Step | Action | Values | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
1 | Did you perform the System Check? | -- | Go to Step 2 | Go to Data Link Communications System Check | ||||||
2 | Attempt to establish communication with the same system on a different vehicle. Can you establish communication? | -- | Go to Step 3 | Go to Step 4 | ||||||
3 |
Is the connection good? | -- | Go to Step 5 | Go to Step 6 | ||||||
4 | The scan tool may be malfunctioning. Refer to Scan Tool Instruction Manual. Is the repair complete? | -- | Go to Data Link Communications System Check | -- | ||||||
5 | Measure the resistance of the data link connector (DLC-OBD II) from terminal 9 to terminal 5. Does the J 39200 display OL? | -- | Go to Step 7 | Go to Step 8 | ||||||
6 | Repair the data link connector terminal 9, or reconnect the scan tool as necessary. Is the repair complete? | -- | Go to Data Link Communications System Check | -- | ||||||
7 | Measure the voltage of the data link connector (DLC-OBD II) from terminal 9 to terminal 5. Did you measure any voltage? | -- | Go to Step 10 | Go to Step 9 | ||||||
8 | Repair a short to ground in the PPL wire or in the PPL/WHT wire between the following components:
Is the repair complete? | -- | Go to Data Link Communications System Check | -- | ||||||
9 | Measure the voltage on the data link connector (DLC-OBD II) from terminal 16 to ground. Did you measure the system voltage? | -- | Go to Step 11 | Go to Step 12 | ||||||
10 | Repair a short to voltage in the PPL wire or in the PPL/WHT wire between the following components:
Is the repair complete? | -- | Go to Data Link Communications System Check | -- | ||||||
11 |
Is the repair complete? | -- | Go to Data Link Communications System Check | -- | ||||||
12 | Repair the open in the WHT wire between the junction block and the data link connnector. Is the repair complete? | -- | Go to Data Link Communications System Check | -- |
