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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 61 (Automatic Transmission Diagnosis - U140E & U140F) >> Diagnostic Tests >> DTC P0710 & P0711: Automatic Transaxle Fluid Temperature Sensor Circuit Malfunction (CAMRY, Highlander, RAV4 & RX 300) >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2002 Toyota RAV4, 2002 Toyota Highlander, 2002 Toyota Camry, 2002 Lexus RX 300, and 2001 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: The values given below for "normal operating temperature" are representative values, so a vehicle may still be normal even if its value differs from those listed here. Do not depend solely on the "normal operating temperature" here when deciding whether or not the part is faulty.
  1. Start and warm the engine to normal operating temperature. Turn ignition off. Install a scan tool. Turn ignition on, and turn the scan tool on. Select AT FLUID TEMP in the data list and read the displayed value. Normal operating temperature should be approximately 176°F (80°C). If temperature is close to specification, replace ECM. See appropriate REMOVAL, OVERHAUL & INSTALLATION article in ENGINE PERFORMANCE. If temperature reads -40°F (-40°C) or 437°F (225°C), the circuit is open or shorted to ground. If reading was not close to 176°F (80°C) and not open or shorted, go to next step.
  2. Raise and support vehicle. Disconnect 10-pin solenoid connector located above PNP switch on side of transaxle. See Figure. Remove transaxle oil pan. See LUBRICATION in appropriate AUTOMATIC article in TRANSMISSION SERVICING. Disconnect all solenoid connectors at solenoids. See Figure. Remove transaxle wiring harness from transaxle. Submerge ATF temperature sensor in water. Heat water while measuring sensor resistance between solenoid connector terminals No. 1 and 6. At 77°F (25°C), resistance should be 3.5 k/ohms. At 230°F (110°C), resistance should be 231-263 ohms.
  3. If resistance is not as specified, replace ATF temperature sensor. Sensor is part of transaxle internal wiring harness. If resistance is as specified, check and repair wiring harness and connector between ATF temperature sensor and ECM. If wiring harness and connector are okay, replace ECM. See appropriate REMOVAL, OVERHAUL & INSTALLATION article in ENGINE PERFORMANCE.
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