Step
| Action
| Value(s)
| Yes
| No
|
1
|
- Install the scan tool.
- Turn ON the scan tool.
Does the scan tool turn ON?
| --
| System OK
|
Go to Step
2
|
2
|
- Disconnect the scan tool from the data link connector.
- Use the DMM to measure the voltage between terminal 16 of the
data link connector and a known good ground.
Is the measured voltage within the specified value?
| B+
|
Go to Step 4
|
Go to Step 3
|
3
|
- Locate an open or a high resistance in circuit A103.
- Repair the open or the high resistance in circuit A103.
Is the repair complete?
| --
|
Go to Step
6
| --
|
4
|
- Use the DMM to measure the resistance between terminal 4 of the
data link connector and a known good ground.
- Use the DMM to measure the resistance between terminal 5 of the
data link connector and a known good ground.
Is the measured resistance for both measurements within the specified
value?
| Less than 5 ohms
|
Go to Step 6
|
Go to Step 5
|
5
|
- Locate an open or a high resistance in circuits F114 and/or F115.
- Repair the open or the high resistance in circuits F114 and/or
F115.
Is the repair complete?
| --
|
Go to Step
6
| --
|
6
|
- Check the scan tool.
- Verify that the scan tool operates properly.
- NOTE: If the B+ and ground circuits are OK, the scan tool is not
functioning properly.
Does the scan tool operate properly?
| --
| System OK
|
Go to Step 1
|
