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Home › Chevrolet › 2007 › Corvette Base, 2D Convertible, Standard › Repair and Diagnosis › Brakes › Anti-Lock Brake System, Traction Control System & Stability Control System › Diagnostic Information and Procedures › DTC C0870 › Test Description

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. 5:  Tests for a short at the brake pressure sensor.
  2. 6:  Tests for a short at the steering wheel position sensor.
  3. 7:  Tests for a short at the yaw rate/lateral accelerometer sensor.
DTC C0870

Step Action Values Yes No
Schematic Reference: Antilock Brake System Schematics 
Connector End View Reference: Antilock Brake System Connector End Views 
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle
2 Test the 5-volt reference circuit from the electronic brake control module (EBCM) for the following conditions:
  • An open
  • A short to ground
  • A high resistance

Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 16  Go to Step 3 
3 Test the 5-volt reference circuit from the EBCM for a short to voltage. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 16  Go to Step 4 
4
  1. Turn OFF the ignition.
  2. Disconnect the EBCM.
  3. Install the J 39700  Universal Pinout Box with the J 39700-530  Cable Adapter between the EBCM and the EBCM harness connector. See Special Tools .
  4. Turn ON the ignition, with the engine OFF.
  5. Using the DMM, measure the voltage between the 5-volt reference circuit and ground.
Is the voltage within the specified value?		 4.8-5.2 V Go to Diagnostic Aids Go to Step 5 
5 
  1. Turn OFF the ignition.
  2. Disconnect the brake pressure sensor.
  3. Turn ON the ignition, with the engine OFF.
  4. Using the DMM, measure the voltage between the 5-volt reference circuit and ground.
Is the voltage within the specified value?		 4.8-5.2 V Go to Step 8  Go to Step 6 
6 
  1. Turn OFF the ignition.
  2. Disconnect the steering wheel position sensor connector
  3. Turn the ignition ON, with the engine OFF.
  4. Using the DMM, measure the voltage between the 5-volt reference circuit and ground.
Is the voltage within the specified value?		 4.8-5.2 V Go to Step 9  Go to Step 7 
7 
  1. Turn OFF the ignition.
  2. Disconnect the yaw rate/lateral accelerometer sensor connector
  3. Turn the ignition ON, with the engine OFF.
  4. Using the DMM, measure the voltage between the 5-volt reference circuit and ground.
Is the voltage within the specified value?		 4.8-5.2 V Go to Step 10  Go to Step 11 
8 Inspect for poor connections at the harness connector of the brake pressure sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 - Go to Step 16  Go to Step 12 
9 Inspect for poor connections at the harness connector of the steering wheel position sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 - Go to Step 16  Go to Step 13 
10 Inspect for poor connections at the harness connector of the yaw rate/lateral accelerometer sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 - Go to Step 16  Go to Step 14 
11 Inspect for poor connections at the harness connector of the EBCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 - Go to Step 16  Go to Step 15 
12 Replace the brake pressure sensor. Refer to Brake Fluid Pressure Sensor Replacement .
Did you complete the repair?		 - Go to Step 16  -
13 Replace the steering wheel position sensor. Refer to Steering Wheel Position Sensor Replacement .
Did you complete the repair?		 - Go to Step 16  -
14 Replace the yaw rate/lateral accelerometer sensor. Refer to Yaw Rate Sensor/Lateral Accelerometer Replacement .
Did you complete the repair?		 - Go to Step 16  -
15 Replace the EBCM. Refer to Control Module References for replacement, setup, and programming.
Did you complete the repair?		 - Go to Step 16  -
16
  1. Clear the DTCs using the scan tool.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC reset?		 - Go to Step 2  System OK
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