Diagnostic Aids
- Test the IAT sensor at various temperature levels in order to evaluate the possibility of a skewed sensor. A skewed sensor can result in a driveability condition.
- If the vehicle has set overnight, the IAT sensor and the ECT sensor values should display within 3°C (5°F).
- For an intermittent condition, refer to Intermittent Conditions .
DTC P1111
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Engine Controls Schematics Connector End View Reference: 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 P0113 set? |
Go to DTC P0113 | Go to Step 3 |
| 3 | Observe the intake air temperature (IAT) sensor parameter with a scan tool while moving the IAT sensor connector and the engine control module (ECM) connector. Refer to Inducing Intermittent Fault Conditions
in Wiring Systems. Does the scan tool indicate an abrupt change in value? |
Go to Step 5 | Go to Step 4 |
| 4 | Observe the IAT sensor parameter with a scan tool while moving the wiring harness between the IAT sensor and the ECM. Refer to Inducing Intermittent Fault Conditions
in Wiring Systems. Does the scan tool indicate an abrupt change in value? |
Go to Step 6 | Go to Diagnostic Aids |
| 5 | Repair the connector/terminal as necessary. Refer to Connector Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 7 | - |
| 6 | Repair the harness/wiring as necessary. Refer to 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 |