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Action Taken When the DTC Sets
• The EBCM disables the ABS for the duration of the
ignition cycle.
• The ABS indicator turns ON.
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
The pump motor is integral to the BPMV. The pump
motor is not serviceable. Inspect the power and ground
circuits proper connections.
Reference Information
Schematic Reference
"Antilock Brake System Schematics"
Connector End View Reference
"Antilock Brake System Connector End Views"
Description and Operation Reference
"ABS Description and Operation"
Electrical Information Reference
• "Circuit Testing: "
• "Connector Repairs: "
• "Testing for Intermittent Conditions and Poor
Connections: "
• "Wiring Repairs: "
Scan Tool Reference
"Scan Tool Data List - Antilock Brake System" for EBCM
Circuit/System Verification
With scan tool installed, clear the DTCs then drive the
vehicle in a straight line at a speed greater than 20 km/h
(13 mph). If the DTC did not set as a current DTC see
diagnostic aids.
Circuit/System Testing
1. With the ignition OFF, disconnect the EBCM harness
connector and connect a test lamp between the
battery positive voltage circuit terminal going to the
ABS pump motor and to ground. It is important that
the test lamp is connected before the ignition is
turned ON.
2. With the ignition ON, verify that the test lamp
illuminates.
➢ If the test lamp does not illuminate, repair the open
or high resistance in the battery positive voltage
circuit.
3. Connect a test lamp between the battery positive
voltage circuit and pump motor ground circuit at the
EBCM connector, verify that the test lamp
illuminates.
➢ If the test lamp does not illuminate, repair the open
or high resistance in the pump motor ground circuit.
4. With ignition OFF, separate the EBCM from the
BPMV
5. Inspect the EBCM to BPMV connector for conditions
such as damage, corrosion, or presence of brake
fluid.
➢ If connector corrosion or damage is evident,
replace BPMV and/or EBCM as necessary.
➢ If brake fluid is present, replace both BPMV and
EBCM.
6. Connect the EBCM harness to the EBCM with the
BPMV still separated.
7. Connect a test lamp between the pump motor
circuits, the internal EBCM connector.
8. With ignition ON, use the scan tool to perform the
Pump Motor Test.
➢ If test lamp illuminates replace the BPMV.
➢ If test lamp does not illuminate replace the EBCM
and BPMV.
Repair Instructions
Perform the "Diagnostic Repair Verification - Vehicle
Diagnostic Information: " after completing the diagnostic
procedure.
• "Electronic Brake Control Module Replacement"
• "Control Module References: " for EBCM
replacement, setup, and programming
Repair Verification
"Diagnostic Repair Verification - Vehicle Diagnostic
Information: "
ABS:
4E-23
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Table of Contents
Troubleshooting
