19-3 Electrical System Troubleshooting Short Circuit Check 1. Disconnect the connectors at both ends of the corresponding harness. 2. Measure the resistance between the corresponding connector terminal and frame. Be sure to inspect the connectors at both ends. 0 Standard: 1 M Ω or above 1 Note: Measure while jiggling the wire harness up and down and sideways. 2 3 3. Measure the resistance between terminals of the corresponding connector. Be sure to inspect the connectors at both ends. 4 Standard: 1 M Ω or above 5 Note: The wiring may short-circuit due to pinching by the body or defective clamping. 6 7 8 Visual and Contact Pressure Checks 9 1.
Disconnect the connectors at both ends of the corresponding harness. 2. Visually inspect that there is neither rust nor foreign matter trapped at connector terminals. 10 11 3. Inspect that there is no looseness or damage at the crimped portion. Also, lightly pull the wire harness from the connector to check that it does not come off. 12 13 4. Insert a male terminal same as that of the connector terminal to a female connector and check the drawing force. Defective contact may exist at a terminal where the drawing force is less than that of other terminals. 14 15 Note:
Even if there is rust or foreign matter trapped at the terminal, or the contact pressure between male and female terminals is low, abnormal contact condition may be changed to normal by disconnecting and reconnecting the connector. In this case, disconnect and reconnect the connector several times, and if a fault occurs even once, then consider the terminal may have a defective contact. 16 17 18 19 20 21 E Section 19