Connector Measurement Service Tips

NOTE: Turn the ignition switch to OFF when connecting and disconnecting the connectors, and turn the ignition switch to ON when measuring if there are no instructions to the contrary.

IF INSPECTING WITH THE CONNECTOR CONNECTED (with Circuit in a Condition of Continuity)

Testing At Waterproof Connectors Using Special Tool (harness connector):

Waterproof Connectors
Be sure to use the special tool (harness connector). Never insert a test probe from the harness side, because to do so will reduce the waterproof performance and result in corrosion.




Non-Waterproof Connectors
Check by inserting the test probe from the harness side. Note that if the connector (control unit, etc..) is too small to permit insertion of the test probe, it should not be forced; use a special tool (the extra-thin probe in the harness set for checking) for this purpose.

IF INSPECTING WITH THE CONNECTOR DISCONNECTED

Using Special Tool (inspection harness) to Test at Female Pin:

When Inspecting a Female Pin
Use the special tool (inspection harness for connector pin contact pressure in the harness set for inspection). The inspection harness for connector pin contact pressure should be used. The test probe should never be forcibly inserted as it may cause a defective contact.




When Inspecting a Male Pin
Touch the pin directly with the test probe.

CAUTION: When doing this, be careful not to short the connector pins with the test probes. To do so may damage the circuits inside the ECU.





VISUALLY INSPECT CONNECTORS
- Connector is disconnected or improperly connected
- Connector pins are pulled out due to harness tension at terminal section
- Low contact pressure between male and female terminals
- Rusted terminals or foreign matter lodged in terminals (causing high connection resistance)





CONNECTOR PIN INSPECTION
If the connector pin stopper is damaged, the terminal connections (male and female pins) will not be perfect even when the connector body is connected, because the pins may pull out of the back side of the connector. Therefore, gently pull the wires one by one to make sure that no pins pull out of the connector.





CONNECTOR ENGAGEMENT INSPECTION
Use the special tool (connector pin connection pressure inspection harness of the inspection harness set) or a comparable male and female terminal attached to a wire, to inspect the engagement of the male pins and female pins. [Pin drawing force: 1 Nm (0.2 lbs.) or more]