Test Description
The number below refers to the step number on the diagnostic table.
- 4: If the battery positive voltage and ground circuits of the DLC are functioning properly. The malfunction must be due to the scan tool.
Scan Tool Does Not Power Up
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Data Communication Schematics Connector End View Reference: Data Communication Connector End Views |
|||
| 1 | Test the battery positive voltage circuit of the data link connector (DLC) for an open or a short to ground. Refer to Circuit Testing
or Wiring Repairs
. Did you find and correct the condition? |
Go to Diagnostic System Check - Vehicle | Go to Step 2 |
| 2 | Test the ground circuit from pin 4 of the DLC for an open or high resistance. Refer to Circuit Testing
or Wiring Repairs
. Did you find and correct the condition? |
Go to Diagnostic System Check - Vehicle | Go to Step 3 |
| 3 | Inspect for poor connections and terminal tension at the DLC. Refer to Testing for Intermittent Conditions and Poor Connections
or Connector Repairs
. Did you find and correct the condition? |
Go to Diagnostic System Check - Vehicle | Go to Step 4 |
| 4 | The scan tool may be malfunctioning. Refer to the scan tool user guide. Did you obtain a properly operating scan tool? |
Go to Diagnostic System Check - Vehicle | - |