LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 98 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0115, DTC P0117 Or DTC P0118 >> Diagnosis & Repair

Diagnosis & Repair

WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
  1. If DTC P0118 is set, go to step  3 and check for an open in engine coolant temperature sensor circuit. If DTC P0117 is set, go to step  5 and check for short in engine coolant temperature sensor circuit. If DTC P0115 is set, check for open or short in engine coolant temperature sensor circuit. Go to next step.
  2. Connect scan tool to Data Link Connector (DLC) No. 3. See Figure. Turn ignition on. Turn scan tool on. Using scan tool, select DIAGNOSIS/ENHANCED OBD II/DATA LIST/ALL DATA/COOLANT TEMP. Monitor ECT sensor temperature. If temperature displayed is same as actual coolant temperature, problem is intermittent. If temperature displayed is -40°F (-40°C), go to next step. If temperature displayed is 284°F (140°C), go to step  5.
  3. Turn ignition off. Disconnect ECT sensor connector. Connect a fused jumper wire between ECT sensor harness connector terminals. See Fig 1. Turn ignition on. Using scan tool, monitor ECT sensor temperature. If temperature displayed is 284°F (140°C) or more, check ECT sensor connector for corrosion, damage or loose terminals. If sensor connector is okay, replace ECT sensor and retest. If temperature displayed is not 284°F (140°C) or more, go to next step.
    Fig 1: Connecting Jumper Wire At Engine Coolant Temperature Sensor Harness Connectors
    G00165116Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Turn ignition off. Remove fused jumper wire. Backprobing connector, connect fused jumper wire between terminals ETHW and THW at ECM E4 connector. See Fig 2. If temperature displayed on scan tool is 284°F (140°C) or more, check for an open in Red/Blue wire or Brown wire between ECT sensor harness connector and ECM E4 connector. If temperature displayed on scan tool is not 284°F (140°C) or more, replace ECM and retest.
    Fig 2: Connecting Jumper Wire Between Terminals ETHW & THW Of ECM
    G00165117Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. Turn ignition off. Disconnect ECT sensor connector. See Fig 3. Turn ignition on. If temperature displayed on scan tool is -40°F (-40°C), replace ECT sensor and retest. If temperature displayed is not -40°F (-40°C), turn ignition off and go to next step.
    Fig 3: Disconnecting Engine Coolant Temperature Sensor
    G00165118Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. Disconnect E4 connector from ECM. See Fig 4. Turn ignition on. If temperature displayed on scan tool is -40°F (-40°C), check for short in Red/Blue or Brown wire between ECT sensor and ECM E4 connector. If temperature displayed on scan tool is not -40°F (-40°C), replace ECM and retest.
    Fig 4: Disconnecting ECM Connector E4
    G00165119Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
scientia non olet · About LEMON Manuals