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Home >> Ford >> 2006 >> Focus L4-2.3L VIN Z >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Information Bus >> Testing and Inspection >> Pinpoint Tests >> Test A: The Anti-Lock Brake System (ABS) Module Does Not Respond to the Diagnostic Tool
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Test A: The Anti-Lock Brake System (ABS) Module Does Not Respond to the Diagnostic Tool

PINPOINT TEST A: THE ANTI-LOCK BRAKE SYSTEM (ABS) MODULE DOES NOT RESPOND TO THE DIAGNOSTIC TOOL


A1:






A1-A2:






Normal Operation
The ABS module communicates with the diagnostic tool through the controller area network (CAN), circuits 4-EC9A (GY) and 5-EC9A (BU). The CAN also connects (through an in-line) to 4-EC7E (GY/RD) and 5-EC7E (BU/RD). Check the CAN circuits between the ABS module C135 (with stability assist) or C155 (ABS only) and the data link connector (DLC) C251. The total resistance values must not be more than 5 ohms. If the resistance is more than 5 ohms there is an open in one of the CAN circuits, damage to the DLC C251, damage to the ABS module connector, or a problem in an in-line connector.

Possible Causes
- CAN circuit 4-EC7E (GY/RD) open
- CAN circuit 4-EC9A (GY) open
- CAN circuit 5-EC7E (BU/RD) open
- CAN circuit 5-EC9A (BU) open
- ABS module C135 (with stability assist)
- ABS module C155 (ABS only)
- ABS module
- DLC C251
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