Data Link Connector Diagnosis: Troubleshooting
TROUBLESHOOTING CHART
| Step | Action | Value (s) | Yes | No |
|---|---|---|---|---|
| 1 | Perform an ON-BOARD DIAGNOSTIC (OBD II) SYSTEM CHECK . Was the check performed? |
- | Go to Step 2 | Go to On-Board Diagnostic (OBD II) System Check |
| 2 | With a test light connected to the ground, probe the Data Link Connector (DLC) battery feed terminal 16. Is the test light illuminate? |
- | Go to Step 4 | Go to Step 3 |
| 3 | Repair an open or short to ground in the DLC battery feed circuit. Is the repair complete? |
- | Go to Step 4 | - |
| 4 | With a test light connected to the battery, probe the DLC ground terminal 4 and 5. Is the test light illuminate? |
- | Go to Step 6 | Go to Step 5 |
| 5 | Repair an open circuit. Is the repair complete? |
- | Go to Step 6 | - |
| 6 |
Does the scan tool power up? |
- | Go to Step 8 | Go to Step 7 |
| 7 | Check for damages in the terminal of DLC and scan tool, and repair as needed. Is the repair complete? |
- | Go to Step 8 | - |
| 8 | Using a scan tool, request engine data of Engine Control Module (ECM). Does the scan tool display any data? |
- | Go to Step 12 | Go to Step 9 |
| 9 | Install the scan tool on another vehicle and check for proper operation. Does the scan tool work properly on a different vehicle. |
- | Go to Step 11 | Go to Step 10 |
| 10 | The scan tool is malfunctioning. Refer to the scan tool's manual for repair. Is the repair complete? |
- | Go to Step 12 | - |
| 11 | Repair communication circuit between ECM and DLC. Is the repair complete? |
- | Go to Step 12 | - |
| 12 |
Does the engine and continue to run? |
- | Go to Step 13 | Go to Step 2 |
| 13 |
Are any DTCs displayed that have not been diagnosed? |
- | Go to applicable DTC TABLE | System OK |