Data Link Connector Diagnosis

Circuit Description

IMPORTANT: This vehicle, equipped with a Powertrain Control Module (PCM), utilizes an Electrically Erasable Programmable Read Only Memory (EEPROM). Program the new PCM when the diagnostics call for replacement of the PCM. Refer to PCM/TAC Module Replacement.

Use a properly functioning scan tool with the diagnostic tables in this section. DO NOT use the Clear Info function unless instructed by a diagnostic procedure.

Test Description
The numbers below refer to the step numbers on the diagnostic table.
3. An engine which starts and then stalls is a good indication that there is a problem with the Vehicle Theft Deterrent system, or the Class 2 circuit, or the Column Lock system exists. Refer to Body and Accessories/Wiring Systems.
4. An engine that just cranks and does not attempt to start indicates that the PCM is not powered-up. Refer to PCM Schematic (full page) under Diagrams for PCM harness terminal numbers.
6. A ground must be available at both terminals for the scan tool to operate.
9. A no start condition occurs when fuse 16 or 23 is open. The MIL is inoperative and the Driver Information Center will display the Reduced Engine Power message. Refer to Engine Controls Power, Ground, DLC, MIL under Diagrams for complete circuit details.
14. If the test lamp does not illuminate for a circuit, inspect the fuse for being open. If the fuse is open, inspect the circuit for a short to ground.
16. Inspect for an open fuse 29 in the Instrument Panel Electrical Center. If the fuse is open, repair the grounded circuit.