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.
RUBBER SEAL INSPECTION
- 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.
Scheme 9
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 10
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 11
TESTING FOR "SHORTS" IN THE CIRCUIT
To simplify the discussion of shorts in the system, please refer to the following schematic.
Scheme 12
GROUND INSPECTION
- Ground connections are very important to the proper operation of electrical and electronic circuits. Ground connections are often exposed to moisture, dirt and other corrosive elements. The corrosion (rust) can become an unwanted resistance. This unwanted resistance can change the way a circuit works.
- Electronically controlled circuits are very sensitive to proper grounding. A loose or corroded ground can drastically affect an electronically controlled circuit. A poor or corroded ground can easily affect the circuit. Even when the ground connection looks clean, there can be a thin film of rust on the surface.
- When inspecting a ground connection follow these rules: Remove the ground bolt or screw. Inspect all mating surfaces for tarnish, dirt, rust, etc. Clean as required to assure good contact. Reinstall bolt or screw securely. Inspect for "add-on" accessories which may be interfering with the ground circuit. If several wires are crimped into one ground eyelet terminal, check for proper crimps. Make sure all of the wires are clean, securely fastened and providing a good ground path. If multiple wires are cased in one eyelet make sure no ground wires have excess wire insulation.
- For detailed ground distribution information, refer to " «GROUND DISTRIBUTION»(ref-675572-S03426813572014120500000) " in PG article.
Scheme 13
INSPECTION PROCEDURE
If the CONSULT cannot diagnose the system properly, check the following items.
| Symptom | Check item |
|---|---|
| CONSULT cannot access any system. | CONSULT DLC power supply circuit (Terminal 8) and ground circuit (Terminal 4) |
| CONSULT 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 CONSULT DLC (For detailed circuit, refer to wiring diagram for each system.) Open or short circuit CAN communication line. Refer to " TROUBLE DIAGNOSIS FLOW CHART ". |
Note. The DDL2 circuits and CAN communication lines from DLC pins 6, 7 and 14 may be connected to more than one system. A short in a DDL circuit or CAN lines connected to a control unit in one system may affect CONSULT access to other systems. For a complete DDL circuit layout, refer to " WIRING DIAGRAM - CONSULT/GST CHECKING SYSTEM ". For a complete CAN line layout, refer to " WIRING DIAGRAM ".
