Diagnosis & Repair

WARNING: This page is about a different car, the 2003 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Using hand-held tester or scan tool, read FREEZE FRAME data. Freeze frame data records engine conditions when malfunction is detected.

After confirming DTCs P0115, P0117 and/or P0118, use the hand-held tester or the OBD II scan tool to confirm the engine coolant temperature from the DIAGNOSIS/ENHANCED OBD II/DATA LIST/ALL. Read the engine coolant temperature for ECT sensor. If displayed engine coolant temperature is -40°F (-40°C), ECT sensor circuit may be open. If displayed engine coolant temperature is 284°F (140°C) or more, ECT sensor circuit may be shorted.

For circuit wiring diagram, diagnosis and repair procedure, see Fig 1-Fig 3 .

For ECM location, see Figure. For ECM connector view, see Figure. For testing of systems or components, see SYSTEM & COMPONENT TESTING - V6 & V8 article. For removal and installation of components, see REMOVAL & INSTALLATION - V6 & V8 article.

Fig 1: DTC P0115, P0117 & P0118 Diagnostic Procedure (Step 1)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: DTC P0115, P0117 & P0118 Diagnostic Procedure (Steps 2-3)

Fig 3: DTC P0115, P0117 & P0118 Diagnostic Procedure (Steps 4-5)