DTC C0274, C0275, or C0280
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DTC C0274, C0275, or C0280
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DTC C0274 54
Isolation Valve High Temperature
DTC C0275 54
Dump Valve High Temperature
DTC C0280 54
Stability System Active Too Long High Temperature
Circuit/System Description
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The solenoid valves are integral parts of the brake pressure modulator valve assembly. The brake pressure modulator valve assembly contains an isolation solenoid valve and a dump solenoid valve for each wheel and a traction control/stability control supply solenoid valve and isolation solenoid valve for each brake circuit. The solenoid valves are not engaged during normal system operation. When the ABS, traction control or stability control operation is required the electronic brake control module (EBCM) turns the required solenoid valves ON.
Conditions for Running the DTC
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Ignition ON
Conditions for Setting the DTC
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Calculated solenoid valve temperature is greater than threshold.
Action Taken When the DTC Sets
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C0274 54 or C0275 54
•
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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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•
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The ABS indicator turns ON.
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•
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The traction control/stability control-active indicator turns ON.
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C0280 54
•
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The EBCM disables the stability control and hill start assist for the duration of the ignition cycle.
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•
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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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The condition for setting the DTC is no longer present.
DTCs can set because of extended operation of ABS, traction control or stability control.
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
ABS Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References
for scan tool information
Circuit/System Verification
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Ignition ON, observe the scan tool Inlet, Outlet, Isolation, and Prime Solenoid Valve Feedback parameters. The readings should be Inactive.
1.
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Ignition ON, verify that DTC C0187, C0196, C019B, or C0710 is not set as a present DTC.
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3.
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Ignition OFF, allow the hydraulic modulator valve assembly to cool down to ambient temperature.
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4.
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Ignition ON, verify that DTC C0274 54, C0275 54, or C0280 54 is not set as a present DTC.
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5.
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If any listed DTC is present, replace the K17 Electronic Brake Control Module and verify DTC does not reset. If the DTC resets replace the Q5 brake pressure modulator valve assembly.
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Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.