Conditions for Clearing the MIL/DTC
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
- The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
- The DTC can be cleared by using the scan tool Clear DTC Information function.
DTC P0622
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Starting and Charging Schematics Connector End View Reference: Engine Control Module (ECM) Connector End Views for the 3.9L (LZ9) engine, Powertrain Control Module (PCM) Connector End Views for the 3.5L (LX9) engine or 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 Signal 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 GEN-F Terminal Signal circuit for a short voltage, an open or a high resistance 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 powertrain control module (PCM)/engine control module (ECM). Refer to Connector Repairs
. Did you find and correct the condition? |
- | Go to Step 8 | Go to Step 7 |
| 7 |
IMPORTANT:
The replacement PCM/ECM must be programmed. Replace the PCM/ECM. Refer to Control Module References
for replacement, setup and programming.Did you complete the replacement? |
- | Go to Step 8 | - |
| 8 |
|
- | Go to Step 2 | System OK |