Diagnostic Aids
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. 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 short to ground in the ECT sensor signal circuit could result in a DTC P1114.
- For an intermittent condition, refer to Intermittent Conditions .
DTC P1114
| 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-Engine Controls? | Go to Step 2 | Go to Diagnostic System Check - Engine Controls |
| 2 | Observe the DTC information with a scan tool. Is DTC P0117 set? |
Go to DTC P0117 | Go to Step 3 |
| 3 | Observe the engine coolant temperature (ECT) sensor parameter with a scan tool while moving the ECT sensor connector and the powertrain control module (PCM) connector. Does the scan tool indicate an abrupt change in value? |
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 ECT wiring or the wiring harness 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 | System OK |