Diagnostic Aids
WARNING: This page is about a different car, the 2005 GMC Yukon XL, 2005 Chevrolet Suburban, and 2005 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- An ECT sensor or PCM which is intermittently shorted, open, or skewed is possible, but very unlikely
- An intermittent open or a short to voltage in the ECT sensor signal circuit could result in DTC P1115 setting. Refer to Intermittent Conditions .
DTC P1115
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Engine Controls Schematics Connector End View Reference: Powertrain Control Module (PCM) Connector End Views or Engine Controls Connector End Views |
|||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Observe the DTC information with a scan tool. Is DTC P0118 set? |
Go to DTC P0118 | Go to Step 3 |
| 3 |
|
Go to Step 5 | Go to Step 4 |
| 4 | Observe the ECT parameter with a scan tool while moving the wiring harness at the ECT sensor and the PCM. Does the scan tool indicate an abrupt change in value? |
Go to Step 6 | Go to Step 7 |
| 5 | Repair the ECT connector or the terminal as necessary. Refer to Circuit Testing
and Connector Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 7 | - |
| 6 | Repair the wiring harness or the wiring as necessary. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 7 | - |
| 7 |
|
Go to Step 2 | Go to Step 8 |
| 8 | Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? |
Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information | System OK |