Conditions for Clearing the DTC
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- 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 non-emission related diagnostic.
- Clear the DTC with a scan tool.
DTC P0A82 (ESB Fan Stuck Off)
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Starting and Charging Schematics (Except HP2)
or Starting and Charging Schematics (HP2) Connector End View Reference: Engine Electrical Connector End Views DEFINITION: The energy storage box (ESB) fan is inoperative. |
||||
| 1 | Did you perform the Engine Electrical Diagnostic System Check? | - | Go to Step 2 | Go to Diagnostic System Check - Engine Electrical |
| 2 |
|
- | Go to Blower Motor Malfunction in HVAC Systems - Automatic | Go to Step 3 |
| 3 |
|
- | Go to Step 8 | Go to Step 4 |
| 4 | Connect a test lamp between the low reference circuit of the ESB fan and battery positive voltage. Does the test lamp illuminate? |
- | Go to Step 5 | Go to Step 7 |
| 5 | Connect a test lamp between the battery positive voltage circuit of the ESB fan and a good ground. Does the test lamp illuminate? |
- | Go to Step 8 | Go to Step 6 |
| 6 | Repair the battery positive voltage circuit of the ESB fan. Refer to Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 14 | - |
| 7 | Repair the ground circuit of the ESB fan. Refer to Wiring Repairs
in Wiring Systems. Did you complete the repair? |
- | Go to Step 14 | - |
| 8 |
|
0 V OFF and 7 V ON | Go to Step 10 | Go to Step 9 |
| 9 | Test the ESB fan control circuit of the ESB fan for an open, short to ground, or short to voltage. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 14 | Go to Step 11 |
| 10 | Inspect for poor connections at the harness connector of the ESB fan. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 14 | Go to Step 13 |
| 11 | Inspect for poor connections at the harness connector of the energy storage control module (ESCM). Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 14 | Go to Step 12 |
| 12 | Replace the ESCM. Refer to Energy Storage Control Module Replacement (5.3L Engine w/RPO HP2)
. Did you complete the replacement? |
- | Go to Step 14 | - |
| 13 | Replace the ESB fan. Refer to Energy Storage Box (ESB) Fan Replacement (5.3L Engine w/RPO HP2)
. Did you complete the replacement? |
- | Go to Step 14 | - |
| 14 | Operate the system in order to verify the repair. Did you correct the condition? |
- | System OK | Go to Step 2 |