OEM 2005 Toyota Prius Engine Control Module

2005 Toyota Prius Parts Questions & Experts Answers

• Q: How to replace the Engine Control Module (ECM) on 2005 Toyota Prius?

  A: The replacement of Engine Control Module (ECM) starts by taking out rear floor board No.2 alongside deck floor box rear along with rear floor board No.3. Engine wire No.3 (connected to the negative terminal of the battery) should be disconnected before removing the instrument panel register assembly No.1 together with the instrument panel finish panel sub assemblies lower and upper and instrument panel register assemblies No.2, No.3, and No.4. The first step requires technicians to take away the multi display assembly, glove compartment door stopper sub assembly, glove compartment door assembly, instrument panel cushion, instrument cluster finish panel end, instrument panel hole cover, and glove compartment door. Proceed by taking away the instrument panel speaker panel sub assembly No.1 with center speaker (with JBL sound system) and both front pillar garnish corner pieces along with front pillar garnishes (LH and RH). The passenger Air Bag connector needs removal before technicians detach the instrument panel sub assembly with passenger Air Bag assembly and uninstall the heater to register duct No.3. Disconnection of all 4 ECM connectors and 4 hybrid vehicle control ECU connectors is required before removing 2 bolts and a nut while also uninstalling 2 nuts followed by 6 screws for ECM brackets No. 1, 4 screws for ECM brackets No. 2 and 2 screws for ECM bracket No. 3. The install procedure requires a 3.0 Nm torque followed by reconnection of the heater to duct No.3 and instrument panel sub assembly with passenger Air Bag assembly before connecting the passenger Air Bag connector. After installing front pillar garnishes and corner pieces the technician should move forward with creating instrument panel speaker panel sub assembly No.1 and glove compartment door and instrument panel hole cover then the instrument cluster finish panel end instrument panel cushion glove compartment door assembly and glove compartment door stopper sub assembly before setting multi display assembly into place and installing instrument panel register assemblies No.2 No.3 and No.4. Install the instrument panel finish panel sub assemblies (upper and lower), instrument panel register assembly No.1 and reconnect engine wire No.3 (battery negative terminal) while inspecting the SRS warning light and reattaching the rear floor board No.3, deck floor box rear and rear floor board No.2. After the power window control system is initialized the process is complete.