C0137

DTC C0137

Circuit Description

The electronic brake control module (EBCM) uses the input from the brake fluid pressure sensor for more accurate braking control during Vehicle Stability Enhancement System (VSES).

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC C0137 Base Brake System Pressure Circuit Range





Conditions for Running the DTC

* The ignition is ON.
* Ignition voltage is greater than 8 volts.

Conditions for Setting the DTC

The brake fluid pressure is less than 345 kPa (50 psi) for 3 deceleration cycles.

Action Taken When the DTC Sets

* The EBCM disables the VSES for the duration of the ignition cycle.
* The Traction Control and Active Handling indicator turns ON.
* The driver information center (DIC) displays the Service Active Handling message.
* The Antilock Brake System (ABS) remains functional.

Conditions for Clearing the DTC

* The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
* The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Diagnostic Aids

* Find out from the driver under what conditions the DTC was set (when the DIC displayed the Service Active Handling message). This information will help to duplicate the failure.
* The Snapshot function on the scan tool can help find an intermittent DTC.
* A deceleration cycle consists of the following sequence:

1. The vehicle speed is greater than 24 km/h (15 mph).
2. The vehicle decelerates more than 8 km/h/second (5 mph/second) for 2 seconds.
3. The vehicle speed decelerates to less than 16 km/h (10 mph).

Test Description

The numbers below refer to the step numbers on the diagnostic table.
3. Tests for the proper operation of the circuit in the low voltage range.
4. Tests for the proper operation of the circuit in the high voltage range. If the fuse in the jumper opens when you perform this test, the signal circuit is shorted to ground.
5. Tests for a short to voltage in the 5-volt reference circuit.
6. Tests for a high resistance or an open in the low reference circuit.

Step 1 - Step 8:

Step 9 - Step 16: