00 When applying a voltage to a part for inspection purposes, check that the (+) and (–) cables are connected properly then gradually increase the voltage from zero. Do not exceed the specified voltage. Remember that control units and sensors do not necessarily op- erate on the battery voltage. 1. Handling Precautions for Electric Circuits 1.1 Inspection of harnesses (1) Inspections with connectors fitted together (1.1) Waterproof connectors Connect an inspection harness and connector A between the connectors B of the circuit to be inspected. Perform the inspec- tion by applying a test probe C to the connectors of the inspec- tion harness.
Do not insert the test probe C into the wire-entry sides of the waterproof connectors since this would damage their waterproof seals and lead to rust. (1.2) Non-waterproof connectors Perform the inspection by inserting a test probe C into the wire- entry sides of the connectors. An extra-narrow probe is required for control unit connectors, which are smaller than other types of connector. Do not force a regular-size probe into control unit connectors since this would cause damage. (2) Inspections with connectors separated (2.1) Inspections on female terminals Perform the inspection by carefully inserting a test probe into the terminals.
Do not force the test probe into the terminals since this could deform them and cause poor connections. 00-11 CAUTION