For 1990-2009 cars
ABS Components
Antilock Brake System Schematics

### Circuit Description

The pump motor relay is part of the Electronic Brake Control Module (EBCM). The EBCM turns ON and OFF the pump motor relay in order to activate the pump motor.

### Conditions for Setting the DTC

The EBCM detects a stuck pump motor during initialization.

### Action Taken When the DTC Sets

• | A malfunction DTC stores.

• | The ABS disables.

• | The ABS warning indicator turns ON.

### Conditions for Clearing the DTC

The condition responsible for setting the DTC no longer exists and the Scan Tool Clear DTCs function is used. If the pump motor monitor signal is still incorrect, DTC C0110 will set again as a current DTC and the ABS indicator remain ON.

### Diagnostic Aids

If DTC C0114 (Pump Motor Circuit Open) is set (Current or History) go to the DTC C0114 table first.

### Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

1. The Diagnostic System Check must be the starting point for any ABS related diagnosis.

2. If a pump motor circuit malfunction exists this DTC may set. Therefore the DTC C0114 must be diagnosed first.

3. If the condition for the malfunction is currently present the Electronic Brake Control Module (EBCM) is faulty.

4. Test the pump motor by turning it on an off through a scan tool. The scan tool will display if the EBCM commands the pump motor ON and feedback status.

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Was the Diagnostic System Check performed? | -- | Go to Step 2 | Go to Diagnostic System Check
2 | Is DTC C0114 set as a history DTC? | -- | Go to DTC C0114 Pump Motor Circuit Open | Go to Step 3
3 |

1. Disconnect the scan tool from the DLC (if connected).
2. Test drive the vehicle at 16 km/h (10 mph) for at least 20 seconds.

Is the ABS indicator ON?

--

Go to Step 4

Go to Step 5

4 |

1. Connect a scan tool to the Data Link Connector (DLC).
2. Select Diagnostic Trouble Codes (DTCs) on the scan tool.
3. Select Current DTC on the Scan Tool.

Is DTC C0110 set as a current DTC?

--

Go to Step 8

Go to Diagnostic System Check

5 |

1. Connect a scan tool to the Data Link Connector (DLC).
2. Turn the ignition switch to the ON position.
3. Select Diagnostic Trouble Codes (DTCs) on the scan tool.
4. Select Clear DTC Information on the scan tool.
5. Select Special Functions from the Application Menu on the scan tool.
6. Select Device Control on the scan tool.
7. Command the pump motor ON.

Did the pump motor turn ON and monitor ON during this test?

--

Go to Step 6

Go to Step 8

6 | Is the ABS indicator ON? | -- | Go to Step 7 | Go to Step 9
7 | Is DTC C0110 set as a current DTC? | -- | Go to Step 8 | Go to Diagnostic System Check
8 | Replace the Brake Pressure Modulator Valve (BPMV) assembly. Refer to Brake Pressure Modulator Valve Assembly Replacement . Is the repair complete? | -- | Go to Diagnostic System Check | --
9 | A malfunction is not present at this time. Refer to Diagnostic Aids for additional information regarding this DTC. Is the action complete? | -- | Go to Diagnostic System Check | --