Step
| Action
| Value(s)
| Yes
| No
|
1
| Was the Data Link Communications Diagnostic System Check
performed?
| --
|
Go to Step
2
| Go to
Diagnostic System Check - Data Link Communications
|
2
|
- Install a scan tool.
- Turn ON the scan tool.
Does the scan tool turn ON?
| --
| System OK
|
Go to Step 3
|
3
|
- Disconnect the scan tool from the DLC.
- Connect a test lamp to ground.
- Probe the DLC connector terminal 16.
Did the test lamp light?
| --
|
Go to Step 4
|
Go to Step 6
|
4
|
- Connect a test lamp to battery voltage.
- Probe the DLC connector terminal 4.
Did the test lamp light?
| --
|
Go to Step 5
|
Go to Step 7
|
5
|
- Connect a test lamp to battery voltage.
- Probe the DLC connector terminal 5.
Did the test lamp light?
| --
|
Go to Step 9
|
Go to Step 8
|
6
| Locate and repair an open in CKT 1240.
Is the repair complete?
| --
|
Go to Step 11
| --
|
7
| Locate and repair an open in CKT 150.
Is the repair complete?
| --
|
Go to Step 11
| --
|
8
| Locate and repair an open in CKT 851.
Is the repair complete?
| --
|
Go to Step 11
| --
|
9
|
| • | If the B+ and ground circuits are OK, the scan tool should power
up. |
| • | Refer to the scan tool instruction manual. |
| • | Make sure the scan tool is capable of being powered by the DLC. |
Have you verified that the scan tool is capable of being powered by
the DLC?
| --
|
Go to Step
10
| --
|
10
| Scan tool may be malfunctioning. Refer to scan tool instruction manual.
Try using a different scan tool.
Is the replacement complete?
| --
|
Go to Step 11
| --
|
11
|
- Reconnect or install any connectors and components that were disconnected
or removed.
- Verify that the scan tool operates properly.
Is the repair complete?
| --
| System OK
| --
|
