Conditions for Clearing the DTC
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.
- The Conditions for Setting the DTC are no longer present.
- A history DTC will clear after 40 malfunction-free ignition cycles.
- The Powertrain Control Module (PCM) receives the clear code command from the scan tool.
DTC P0622
| Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Starting and Charging Schematics Connector End View Reference: Engine Electrical Connector End Views |
||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | - | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 |
|
5-95% | Go to Step 3 | Go to Step 4 |
| 3 | With the scan tool command the generator OFF. Does the GEN - F Terminal equal the specified value? |
0% | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 4 |
| 4 |
|
100% | Go to Charging System Test | Go to Step 5 |
| 5 | Test the generator field duty cycle signal circuit for a short or open. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 8 | Go to Step 6 |
| 6 | Inspect for poor connections at the harness connector of the PCM. Refer to Connector Repairs
. Did you find and correct the condition? |
- | Go to Step 8 | Go to Step 7 |
| 7 | Replace the PCM. Refer to Control Module References
for replacement, setup, and programming. Did you complete the repair? |
- | Go to Step 8 | - |
| 8 |
|
- | Go to Step 2 | System OK |