Waterproof Connector Inspection
If water enters the connector, it can short interior circuits. This may lead to intermittent problems.
Check the following items to maintain the original waterproof characteristics.
Scheme 13
- Most waterproof connectors are provided with a rubber seal between the male and female connectors. If the seal is missing, the waterproof performance may not meet specifications.
- The rubber seal may come off when connectors are disconnected. Whenever connectors are reconnected, make sure the rubber seal is properly installed on either side of male or female connector.
WIRE SEAL INSPECTION
- The wire seal must be installed on the wire insertion area of a waterproof connector. Be sure that the seal is installed properly.
Terminal Lock Inspection
Check for unlocked terminals by pulling wire at the end of connector. An unlocked terminal may create intermittent signals in the circuit.
Scheme 14
TESTING FOR "OPENS" IN THE CIRCUIT
Before you begin to diagnose and test the system, you should rough sketch a schematic of the system. This will help you to logically walk through the diagnosis process. Drawing the sketch will also reinforce your working knowledge of the system.
Scheme 15
TESTING FOR "SHORTS" IN THE CIRCUIT
To simplify the discussion of shorts in the system, please refer to the following schematic.
Scheme 16
CONTROL UNIT CIRCUIT TEST
System Description
- When the switch is ON, the control unit lights up the lamp.
Scheme 17
INSPECTION PROCEDURE
If the SDT cannot diagnose the system properly, check the following items.
| Symptom | Check item |
|---|---|
| SDT cannot access any system. | SDT DLC power supply circuit (Terminal 8) and ground circuit (Terminal 4) |
| SDT cannot access individual system. (Other systems can be accessed.) | Power supply and ground circuit for the control unit of the system (For detailed circuit, refer to WIRING DIAGRAM for each system.) Open or short circuit between the system and SDT DLC (For detailed circuit, refer to WIRING DIAGRAM for each system.) Open or short circuit CAN communication line. Refer to LAN SYSTEM: BASIC INSPECTION |
SDT INSPECTION PROCEDURE
Note. The CAN and DDL2 circuits from DLC pins 6, 7 and 14 may be connected to more than one system. A short in any circuit connected to a control unit in one system may affect SDT access to other systems.
