Scan Tool Does Not Communicate with UART Data Line Buick
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Data Link Communications System Check? | -- | Go to Step 2 | |
2 |
Does the Scan Tool communicate with the UART serial data line? | -- | Go to Step 4 | Go to Step 3 |
3 | The scan tool may be malfunctioning. Refer to the scan tool instruction manual in order to ensure that the Scan Tool is functioning. Does the Scan Tool operate properly? | -- | -- | |
4 |
Is the terminal contact between the data link connector (DLC) Scan Tool OK? | -- | Go to Step 6 | Go to Step 5 |
5 | Repair the terminal contact between the Scan Tool and the DLC. Did you complete the repair? | -- | -- | |
6 |
Does the Scan Tool communicate with the instrument cluster? | -- | Go to Step 7 | Go to Step 8 |
7 | Replace the EBTCM. Refer to Electronic Brake and Traction Control Module Replacement in Antilock Brake System. Did you complete the repair? | -- | -- | |
8 |
Does the Scan Tool communicate with the instrument cluster? | -- | Go to Step 9 | Go to Step 12 |
9 | Test CKT 800 (TAN) between the heater and A/C programmer connector C2, terminal C8, and the EBTCM connector terminal 23 for a short to ground or battery positive voltage (B+). Did you find the condition? | -- | Go to Step 10 | Go to Step 11 |
10 | Repair the short in CKT 800 (TAN). Did you complete the repair? | -- | -- | |
11 | Replace the heater and A/C programmer. Refer to Programmer Replacement in HVAC System--Automatic. Did you complete the repair? | -- | -- | |
12 | Is the vehicle equipped with the cellular telephone module? | -- | Go to Step 13 | Go to Step 15 |
13 |
Does the Scan Tool communicate with the instrument cluster? | -- | Go to Step 14 | Go to Step 15 |
14 | Replace the cellular telephone module. Did you complete the repair? | -- | -- | |
15 |
Does the Scan Tool communicate with the instrument cluster? | -- | Go to Step 16 | Go to Step 17 |
16 | Replace the SDM. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement in SIR. Did you complete the repair? | -- | -- | |
17 |
Does the Scan Tool communicate with the instrument cluster? | -- | Go to Step 18 | Go to Step 19 |
18 | Replace the PCM. Refer to Powertrain Control Module Replacement/Programming in Engine Controls--3.8L. Did you complete the repair? | -- | -- | |
19 |
Does the Scan Tool communicate with the PCM? | -- | Go to Step 21 | Go to Step 20 |
20 | Repair the open, the short to ground, or the short to battery positive voltage (B+) in CKT 800 (TAN). Did you complete the repair? | -- | -- | |
21 | Test CKT 800 (TAN) between the instrument cluster connector C1, terminal E11, and the EBTCM connector terminal 42 for a short to ground, or a short to battery positive voltage (B+). Did you find the condition? | -- | Go to Step 20 | Go to Step 22 |
22 | Replace the instrument cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console. Did you complete the repair? | -- | -- |
Scan Tool Does Not Communicate with UART Data Line Oldsmobile
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Data Link Communications System Check? | -- | Go to Step 2 | |
2 |
Does the Scan Tool communicate with the UART serial data line? | -- | Go to Step 4 | Go to Step 3 |
3 | The scan tool may be malfunctioning. Refer to the scan tool instruction manual in order to ensure that the Scan Tool is functioning. Does the Scan Tool operate properly? | -- | -- | |
4 |
Is the terminal contact between the data link connector (DLC) and the Scan Tool OK? | -- | Go to Step 6 | Go to Step 5 |
5 | Repair the terminal contact between the Scan Tool and the DLC. Did you complete the repair? | -- | -- | |
6 |
Does the Scan Tool communicate with the instrument cluster? | -- | Go to Step 7 | Go to Step 8 |
7 | Replace the EBTCM. Refer to Electronic Brake and Traction Control Module Replacement in Antilock Brake System. Did you complete the repair? | -- | -- | |
8 |
Does the Scan Tool communicate with the instrument cluster? | -- | Go to Step 9 | Go to Step 12 |
9 | Test CKT 800 (TAN) between the heater and A/C programmer connector C2, terminal C8, and the EBTCM connector terminal 23 for a short to ground or battery positive voltage (B+). Did you find the condition? | -- | Go to Step 10 | Go to Step 11 |
10 | Repair the short in CKT 800 (TAN). Did you complete the repair? | -- | -- | |
11 | Replace the heater and A/C programmer. Refer to Programmer Replacement in HVAC Systems--Automatic. Did you complete the repair? | -- | -- | |
12 | Is the vehicle equipped with the cellular telephone module? | -- | Go to Step 13 | Go to Step 15 |
13 |
Does the Scan Tool communicate with the instrument cluster? | -- | Go to Step 14 | Go to Step 15 |
14 | Replace the cellular telephone module. Did you complete the repair? | -- | -- | |
15 |
Does the Scan Tool communicate with the instrument cluster? | -- | Go to Step 16 | Go to Step 17 |
16 | Replace the SDM. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement in SIR. Did you complete the repair? | -- | -- | |
17 |
Does the Scan Tool communicate with the instrument cluster? | -- | Go to Step 18 | Go to Step 19 |
18 | Replace the PCM. Refer to Powertrain Control Module Replacement/Programming in Engine Controls--3.8L Did you complete the repair? | -- | -- | |
19 |
Does the Scan Tool communicate with the PCM? | -- | Go to Step 20 | Go to Step 21 |
20 | Replace the heater and A/C control. Refer to Control Assembly Replacement in HVAC System--Automatic Did you complete the repair? | -- | -- | |
21 |
Does the Scan Tool communicate with the PCM? | -- | Go to Step 22 | Go to Step 27 |
22 | Test CKT 1061 (ORN/BLK) for a short to ground, or battery positive voltage (B+) between the instrument cluster connector C1, terminal D8 and the DLC connector terminal 1. Did you find the condition? | -- | Go to Step 26 | Go to Step 23 |
23 | Test CKT 1061 (ORN/BLK) for a short to ground, or battery positive voltage (B+) between the instrument cluster connector C1, terminal C8 and the heater and A/C control connector terminal A3. Did you find the condition? | -- | Go to Step 26 | Go to Step 24 |
24 | Test CKT 800 (TAN) for a short to ground or battery positive voltage (B+) between the instrument cluster connector C1, terminal D9 and the EBTCM connector terminal 42. Did you find the condition? | -- | Go to Step 25 | Go to Step 26 |
25 | Repair the short to ground or battery positive voltage (B+) in CKT 800 (TAN). Did you complete the repair? | -- | -- | |
26 | Replace the instrument cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console. Did you complete the repair? | -- | -- | |
27 | Repair the open, short to ground, or battery positive voltage (B+) in CKT 800 (TAN). Did you complete the repair? | -- | -- | |
28 | Repair the short to ground or battery positive voltage (B+) in CKT 1061 (ORN/BLK). Did you complete the repair? | -- | -- |
