2010 Cadillac CTS Sedan AWD V6-3.6L Page 776
Conditions for Running the DTC
Ignition ON.
Conditions for Setting the DTC
C1100 00
If the vacuum sensor 5 V reference circuit is greater than 4.9 V for more than 100 m/sec.
C1100 01
The EBCM detects a voltage greater than 4.9 V for more than 100 m/sec on the vacuum sensor 5 V reference circuit.
C1100 02
The EBCM detects a voltage less than 0.2 V for more than 100 m/sec on the vacuum sensor 5 V reference circuit.
C1100 08, C1100 09, and C1100 5A
* The vacuum sensor signal is not plausible.
* Defective wiring vacuum sensor, or microprocessor feedback may cause erratic pressure sensor fault.
Action Taken When the DTC Sets
The brake warning indicator turns ON.
Conditions for Clearing the DTC
* A current DTC clears when the diagnostic runs and passes.
* The EBCM will turn OFF the indicator in the next ignition cycle.
Reference Information
Schematic Reference
Hydraulic Brake Schematics (See: Brakes and Traction Control/Hydraulic System/Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
ABS Description and Operation (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Description and Operation)
Electrical Information Reference
* 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 Testing
1. Ignition OFF, disconnect the harness connector at the brake booster vacuum sensor.
2. Ignition OFF, test for less than 10 ohm between the low reference circuit terminal 2 and ground.
瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the EBCM.
3. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 3 and ground.
瀚慖f less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,
replace the EBCM.
瀚慖f greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the EBCM.
4. Ignition ON, test for 4.5-5.2 V between the 5 V reference circuit terminal 3 and the signal circuit terminal 1.
瀚慖f less than the specified range, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the EBCM.
