Diagnostic Aids
WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect the KS for proper installation. A knock sensor that is loose or over torqued may cause the DTC to set.
- If DTCs P0327 and P0332 are set at the same time, inspect for poor connections at the KS harness jumper, located at the left rear side of the intake manifold.
- For an intermittent, refer to Testing for Intermittent Conditions and Poor Connections .
IMPORTANT:
If the KS is dropped, the sensor must be replaced.
DTC P0327 or P0332
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Engine Controls Schematics Connector End View Reference: Engine Controls Component Views or Powertrain Control Module Connector End Views |
||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | - | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 |
IMPORTANT:
If an engine knock can be heard, repair the engine mechanical condition before proceeding with this diagnostic.
|
- | Go to Step 3 | Go to Diagnostic Aids |
| 3 |
|
93K-107K Ω | Go to Step 4 | Go to Step 6 |
| 4 |
IMPORTANT:
Do not tap on any plastic engine components.
|
- | Go to Step 5 | Go to Step 10 |
| 5 | Test the affected KS signal circuit between the powertrain control module (PCM) and the KS inline harness connector 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 8 |
| 6 |
|
- | Go to Step 12 | Go to Step 7 |
| 7 | Test for an intermittent and for a poor connection at the affected KS. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
- | Go to Step 12 | Go to Step 10 |
| 8 | Test for an intermittent and for a poor connection at the KS inline harness connector. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
- | Go to Step 12 | Go to Step 9 |
| 9 | Test for an intermittent and for a poor connection at the PCM. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
- | Go to Step 12 | Go to Step 11 |
| 10 | Replace the affected knock sensor. Refer to Knock Sensor Replacement
. Did you complete the replacement? |
- | Go to Step 12 | - |
| 11 | Replace the PCM. Refer to Control Module References
for replacement, setup, and programming. Did you complete the replacement? |
- | Go to Step 12 | - |
| 12 |
|
- | 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 |