Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMERCURY2009MILAN PREMIER, 3.0 1, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 629 (VEHICLE DYNAMIC SYSTEMS)DIAGNOSIS AND TESTINGANTI-LOCK CONTROLINSPECTION AND VERIFICATION
2009 Mercury Milan Premier, 3.0 1, AWD
Inspection and Verification
2009 Mercury Milan Premier, 3.0 1, AWDSECTION Inspection and Verification
WARNING: This page is about a different car, the 2006 Mercury Milan, 2006 Lincoln Zephyr, and 2006 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
- Verify the customer concern.
- Verify the stoplamps operate correctly by pressing and releasing the brake pedal with the ignition switch in the ON position. If the stoplamps do not operate correctly, refer to EXTERIOR LIGHTING . If the stoplamps operate correctly, proceed to the next step.
- Visually inspect for obvious signs of mechanical or electrical damage.VISUAL INSPECTION CHART
Mechanical Electrical - Incorrectly inflated tires
- Mismatched wheels or tires on vehicle
- Base brake system
- Wheel speed sensor
- Wheel speed sensor tone ring
- Hydraulic control unit (HCU)
- Battery junction box (BJB) fuse(s):
- 10 (20A)
- 36 (40A)
- 44 (15A)
- Smart junction box (SJB) fuse:
- 28 (10A)
- Circuitry
- Stoplamp switch
- Traction control switch
- Wheel speed sensors
- Anti-lock brake system (ABS) module
- If the cause is not visually evident, connect the scan tool to the data link connector (DLC) and select the vehicle to be tested from the scan tool menu. If the scan tool does not communicate with the vehicle:
- Check that the program card is correctly installed.
- Check the connections to the vehicle.
- Check the ignition switch position.
- If the scan tool still does not communicate with the vehicle, refer to the scan tool operating manual.
- Carry out the scan tool data link test. If the scan tool responds with:
- CAN or ISO circuit fault; all electronic control units no response/not equipped, refer to MODULE COMMUNICATIONS NETWORK .
- No response/not equipped for the ABS module, GO to PINPOINT TEST A .
- System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs, and carry out self-test diagnostics for the ABS module.
- If the DTCs retrieved are related to the concern, go to the ANTI-LOCK BRAKE SYSTEM (ABS) MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX .
- If no DTCs related to the concern are retrieved, GO to SYMPTOM CHART .
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE DIAGNOSTIC TROUBLE CODE (DTC) CHART
| DTCs | Description | Source | Action |
|---|---|---|---|
| B1342 | ECU is Faulted | ABS | CLEAR the DTCs. RETRIEVE the DTCs. REPEAT the self-test. If other DTCs are retrieved, ADDRESS those DTCs before addressing DTC B1342. If only DTC B1342 is retrieved, INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE . REPEAT the self-test. |
| B1483 | Brake Pedal Input Open Circuit | ABS | GO to PINPOINT TEST B . |
| B1676 | Battery Pack Voltage Out of Range | ABS | GO to PINPOINT TEST C . |
| C1095 | ABS Hydraulic Pump Motor Circuit Failure | ABS | GO to PINPOINT TEST F . |
| C1145 | Speed Wheel Sensor RF Input Circuit Failure | ABS | GO to PINPOINT TEST D . |
| C1155 | Speed Wheel Sensor LF Input Circuit Failure | ABS | GO to PINPOINT TEST D . |
| C1165 | Speed Wheel Sensor RR Input Circuit Failure | ABS | GO to PINPOINT TEST D . |
| C1175 | Speed Wheel Sensor LR Input Circuit Failure | ABS | GO to PINPOINT TEST D . |
| C1233 | Wheel Speed LF Signal Fault | ABS | GO to PINPOINT TEST E . |
| C1234 | Wheel Speed RF Signal Fault | ABS | GO to PINPOINT TEST E . |
| C1235 | Wheel Speed RR Signal Fault | ABS | GO to PINPOINT TEST E . |
| C1236 | Wheel Speed LR Signal Fault | ABS | GO to PINPOINT TEST E . |
| U1900 | CAN communication Bus Fault - Receive Error | ABS | REFER to MODULE COMMUNICATIONS NETWORK . |
For a complete master list of ABS DTCs, refer to MULTIFUNCTION ELECTRONIC CONTROL MODULES .
INSTRUMENT CLUSTER DIAGNOSTIC TROUBLE CODE (DTC) CHART
| DTC | Description | Source | Action |
|---|---|---|---|
| C1093 | Traction Control Disable Switch Circuit Failure | Instrument cluster | GO to PINPOINT TEST J . |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.