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Home >> Chevrolet >> 2024 >> Tahoe Commercial, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Engine Controls And Fuel - 3.0L (Lm2) Diesel - Diagnostic Information And Procedures (3 Of 5)) >> Diagnostic Information and Procedures >> DTC P10D9, P20B9, P20BA-P20BC, P214F, or P21DD >> 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: Exhaust Aftertreatment System Description

Circuit Description
Control - Terminal 9 The output circuit is switched to 12 V to activate the component.
Control - Terminal 11 The output circuit is switched to ground to enable the component(s).
Component Description
E53 Reductant Tank Heater E53 is part of the component: A38 Reductant Pump and Sensor Assembly
The reductant freezes at -11°C (-12°F).To prevent the reductant from freezing, the reductant tank and the reductant line are heated.
K20 Engine Control Module The control module contains a microprocessor used to process input data to control outputs.
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.
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