DTC C0131
DTC C0131 |
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 Descriptors |
DTC C0131 00
Traction Control System Pressure Circuit Malfunction
DTC C0131 5A
Traction Control System Pressure Circuit Not Plausible
Diagnostic Fault Information |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
5V Reference
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C0131 00
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C0131 00
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C0131 00
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-
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Signal
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C0131 00
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C0131 00
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-
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C0131 5A
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Circuit/System Description |
The brake pressure sensor is integral to the brake pressure modulator valve assembly. The electronic brake control module (EBCM) monitors the brake pressure sensor supply voltage and the signal voltage. The body control module (BCM) sends a serial data message when the brake pedal is applied.
Conditions for Running the DTC |
Ignition ON.
Conditions for Setting the DTC |
C0131 00
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A short to voltage is detected on the 5 V reference circuit for 0.1 s
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A short to ground or an open/high resistance is detected on the 5 V reference circuit or signal circuit for 0.1 s
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C0131 5A
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The brake pressure sensor signal is not plausible with the vehicle acceleration or deceleration.
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The EBCM detected an invalid or erratic brake pressure sensor signal.
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The brake pressure sensor signal is not plausible with the brake switch signal.
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Action Taken When the DTC Sets |
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The EBCM disables the ABS, traction control, stability control and hill start assist for the duration of the ignition cycle.
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The traction control/stability control-active indicator turns ON.
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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
Antilock Brake System Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
ABS 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 for scan tool information
Circuit/System Verification |
Ignition ON, observe the scan tool Brake Pressure Sensor parameter. The reading should be 0 V, when brake pedal is released and greater than 1 V, when the brake pedal is applied.
Circuit/System Testing |
1. |
Verify that DTC C0131 5A is not present.
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2. |
If DTC C0131 5A is present, perform the
Brake Pressure Modulator Valve Pressure Sensor Calibration
.
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3. |
Replace the brake pressure modulator valve assembly and verify the DTC does not reset.
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4. |
If the DTC resets replace the K17 Electronic Brake Control Module.
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Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References