Test Description
WARNING: This page is about a different car, the 2007 Pontiac Montana SV6, 2007 Chevrolet Uplander, and 2007 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
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: Master Electrical Component List |
|||
| 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 | - |