Workshop Manuals Factory service & repair Vauxhall
Vauxhall Astra J07 · Brakes
07 · Brakes

DTC C1100

Make
Vauxhall
Model
Astra J
Section
Diagnostic Information and Procedures › Miscellaneous › DTC C1100
BrakesDTC C1100

DTC C1100

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 Descriptors

DTC C1100 00: Brake Pressure Sensor 2 Malfunction
DTC C1100 01: Brake Pressure Sensor 2 Short to Battery
DTC C1100 02: Brake Pressure Sensor 2 Short to Ground
DTC C1100 08: Brake Pressure Sensor 2 Performance - Signal Invalid
DTC C1100 09: Brake Pressure Sensor 2 Too Fast Transitions
DTC C1100 5A: Brake Pressure Sensor 2 Not Plausible

Diagnostic Fault Information



Circuit
Short to Ground
Open/High Resistance
Short to Voltage
Signal Performance

5V Reference
C1100 00, C1100 02
C1100 00, C1100 08
C1100 00, C1100 01
-

Signal
C1100 00, C1100 02
C1100 00
C1100 00, C1100 01
C1100 08, C1100 09, C1100 5A

Low Reference
-
C1100 00
-
-
 

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 01

A short to voltage or open/high resistance is detected on the vacuum sensor signal circuit.

C1100 02

A short to ground or open/high resistance is detected on the vacuum sensor signal circuit.

C1100 08, C1100 09

A invalid signal is detected on the vacuum sensor signal circuit.

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


Connector End View Reference

Component Connector End Views


Description and Operation

Hydraulic Brake System Description and Operation


Electrical Information Reference


Scan Tool Reference

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 Ω 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 5 V reference circuit terminal 3 and ground.
⇒ If greater than the specified range, test the 5 V 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 5 V 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 0.3 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 Ω 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 after completing the diagnostic procedure.

•  Control Module References for EBCM replacement, programming and setup

Parts & tools for this job For Vauxhall Astra

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