Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Data Link Communications System Check performed? | -- | Go to Step 2 | Refer to Data Link Communications System Check . |
2 |
Is the fuse open? | -- | Go to Step 3 | Go to Step 4 |
3 | Locate and repair the source of the overload in CKT 540 (ORN) and replace the fuse. Is the repair complete? | -- | System OK | -- |
4 | Connect a test light from the ENG-BAT fuse to ground. Did the test light illuminate? | -- | Go to Step 6 | Go to Step 5 |
5 | Locate and repair the open in the power supply circuit between the junction block and the ENG-BAT fuse. Is the repair complete? | -- | System OK | -- |
6 | Connect a test light from the DLC, terminal 16 to ground. Did the test light illuminate? | -- | Go to Step 8 | Go to Step 7 |
7 | Locate and repair the open in CKT 540 (ORN) between the ENG-BAT fuse and the DLC. Is the repair complete? | -- | System OK | -- |
8 | Connect a test light from the DLC, terminal 16 to terminal 5. Did the test light illuminate? | -- | Go to Step 10 | Go to Step 9 |
9 | Locate and repair the open in CKT 451 (BLK/WHT) between the DLC and G 108. Is the repair complete? | -- | System OK | -- |
10 | Connect a test light from the DLC, terminal 16 to terminal 4. Did the test light illuminate? | -- | Go to Step 12 | Go to Step 11 |
11 | Locate and repair the open in CKT 250 (BLK) between the DLC and G 200. Is the repair complete? | -- | System OK | -- |
12 | Does the vehicle have a diesel engine? | -- | Go to Step 15 | Go to Step 13 |
13 |
Will the scan tool communicate with the vehicle control module (VCM)? | -- | Go to Step 17 | Go to Step 14 |
14 | Perform the Scan Tool to VCM Diagnostics. Refer to Scan Tool Does Not Communicate with Vehicle Control Module/Powertrain Control Module . Are these diagnostics complete? | -- | System OK | -- |
15 |
Will the scan tool communicate with the powertrain control module (PCM)? | -- | Go to Step 17 | Go to Step 16 |
16 | Perform the Scan Tool to PCM Diagnostics. Refer to Scan Tool Does Not Communicate with Vehicle Control Module/Powertrain Control Module . Are these diagnostics complete? | -- | System OK | -- |
17 |
Will the scan tool communicate with the EBCM? | -- | Go to Step 19 | Go to Step 18 |
18 | Perform the Scan Tool to EBCM Diagnostics. Refer to Scan Tool Does Not Communicate with Electronic Brake Control Module . Are these diagnostics complete? | -- | System OK | -- |
19 |
Will the scan tool communicate with the TCM? | -- | System OK | Go to Step 20 |
20 | Perform the Scan Tool to TCM Diagnostics. Refer to Scan Tool Does Not Communicate with Transmission Control Module . Are these diagnostics complete? | -- | System OK | -- |
