?
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Go to Step 12.
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Repair
the defective connector.
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STEP 12. Check the harness between A/T control solenoid valve
assembly connector C-06 terminal No.1 and A/T-ECU connector D-38 terminal
No.44 <4M4> or engine-A/T-ECU connector D-217 terminal No.119
<6G7>.
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Check the output line for short-circuited or
open circuit.
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Q.
Is the check result normal?
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Go to Step 7.
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Repair
the wiring harness.
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STEP 13. Connector check: D-111 J/C (5) <6G7>, D-38 A/T-ECU
connector <4M4> or D-217 engine-A/T-ECU connector
<6G7>.
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Check for the contact with terminals.
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Q.
Is the check result normal?
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Go to Step 14.
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Repair
the defective connector.
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STEP 14. Check the harness between A/T control solenoid valve
assembly connector C-06 terminal No.2 and A/T-ECU connector D-38 terminal
No.43 <4M4> or engine-A/T-ECU connector D-217 terminal No.96
<6G7>.
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Check the earth line for open circuit.
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Q.
Is the check result normal?
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Go to Step 7.
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Repair
the wiring harness.
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