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Home >> Chevrolet >> 2023 >> Tahoe SSV >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Engine Controls And Fuel - 3.0L (Lm2) Diesel - Diagnostic Information And Procedures (3 Of 5)) >> Diagnostic Information and Procedures >> DTC P1098 or P26BB >> 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: Cooling System Description and Operation (LM2)

Circuit Description
5 V Reference Regulated voltage supplied by the control module.
Serial Data Digitally encoded information for communication between devices.
Low Reference Grounded through the control module.
Component Description
K20 Engine Control Module The control module contains a microprocessor used to process input data to control outputs.
Q74 Engine Coolant Bypass Valve The control module controls a series of actuators to ensure optimal engine performance. The control module does this by reading values from a variety of sensors, interprets the data and adjusts the engine actuators accordingly.
The component is actuated by a bidirectional DC motor.
Q74 is part of the component: Q97 Engine Coolant Flow Control Valve

The valve controls the distribution of coolant through the following components:

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