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Home >> Pontiac >> 2005 >> Aztek Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 91 (Antilock Brake System, Traction Control System & Stability Control System) >> Diagnostic Information and Procedures >> DTC C0131 >> Test Description

Test Description

WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.

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

  1. 2:  Tests for specified voltage on the brake pressure signal circuit.
  2. 3:  Checks to see if voltage was below specified voltage.
  3. 4:  Checks to see if voltage was below specified voltage.
  4. 5:  Checks to see if voltage was above specified voltage of 5 volt reference.
  5. 6:  Tests for a short to ground in the 5 volt reference circuit.
  6. 7:  Tests for a short to voltage in the 5 volt reference circuit.
  7. 8:  Tests for a short to ground, a high resistance, or an open in the 5 volt reference circuit.
  8. 9:  Tests for a short to voltage, a high resistance, or an open in the brake pressure sensor signal circuit.
  9. 10:  Tests for a high resistance or an open in the ground circuit of the brake pressure sensor.
  10. 11:  Checks the brake pressure sensor connector for poor connections.
  11. 12:  Checks the EBCM connector for poor connections.
DTC C0131

Step Action Value(s) Yes No
Schematic Reference:  ABS Schematics  
Connector End View Reference: ABS Connector End Views 
1 Did you perform the ABS Diagnostic System Check? - Go to Step 2  Go to Diagnostic System Check - ABS 
2 
  1. Turn OFF the ignition.
  2. Disconnect the EBCM.
  3. Install the J 39700  Universal Pinout Box with the. See Special Tools and Equipment . J 39700-530 Cable Adapter between the EBCM and the EBCM harness connector.
  4. Turn ON the ignition, with the engine OFF.
  5. Using the DMM, measure the voltage between pin 17 and pin 15 of the J 39700  . See Special Tools and Equipment .
Is the voltage within the specified value?		 0.25-4.75 V Go to Diagnostic Aids Go to Step 3 
3 
  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 pin 17 and pin 15 of the J 39700  . See Special Tools and Equipment .
Is the voltage greater than the specified value?		 5 V Go to Step 4  Go to Step 8 
4 
  1. Turn OFF the ignition.
  2. Connect a 3 amp fused jumper wire between the signal circuit of the brake pressure sensor and the ground circuit of the brake pressure sensor.
  3. Turn ON the ignition, with the engine OFF.
  4. Using the DMM, measure the voltage between pin 17 and pin 15 of the J 39700  . See Special Tools and Equipment .
Is the voltage less than the specified value?		 0.25 V Go to Step 5  Go to Step 9 
5 
  1. Turn OFF the ignition.
  2. Disconnect the fused jumper wire.
  3. Connect a 3 amp fused jumper wire between the 5 volt reference circuit of the brake pressure sensor and the signal circuit of the brake pressure sensor.
  4. Measure the voltage between the 5 volt reference circuit of the brake pressure sensor and the signal circuit of the brake pressure sensor.
Is the voltage measured greater than the specified value?		 5 V Go to Step 7  Go to Step 6 
6  Test the 5 volt reference circuit of the brake pressure sensor for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 15  Go to Step 12 
7  Test the 5 volt reference circuit of the brake pressure sensor for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 15  Go to Step 11 
8  Test the signal circuit of the brake pressure sensor for a short to ground, a high resistance, or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 15  Go to Step 12 
9  Test the signal circuit of the brake pressure sensor for a short to voltage, a high resistance, or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 15  Go to Step 10 
10  Test the ground circuit of the brake pressure sensor for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 15  Go to Step 12 
11  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 in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 15  Go to Step 13 
12  Inspect for poor connections at the harness connector of the EBCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 15  Go to Step 14 
13 Replace the brake pressure sensor. Refer to Brake Fluid Pressure Sensor Replacement .
Did you complete the replacement?		 - Go to Step 15  -
14 Replace the EBCM. Refer to Electronic Brake Control Module Replacement .
Did you complete the replacement?		 - Go to Step 15  -
15
  1. Use the scan tool in order to clear the DTCs.
  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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