2010 Cadillac CTS Sedan AWD V6-3.6L Page 775

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2010 Cadillac CTS Sedan AWD V6-3.6L Page 775



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit



Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information.



Circuit/System Verification



1. Engine running measure and record the voltage at the battery terminals. Verify that the battery voltage is 12.6-15.5 V



瀚慖f not within the specified range, refer to Charging System Test (See: Starting and Charging/Testing and Inspection/Component Tests



and General Diagnostics/Charging System Test)



2. Engine running, observe the scan tool EBCM Battery Voltage Signal parameter. The reading should be between 12.6 and 15.5 V



瀚慖f not within the specified range, replace the EBCM.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



Control Module References (See: Testing and Inspection/Programming and Relearning) for EBCM replacement, setup and programming.



C1100



DTC C1100



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC C1100 00



- Vacuum Sensor Out of Range



DTC C1100 01



- Vacuum Sensor Short to Voltage



DTC C1100 06



- Vacuum Sensor Short to Ground



DTC C1100 5A



- Vacuum Sensor Not Plausible



Diagnostic Fault Information



Circuit/System Description



The brake booster vacuum sensor measures the vacuum in the brake booster assembly. The electronic brake control module (EBCM) supplies a 5 V



reference and a low reference circuit to the brake booster vacuum sensor. The vacuum sensor supplies a voltage signal in relation to the pressure in



the brake booster to the EBCM.

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