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Home >> Chevrolet >> 2022 >> Tahoe PPV, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Engine Controls And Fuel - 3.0L (Lm2) Diesel - Diagnostic Information And Procedures (4 Of 5)) >> Diagnostic Information and Procedures >> DTC P157A or P16D7-P16D9 >> Circuit/System Description

Circuit/System Description

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Circuit Description
B+ - Relay Switch Supplied from a fuse.
Control - Component The output circuit is switched to 12 V to activate the component.
Control - Relay Coil The output circuit is switched to 12 V to activate the component.
Ground - Component Chassis Ground
Ground - Relay Coil Chassis Ground
Component Description
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.
KR200 Engine Controls Sensor Supply Voltage Relay A relay is a switch that is actuated by a solenoid.
KR200 is part of the component: X50A Engine Wiring Harness Junction Block
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