Conditions for Clearing the MIL/DTC
WARNING: This page is about a different car, the 2007 Saturn Vue. 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 P0651
| Step |
Action |
Values |
Yes |
No |
| Schematic Reference: Engine Controls Schematics |
| 1 |
Did you perform the Diagnostic System Check - Vehicle? |
- |
Go to Step 2 |
Go to Diagnostic System Check - Vehicle |
| 2 |
- Observe the Freeze Frame/Failure Records for this DTC.
- Turn OFF the ignition for 90 seconds.
- Start the engine.
- Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.
Did the DTC fail this ignition? |
- |
Go to Step 3 |
Go to Testing for Intermittent Conditions and Poor Connections |
| 3 |
- Visually and physically inspect the engine control module (ECM) and engine grounds. Ensure that the grounds are clean and secure.
- If a condition is found, repair as necessary. Refer to Wiring Repairs
.
Did you find and correct a condition? |
- |
Go to Step 12 |
Go to Step 4 |
| 4 |
- Turn OFF the ignition.
- Disconnect the manifold absolute pressure (MAP) electrical connector.
- Turn ON the ignition, with the engine OFF.
- Measure the voltage between the 5-volt reference circuit of the MAP sensor and a good ground with a DMM.
Is the voltage within the specified range? |
4.8-5.2 V |
Go to Step 6 |
Go to Step 5 |
| 5 |
Is the voltage more than the specified value? |
5.2 V |
Go to Step 9 |
Go to Step 7 |
| 6 |
- Connect MAP sensor electrical connector.
- Disconnect throttle position sensor.
- Measure the voltage between the 5-volt reference circuit of the throttle position sensor 2 and a good ground with a DMM.
Is the voltage within the specified range? |
4.8-5.2 V |
Go to Testing for Intermittent Conditions and Poor Connections |
Go to Step 10 |
| 7 |
- Monitor the DMM while disconnecting all other devices connected to 5-volt reference circuit 2, one at a time.
- If voltage changes when one of the above components are disconnected, replace the component. Refer to the appropriate replacement procedure.
Was a component replaced? |
- |
Go to Step 12 |
Go to Step 8 |
| 8 |
- Turn OFF the ignition.
- Disconnect the ECM.
- Test the 5-volt reference circuit 2 for a short to ground or a short to any sensor low reference circuit. Refer to Wiring Repairs
.
Did you find and correct a condition? |
- |
Go to Step 12 |
Go to Step 11 |
| 9 |
- Turn OFF the ignition.
- Disconnect the ECM.
- Turn ON the ignition, with the engine OFF.
- Inspect the following circuits for a short to voltage:
- The MAP sensor signal circuit
- The accelerator pedal position (APP) 1 sensor signal circuit
- The throttle position (TP) 2 sensor signal circuit
- The 5-volt reference circuit for all sensors listed above.
- If a condition is found, repair as necessary. Refer to Wiring Repairs
.
Did you find and correct a condition? |
- |
Go to Step 12 |
Go to Step 11 |
| 10 |
Replace the MAP sensor. Refer to Manifold Absolute Pressure Sensor Replacement
.
Did you complete the replacement? |
- |
Go to Step 12 |
- |
| 11 |
Replace the ECM. Refer to Control Module References
for replacement, setup, and programming.
Did you complete the replacement? |
- |
Go to Step 12 |
- |
| 12 |
- Clear the DTCs with a scan tool.
- Turn OFF the ignition for at least 90 seconds.
- Start the engine.
- Operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.
Did the DTC fail this ignition? |
- |
Go to Step 2 |
Go to Step 13 |
| 13 |
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 |
System OK |