Circuit Description
The PCM uses a common 5.0 Volt Reference circuit as a sensor feed to the fuel level sensor (left tank)
The PCM monitors the voltage on the 5.0 Volt Reference circuit. If the voltage is out of range, this DTC sets.
Conditions for Running the DTC
The engine operating.
Conditions for Setting the DTC
| • | The 5.0 volt reference circuit is out of range. |
| • | The above condition is present for greater than 2 seconds. |
Action Taken When the DTC Sets
| • | The PCM illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails. |
| • | The PCM records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the PCM stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the PCM records the operating conditions at the time of the failure. The PCM writes the conditions to the Freeze Frame and updates the Failure Records. |
Conditions for Clearing the MIL/DTC
| • | The PCM turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail. |
| • | A last test failed, or current DTC, clears when the diagnostic runs and does not fail. |
| • | A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic. |
| • | Use a scan tool in order to clear the MIL and the DTC. |
Diagnostic Aids
Important: Remove any debris from the PCM\TAC module connector surfaces before servicing the PCM\TAC module. Inspect the PCM\TAC module connector gaskets when diagnosing/replacing the modules. Ensure that the gaskets are installed correctly. The gaskets prevent contaminate intrusion into the PCM\TAC modules.
A fuel level sensor (right tank) signal circuit that is shorted to B+ may set this DTC.
Using the Freeze Frame and/or Failure Records data may aid in locating an intermittent condition. If you cannot duplicate the DTC, the information included in the Freeze Frame and/or Failure Records data can help determine how many miles since the DTC set. The Fail Counter and Pass Counter can also help determine how many ignition cycles the diagnostic reported a pass and/or a fail. Operate vehicle within the same freeze frame conditions (RPM, load, vehicle speed, temperature etc.) that you observed. This will isolate when the DTC failed. For an intermittent condition, refer to Symptoms .
Test Description
Number(s) below refer to the step number(s) on the Diagnostic Table.
-
This step will isolate the fuel level sensor signal circuit.
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This step checks for the fuel level sensor signal circuit for being shorted to the fuel pump feed circuit.
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This step checks for the fuel level sensor signal circuit for being shorted to ground.
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This step checks for the fuel level sensor signal circuit for being shorted to ground internally in the fuel tank.
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This step checks for the fuel level sensor signal circuit for being shorted to another circuit in the same PCM connector.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Powertrain On-Board Diagnostic (OBD) System Check? | -- | ||
2 |
Does the DMM display a voltage greater than the specified value? | 0V | ||
3 |
Does the DMM display a voltage greater than the specified value? | 0V | ||
4 |
Does the test lamp illuminate? | -- | ||
5 | Check the resistance between the fuel level sensor (left tank) signal circuit and the ground circuits at the fuel tank connector (fuel tank side). Does the DMM indicate a resistance less than the specified value? | 5ohms | ||
6 | Check the PCM harness for continuity between the fuel level sensor (left tank) and all the other circuits in the disconnected PCM connector. Does any of the circuits indicate a resistance within the specified range? | 0-5ohms | ||
7 | Repair the short to voltage on fuel level sensor (left tank) signal circuit. Is the action complete? | -- | -- | |
8 | Repair the short between the fuel level sensor (left tank) signal circuit and the fuel pump feed circuit. Is the action complete? | -- | -- | |
9 | Repair the short to ground on the fuel level sensor (left tank) signal circuit. Is the action complete? | -- | -- | |
10 | Repair the circuits that are shorted together. Is the action complete? | -- | -- | |
11 | Replace the fuel level sensor (left tank). Refer to Fuel Sender Assembly Replacement . Is the action complete? | -- | -- | |
12 |
Important: Program the replacement PCM. Refer to Powertrain Control Module/Throttle Actuator Control Module Replacement . Replace the PCM. Is the action complete? | -- | -- | |
13 |
Does the scan tool indicate that this test ran and passed? | -- | ||
14 | Select the Capture Info option and the Review Info option using the scan tool. Are any DTCs displayed that you have not been diagnosed? | -- | Go to applicable DTC table | System OK |
