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The ECM detects a low voltage signal on the TCC brake signal circuit for more than 2 seconds P0573 00 The ECM detects a high voltage signal on the TCC brake signal circuit for more than 2 seconds Action Taken When the DTC Sets The cruise control system becomes inoperative. The ECM stores the DTC to memory. The ECM will record the operating conditions at the time the diagnostic failed. The ECM Conditions for Clearing the DTC The condition for setting the DTC no longer exists. A history DTC will clear once 40 malfunction-free ignition cycles have occurred. Diagnostic Aids Ensure all the stop lamps operate properly. Refer to Exterior Lighting Systems Description Reference Information Schematic Reference Cruise Control Schematics Exterior Lights Schematics Connector End View Reference Component Connector End Views Description and Operation Cruise Control Description and Operation
2008 Chevrolet Silverado 1500 2008 ENGINE Cruise Control - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs Scan Tool Reference Control Module References for scan tool information Circuit/System Testing 1. Disconnect the harness connector of the stop lamp switch. 2. Ignition ON, test for B+ between the stop lamp switch connector terminal B and ground. If the reading is less than specified, test the supply circuit for a short to ground or an 3. Verify the BPP Circuit Signal data parameter displays released. If the parameter displays applied, test the TCC Brake signal circuit for a short to 4. Connect a 3 amp fused jumper between stop lamp switch harness terminals A and B. Verify the BPP Circuit Signal data parameter displays applied. If the parameter displays released, test the TCC Brake Signal circuit for a short to 5. If all circuits test normal, test or replace the stop lamp switch. Component Testing Stop Lamp Switch Test 1. Ignition OFF, disconnect the stop lamp switch. 2. With the brake pedal released, test for infinite resistance between terminals A and B of the switch. If resistance is not as specified, replace the stop lamp switch. 3. With the brake pedal released, test for less than 1.0 ohm resistance between terminals C and D of the switch. If resistance is not as specified, replace the stop lamp switch. 4. With the brake pedal applied, test for less than 1.0 ohm resistance between terminals A and
2008 Chevrolet Silverado 1500 2008 ENGINE Cruise Control - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
B of the switch. If resistance is not as specified, replace the stop lamp switch. 5. With the brake pedal applied, test for infinite resistance between terminals C and D of the switch. If resistance is not as specified, replace the stop lamp switch. Repair Procedures Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Stop Lamp Switch Replacement (Non-Adjustable Pedal) or Stop Lamp Switch Control Module References for ECM replacement, setup, and programming. DTC P0575 Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach. Diagnostic Procedure Instructions provides an overview of each diagnostic category. DTC Descriptor DTC P0575 00 Cruise Control Switch Signal Circuit Circuit/System Description When a cruise control function switch is activated, the body control module (BCM) detects a Conditions for Running the DTC The ignition is ON. Conditions for Setting the DTC The ECM receives an invalid cruise control switch status serial data message from the BCM.
2008 Chevrolet Silverado 1500 2008 ENGINE Cruise Control - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
This diagnostic runs continuously. Action Taken When the DTC Sets The Cruise Control System is disabled. The ECM stores the DTC information into memory when the diagnostic runs and fails. The malfunction indicator lamp (MIL) will not illuminate. The ECM records the operating conditions at the time the diagnostic fails. The ECM stores Conditions for Clearing the DTC The DTC becomes history when the conditions for setting the DTC are no longer present. The history DTC clears after 40 consecutive warm-up cycles. Reference Information Schematic Reference Cruise Control Schematics Connector End View Reference Component Connector End Views Description and Operation Cruise Control Description and Operation Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs Scan Tool Reference Control Module References for scan tool information Circuit/System Verification
2008 Chevrolet Silverado 1500 2008 ENGINE Cruise Control - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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