PRE-RELEASE
DTC C0299
| DTC C0299 |
| Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
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| DTC Descriptor |
DTC C0299 5A
Brake Booster Large Vacuum Leak Detected Not Plausible
| Diagnostic Fault Information |
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
| Brake Booster Vacuum Sensor 5 V Reference | C1100 00, C1100 02 | C1100 00, C1100 08 | C1100 00, C1100 01 | - |
| Brake Booster Vacuum Sensor Signal | C1100 00, C1100 02 | C1100 00 | C1100 00, C1100 01 | C1100 08, C1100 09, C1100 5A |
| Brake Booster Vacuum Sensor Low Reference | - | C1100 00 | - | - |
| 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.
| Conditions for Running the DTC |
Ignition ON.
| Conditions for Setting the DTC |
The EBCM detected a too low vacuum in the brake booster assembly for 120 seconds.
| Action Taken When the DTC Sets |
The brake warning indicator turns ON.
| Conditions for Clearing the DTC |
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A current DTC clears when the diagnostic runs and passes.
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The EBCM will turn OFF the indicator in the next ignition cycle.
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| Reference Information |
Schematic Reference
Hydraulic Brake Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Brake Assist System Description and Operation
Electrical Information Reference
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Circuit Testing
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Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs
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Scan Tool Reference
Control Module References
| Circuit/System Testing |
| 1. |
Ignition ON, verify that DTC C1100 is not present.
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| 2. |
If DTC C1100 is present, refer to
DTC C1100
.
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| 3. |
Inspect the brake booster vacuum system for damage, leakage and correct installation. Refer to
Brake Assist System Diagnosis
.
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| 4. |
If the brake booster vacuum systems diagnoses 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 (EBCM).
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| Repair Instructions |
Perform the Diagnostic Repair Verification
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Power Brake Booster Vacuum Sensor Replacement
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Control Module References
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