DTC C0161
DTC C0161 |
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 C0161 5A
Antilock Braking System Brake Switch Circuit Not Plausible
DTC C0161 71
Antilock Braking System Brake Switch Circuit Invalid Data
Diagnostic Fault Information |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
5V Reference
|
C0277 06
|
C0277 06
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C0277 07
|
-
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Signal
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C0277 06
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C0277 06
|
C0277 07
|
C0277 09
|
Low Reference
|
-
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C0277 06
|
-
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-
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Circuit/System Description |
The body control module (BCM) monitors the brake pedal position sensor and sends a serial data message when the brake pedal is applied. When the vehicle is stopping, the electronic brake control module (EBCM) monitors for the brake pedal applied serial data message from the BCM, with the brake pressure increasing and the vehicle slowing down, or when the vehicle is accelerating, the brake pedal is not applied and brake pressure is not increasing.
Conditions for Running the DTC |
C0161 5A
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Ignition ON.
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DTC C0131 is not present.
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C0161 71
Ignition voltage is between 9-16 VConditions for Setting the DTC |
C0161 5A
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The EBCM detects brake pedal is not applied and the brake pressure is greater 15 bar (218 PSI) for 2 s.
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The EBCM detects the vehicle speed is greater than 16 km/h (10 MPH), the brake pedal is applied for 122 s, and brake pressure is less than 6.2 bar (90 PSI).
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C0161 71
The electronic suspension control module detects an invalid brake pedal applied signal.Action Taken When the DTC Sets |
The EBCM disables the hill start assist for the duration of the ignition cycle.
Conditions for Clearing the DTC |
A current DTC clears when the diagnostic runs and passes.
Diagnostic Aids |
The DTC C0161 can be set if the brake pedal is applied while accelerating or the brake pedal position sensor is out of adjustment.
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
Circuit/System Testing |
1. |
Ignition ON, verify that DTC C0277 is not present in the BCM.
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2. |
If DTC C0277 is present, refer to
DTC C0277 or C0890
.
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3. |
Ignition ON, observe the stop lamps while applying and releasing the brake pedal. Verify the stop lamps operate properly.
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4. |
If the stop lamps do not operate properly, refer to
Symptoms - Lighting
.
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5. |
Replace the module which sets the DTC and verify the DTC does not reset.
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6. |
If the DTC resets replace the K9 Body Control Module.
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Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for module replacement, setup and programming