Conditions for Clearing the MIL/DTC
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.
- The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
- A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
- A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
- Clear the MIL and the DTC with a scan tool.
DTC P0103
| 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 |
|
4.5 V | Go to Step 4 | Go to Step 3 |
| 3 |
|
- | Go to Step 4 | Go to Inducing Intermittent Fault Conditions in Wiring Systems and Intermittent Conditions |
| 4 |
|
- | Go to Step 14 | Go to Step 5 |
| 5 |
|
4.5 V | Go to Step 9 | Go to Step 6 |
| 6 |
|
- | Go to Step 17 | Go to Step 7 |
| 7 |
IMPORTANT:
All electrical components and accessories must be turned OFF.
|
5 ohm | Go to Step 11 | Go to Step 8 |
| 8 |
|
- | Go to Step 17 | Go to Step 12 |
| 9 |
IMPORTANT:
Disconnecting the harness connectors of the ECM may eliminate the short to voltage if the signal circuit is shorted to another ECM circuit.
|
- | Go to Step 17 | Go to Step 10 |
| 10 | Measure the resistance from the signal circuit of the MAF sensor to all other circuits at all ECM connectors with a DMM. Refer to Circuit Testing
in Wiring Systems. Is the resistance less than the specified value? |
infinity ohm | Go to Step 13 | Go to Step 12 |
| 11 | Test for an intermittent and for a poor connection at the MAF/IAT sensor. Refer to Testing for Intermittent Conditions and Poor Connections
andConnector Repairs
and Repairing Connector Terminals
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 17 | Go to Step 15 |
| 12 | Test for an intermittent and for a poor connection at the ECM. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
and Repairing Connector Terminals
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 17 | Go to Step 16 |
| 13 | Repair the circuits that are shorted together. Refer to Wiring Repairs
in Wiring Systems Did you complete the repair? |
- | Go to Step 17 | - |
| 14 | Repair the harness or the connections as necessary. Refer to Wiring Repairs
and Connector Repairs
andRepairing Connector Terminals
in Wiring Systems. Did you complete the repair? |
- | Go to Step 17 | - |
| 15 | Replace the MAF/IAT sensor. Refer to Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor Replacement
. Did you complete the replacement? |
- | Go to Step 17 | - |
| 16 | Replace the ECM. Refer to Engine Control Module (ECM) Replacement
. Did you complete the replacement? |
- | Go to Step 17 | - |
| 17 |
|
- | Go to Step 2 | Go to Step 18 |
| 18 | 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 |