Data Link Connector: Testing and Inspection

Diagnosis Connector:

Proper functioning of the Diagnosis Connector "TEN" terminal can be checked with Mazda System Selector (SST #49 B019 9A0) or equivalent aftermarket tool.

1. Connect SST to diagnosis connector and switch ignition "ON."
2. With SST test switch set at "O2 MONITOR," voltage at ECU terminal 1K should be approximately 12V.
3. With SST switch set at "SELF-TEST," voltage should be below 1.0V.
4. If voltage is always below 1.0V, check for short circuit in wiring between diagnosis connector "TEN" terminal and ECU.
5. If voltage is always approximately 12V, check for open circuit in wiring between "TEN" terminal and ECU, and/or between diagnosis connector terminal "GND" and ground.