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Home >> Chevrolet >> 2022 >> Tahoe SSV >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Controls And Fuel - 3.0L (Lm2) Diesel - Diagnostic Information And Procedures (5 Of 5)) >> Diagnostic Information and Procedures >> Water-in-Fuel Lamp Diagnosis >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different variant/trim than selected.

For an overview of the component/system, refer to: Fuel System Description

Circuit Description
5 V Reference Regulated voltage supplied by the control module.
Signal The control module input circuit has an internal resistance connected to 5 V.
Low Reference Grounded through the control module.
Component Description
E11A Fuel Heater/Water in Fuel Sensor The electrical fuel heater is integrated into the fuel filter. The sensor uses two electrodes to measure the electric conductivity of the fluid in the fuel filter assembly. Since water has a higher conductivity than diesel fuel, it can be determined how much water is in the filter.
K111 Fuel Pump Driver Control Module The control module contains a microprocessor used to process input data to control outputs.
The control module communicates with the engine control module via serial data.
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