DTC P0A83 ESB Fan Stuck On
Circuit Description
The energy storage box (ESB) module provides a variable voltage signal to the ESB fan through the fan speed signal circuit. The ESB fan changes speed based on the voltage from the ESB module.
P0A82 is for the hybrid battery pack cooling fan stuck off.
Conditions for Running the DTC
| • | Engine is running for 30 seconds. |
| • | The starter/generator control module (SGCM) has received voltage on the ignition 0 voltage circuit. |
| • | The SGCM has turned ON and no configuration DTC is present. |
| • | This diagnostic shall run every 100 milliseconds. |
| • | Reference voltage is stable and accurate. |
Conditions for Setting the DTC
The energy storage control module (ESCM) determines that the ESB fan is stuck off.
Action Taken When the DTC Sets
| • | The powertrain control module (PCM) stores the DTC information into memory when the diagnostic runs and fails. |
| • | The malfunction indicator lamp (MIL) will not illuminate. |
| • | The driver information center (DIC), if equipped, may display a message. |
Conditions for Clearing the DTC
| • | 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. |
Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference: Starting and Charging Schematics 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 | |
2 |
Does the energy storage box (ESB) fan turn OFF? | -- | Go to Blower Motor Malfunction in HVAC Systems - Automatic | Go to Step 3 |
3 |
Does the test lamp illuminate? | -- | 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 |
Does the voltmeter read the correct values for each state? | 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 Generator Battery Control Module Replacement . Did you complete the replacement? | Go to Step 14 | -- | |
13 | Replace the ESB fan. Refer to Generator Battery Vent Fan Replacement . 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 |
