Fuel Gauge Inaccurate or Inoperative
Diagnostic Instructions
Circuit/System Description
The instrument cluster displays the fuel level based on the
information from the engine control module (ECM). The ECM converts
the data from the fuel level sensors to a fuel level signal. The
ECM sends the fuel level signal via a High Speed CAN-Bus signal to
the body control module (BCM). The BCM then sends the information
via a Low Speed CAN-Bus signal to the instrument cluster to display
the fuel level. If the fuel level falls below 11% the instrument
cluster switches the low fuel level indicator on.
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
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
| 1. |
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. |
| 2. |
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. |
| 3. |
If the fuel level gauge does
sweep and the low fuel level indicator changes between ON and OFF,
replace the K20 Engine Control Module. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
Control Module References for instrument cluster or ECM
replacement, setup, and programming
|
