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). Refer to TEMPERATURE VS RESISTANCE .
- A high resistance on either the IAT sensor signal circuit or the IAT sensor low reference circuit may not set a DTC. Refer to Circuit Testing in Wiring Systems.
- For an intermittent condition, refer to Intermittent Conditions .
DTC P0113
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Engine Controls Schematics Connector End View Reference: Engine Control Module (ECM) 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 |
|
4 minutes | Go to Step 4 | Go to Step 3 |
| 3 |
|
- | Go to Step 4 | Go to Diagnostic Aids |
| 4 |
|
5.2 V | Go to Step 5 | Go to Step 6 |
| 5 |
IMPORTANT:
The sensor may be damaged if the circuit is shorted to a voltage source. Test the signal circuit of the IAT sensor for a short to voltage. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems.Did you find and correct the condition? |
- | Go to Step 15 | Go to Step 12 |
| 6 |
IMPORTANT:
The DTCs must be cleared or a temperature of 20°C (68°F) will be displayed on the scan tool.
|
130°C (266°F) | Go to Step 10 | Go to Step 7 |
| 7 |
|
130°C (266°F) | Go to Step 9 | Go to Step 8 |
| 8 | Test the IAT sensor signal circuit for an open circuit or for high resistance. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 15 | Go to Step 12 |
| 9 | Test the IAT sensor low reference circuit for an open or for a high resistance. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 15 | Go to Step 12 |
| 10 | Test the IAT sensor signal circuit for a short to any 5-volt reference circuit. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 15 | Go to Step 11 |
| 11 | Test for shorted terminals and for poor connections at the IAT sensor. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 15 | Go to Step 13 |
| 12 | Test for shorted terminals and for poor connections at the engine control module (ECM). Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 15 | Go to Step 14 |
| 13 | Replace the IAT sensor. Refer to Intake Air Temperature (IAT) Sensor Replacement
. Did you complete the replacement? |
- | Go to Step 15 | - |
| 14 | Replace the ECM. Refer to Engine Control Module (ECM) Replacement
. Did you complete the replacement? |
- | Go to Step 15 | - |
| 15 |
|
- | Go to Step 2 | Go to Step 16 |
| 16 | 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 |