Test Description
The numbers below refer to the step numbers on the diagnostic table.
- 2: Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition.
- 3: The symptom list in Symptoms will determine the correct diagnostic procedure to use.
- 4: The presence of DTCs U1000-U1305 indicate some other module is not communicating. The specified procedure will compile all the available information before tests are performed.
Diagnostic System Check - Head Up Display
| Step | Action | Yes | No |
|---|---|---|---|
| 1 | Install a scan tool. Does the scan tool power up? |
Go to Step 2 | Go to Scan Tool Does Not Power Up in Data Link Communications |
| 2 |
|
Go to Step 3 | Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications |
| 3 | Select the display DTCs function on the scan tool for the following control modules:
Does the scan tool display any DTCs for the control modules listed above? |
Go to Step 4 | Go to Symptoms - Instrument Panel, Gages and Console |
| 4 | Does the scan tool display DTCs U1000-U1305? | Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications | Go to Step 5 |
| 5 | Does the scan tool display DTC B1000, B1001,B1004, B1007, B1009, B1010, B1390, or B1422? | Go to Diagnostic Trouble Code (DTC) List in Body Control System | Go to Step 6 |
| 6 | Does the scan tool display DTC B1327, B1513, B1514, P0560, or P0620? | Go to Diagnostic Trouble Code (DTC) List in Engine Electrical | Go to Diagnostic Trouble Code (DTC) List |