C1100
DTC C1100
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
DTC C1100 00
-
Brake Pressure Sensor 2 Malfunction
DTC C1100 02
-
Brake Pressure Sensor 2 Short to Ground
DTC C1100 04
-
Brake Pressure Sensor 2 Open
DTC C1100 09
-
Brake Pressure Sensor 2 Too Fast Transitions
DTC C1100 5A
-
Brake Pressure Sensor 2 Not Plausible
Diagnostic Fault Information
Circuit/System Description
The brake booster vacuum sensor monitors the pressure in the brake booster. 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.
Conditions for Running the DTC
Ignition ON.
Conditions for Setting the DTC
C1100 00
* A short to ground, short to voltage or open/high resistance is detected on the 5 V reference circuit.
* The EBCM detected an erratic vacuum sensor signal.
C1100 02
A short to voltage is detected on the vacuum sensor signal circuit.
C1100 04
A short to ground or open/high resistance is detected on the vacuum sensor signal circuit.
C1100 5A
The vacuum sensor signal is not plausible.
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 [1][2]Electrical Diagrams
Connector End View Reference
Component Connector End Views Sunshade - Left (DH6)
Description and Operation
Brake Assist System Description and Operation Brake Assist System
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
Scan Tool Reference
Control Module References Control Module References for scan tool information
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the B19B Brake Booster Vacuum Sensor.
2. Test for less than 5 ohms between the low reference circuit terminal 2 and ground.
• If greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K17 Electronic Brake Control Module.
3. Ignition ON, test for 4.8-5.2 V between the 5V reference circuit terminal 3 and ground.
• If greater than the specified range, test the 5V reference circuit for a short to voltage. If the circuit tests normal, replace the K17 Electronic Brake Control Module.
• If less than the specified range, test the 5V reference circuit for an open/high resistance. If the circuit tests normal, replace the K17 Electronic Brake Control Module.
4. Ignition OFF, disconnect the harness connector at the K17 Electronic Brake Control Module.
5. Ignition ON, test for less than 0.5 V between the signal circuit terminal 1 at the B19B Brake Booster Vacuum Sensor harness connector and ground.
• If greater than the specified value, test the signal circuit for a short to voltage.
6. Ignition OFF, test for infinite resistance between the signal circuit terminal 1 and ground.
• If less than the specified value, test the signal circuit for a short to ground.
7. Test for less than 5 ohms between the signal circuit terminal 1 at the B19B Brake Booster Vacuum Sensor harness connector and terminal 22 at the K17 Electronic Brake Control Module harness connector.
• If greater than the specified value, test the signal circuit for an open/high resistance.
8. If all circuits test normal, replace the B19B Brake Booster Vacuum Sensor and verify the DTC does not reset. If the DTC resets, replace the K17 Electronic Brake Control Module.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
Control Module References Control Module References for EBCM replacement, programming and setup