WRONG CORRECT [Diagram showing wrong and correct wire handling] HA0263 WRONG CORRECT [Diagram showing wrong and correct hose connection] HA0264 Example [Diagram showing vacuum hose routing example with labels "VTV for", "White Side", "VTV for B1", "Black Side"] OV0017 12 Observe the following precautions to avoid damage to the parts: (a) Do not open the cover or case of the ECU unless absolutely necessary. (If the IC terminals are touched, the IC may be destroyed by static electricity.) (b) To disconnect vacuum hose, pull on the end, not the middle of the hose. (c) To pull apart electrical connectors, pull on the connector itself not the wires. (d) Be careful not to drop electrical components, such as sensors or relays. If they are dropped on a hard floor, they should be replaced and not reused. (e) When steam cleaning an engine, protect the distributor, coil, air filter and air intake from water. (f) Never use an impact wrench to remove or install temperature switches or temperature sensors. (g) When checking continuity at the wire connector, insert the tester probe carefully to prevent terminals from bending. (h) When using a vacuum gauge, never force the hose onto a connector that is too large. Use a step-down adapter instead. Once the hose has been stretched, it may leak. 13 Tag hoses before disconnecting them: (a) When disconnecting vacuum hose, use tags to identify how they should be reconnected. (b) After completing a job, double check that the vacuum hoses are properly connected. A label under the hood shows the proper layout.