Diagnostic Aids
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.
- Inspect the connectors at the PCM, the OSS, and all other circuit connecting points for an intermittent condition. Refer to Testing for Intermittent Conditions and Poor Connections .
- Inspect the circuit wiring for an intermittent condition. Refer to Testing for Electrical Intermittents .
- Inspect for a disconnected output shaft speed sensor connector.
- Inspect for an open or shorted output shaft speed sensor wire.
- Inspect for a faulty output shaft sensor.
- Inspect for an internal fault of PCM.
DTC P0501
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| 1 | Did you perform the Diagnostic System Check - Vehicle? | - | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 |
IMPORTANT:
Before clearing the DTCs, use the scan tool in order to record the Freeze Frame and Failure Records for reference. The Clear Info function will erase the data.
NOTE:
Support the lower control arms in the normal horizontal position in order to avoid damage to the drive axles. Do not operate the vehicle in gear with the wheels hanging down at full travel.
|
- | Go to Diagnostic System Check - Vehicle | Go to Step 3 |
| 3 |
|
5 V | Go to Step 4 | Go to Step 7 |
| 4 | Measure the voltage from the OSS 5 volt reference circuit to the OSS low reference circuit. Does the voltage measure near the specified value? |
5 V | Go to Step 5 | Go to Step 8 |
| 5 | Measure the voltage from the OSS high signal circuit to the OSS low reference circuit. Does the voltage measure near the specified value? |
5 V | Go to Step 9 | Go to Step 6 |
| 6 | Test the OSS high signal circuit for the following conditions:
Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? |
- | Go to Step 12 | Go to Step 11 |
| 7 |
IMPORTANT:
The condition that affects this circuit may exist in other connecting branches of the circuit. Refer to Power Distribution Schematics
for complete circuit distribution. Test the OSS 5 volt reference circuit for the following conditions:
|
- | Go to Step 12 | Go to Step 11 |
| 8 | Test the OSS low reference circuit for an open or short to voltage. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 12 | Go to Step 11 |
| 9 |
|
- | Go to Step 12 | Go to Step 10 |
| 10 | Replace the OSS. Refer to Output Speed Sensor Replacement
. Did you complete the repair? |
- | Go to Step 12 | - |
| 11 | Replace the PCM. Refer to Control Module References
for replacement, setup, and programming. Did you complete the repair? |
- | Go to Step 12 | - |
| 12 | In order to verify your repair, perform the following procedure:
Has the test run and passed? |
- | Go to Step 13 | Go to Step 2 |
| 13 | With the scan tool, observe the stored information, capture info and DTC info. Does the scan tool display any DTCs that you have not diagnosed? |
- | Go to Diagnostic Trouble Code (DTC) List - Vehicle | System OK |