vauxhall Workshop Repair Guides

Vauxhall Workshop Service and Repair Manuals

ABOUT US
Speedometer and/or Odometer Inaccurate or Inoperative > < DTC B097F

Astra J

DTC P0461-P0464

Diagnostic Instructions

•  Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
•  Review Strategy Based Diagnosis for an overview of the diagnostic approach.
•  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0461 00: Fuel Level Sensor 1 Performance
DTC P0461 00: Fuel Level Sensor Performance
DTC P0462 00: Fuel Level Sensor 1 Circuit Low Voltage
DTC P0462 00: Fuel Level Sensor Circuit Low Voltage
DTC P0463 00: Fuel Level Sensor 1 Circuit High Voltage
DTC P0463 00: Fuel Level Sensor Circuit High Voltage
DTC P0464 00: Fuel Level Sensor Circuit Intermittent

Diagnostic Fault Information



Circuit
Short to Ground
Open/High Resistance
Short to Voltage
Signal Performance

Fuel Level Sensor Signal
P0462 00
P0463 00, P0464 00, 1
P0463 00
P0461 00

Low Reference
-
P0463 00, P0464 00, 1
P0463 00
P0461 00

1. Fuel gauge inoperative
 

Circuit/System Description

The fuel level sensor changes resistance based on fuel level. The engine control module (ECM) monitors the signal circuit of the fuel level sensor in order to determine the fuel level. When the fuel tank is full, the resistance of the fuel level sensor is low and the ECM senses a low signal voltage on the signal circuit of the fuel level sensor. When the fuel tank is empty, the resistance of the fuel level sensor is high and the ECM senses a high signal voltage. The ECM uses the signal circuit of the fuel level sensor in order to calculate the percentage of remaining fuel in the tank. The ECM sends the fuel level percentage via High Speed CAN-Bus to the body control module (BCM). The BCM then sends the fuel level percentage via Low Speed CAN-Bus to the instrument cluster in order to control the fuel gauge.

Conditions for Running the DTC

•  The engine is running.
•  The system voltage is between 11-16 V.

Conditions for Setting the DTC

P0461 00

•  The ECM detects a difference between the fuel consumed by the engine and change of the fuel level signal of less than 1 L (0.26 gal) over a range of 30 L (7.92 gal) or 45.6% of the primary fuel tank.
•  The above condition is present for about 300 s.

P0462 00

•  The signal voltage is less than 0.25 V.
•  The above conditions must be met for 5 s.

P0463 00

•  The signal voltage is greater than 4.7 V.
•  The above conditions must be met for 5 s.

P0464 00

•  The fuel level change is greater than 10%.
•  The above condition is present for greater than 30 s.
•  DTC P0464 runs and fails 2 out of 3 test cycles.

Action Taken When the DTC Sets

•  P0461 00, P0462 00, P0463 00, and P0464 00 are Type B DTCs.
•  The fuel gauge defaults to empty.
•  The low fuel indicator illuminates.

Conditions for Clearing the DTC

•  P0461 00, P0462 00, P0463 00, and P0464 00 are Type B DTCs.
•  The DTC becomes history when the conditions for setting the DTC are no longer present.
•  The history DTC clears after 40 malfunction-free warm-up cycles.

Reference Information


Schematic Reference

Instrument Cluster Schematics


Connector End View Reference

Component Connector End Views


Description and Operation

Instrument Cluster Description and Operation


Electrical Information Reference


DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions


Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON, observe the scan tool ECM - Fuel Level Sensor parameters. The reading should be between 0.5-3.5 V and vary with fuel level.
2. Ignition ON, perform the Instrument Cluster Gauge Sweep test with the scan tool, verify that the fuel level gauge sweeps from its low to high position.
⇒ If the fuel level gauge does not sweep, replace the P16 Instrument Cluster.
3. Command the All Indicators test ON and OFF with the scan tool, verify that the low fuel level indicator turns ON and OFF.
⇒ If the low fuel level indicator always stays on or always off, replace the P16 Instrument Cluster.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the K20 Engine Control Module as listed below.
  •  LDD, LDE, or LLU - X1
  •  LPV, LPL, LBS, or LBX - X2
2. Ignition ON, test for less than 0.3 V between either the low reference circuit or signal circuit terminals listed below and ground.
  •  LDD, LDE, or LLU - low reference circuit terminal 38 or signal circuit terminal 52
  •  LPV or LPL - low reference circuit terminal 17 or signal circuit terminal 30
  •  LBS or LBX - low reference circuit terminal 39 or signal circuit terminal 38
⇒ If greater than the specified range, test both the low reference circuit and the signal circuit for a short to voltage. If the circuits test normal, test or replace the B46 Fuel Level Sensor.
3. Ignition OFF, test for infinite resistance between either the low reference circuit or signal circuit terminals listed below and ground.
  •  LDD, LDE, or LLU - low reference circuit terminal 38 or signal circuit terminal 52
  •  LPV or LPL - low reference circuit terminal 17 or signal circuit terminal 30
  •  LBS or LBX - low reference circuit terminal 39 or signal circuit terminal 38
⇒ If less than the specified range, test both the low reference circuit and the signal circuit for an open/high resistance. If the circuits test normal, test or replace the B46 Fuel Level Sensor.
4. Ignition OFF, test for 20-300 Ω between the signal circuit terminal listed below and the low reference circuit terminal listed below.
  •  LDD, LDE, or LLU - low reference circuit terminal 38 or signal circuit terminal 52
  •  LPV or LPL - low reference circuit terminal 17 or signal circuit terminal 30
  •  LBS or LBX - low reference circuit terminal 39 or signal circuit terminal 38
⇒ If not within the specified range, test both the signal circuit and the low reference circuit for an open/high resistance. If the circuits test normal, test or replace the B46 Fuel Level Sensor.
5. If all circuits test normal, test or replace the K20 Engine Control Module.

Component Testing

Static Test

1. Ignition OFF, disconnect the harness connector at the B46 Fuel Level Sensor.
2. Test for 40-250 Ω between the signal terminal 1 and the low reference terminal 2.
⇒ If not within the specified range, replace the B46 Fuel Level Sensor.

Dynamic Test

1. Ignition OFF, disconnect the harness connector at the B46 Fuel Level Sensor.
2. Remove the B46 Fuel Level Sensor from the fuel tank.
3. Sweep the sensor through the entire range while monitoring the resistance between the signal terminal 1 and the low reference terminal 2. The resistance should vary between less than 45 Ω and greater than 250 Ω without any spikes or dropouts.
⇒ If not within the specified range or is erratic, replace the B46 Fuel Level Sensor.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•  Control Module References for the ECM or instrument cluster replacement, setup and programming

Speedometer and/or Odometer Inaccurate or Inoperative > < DTC B097F