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Home >> Ford >> 2010 >> Fusion AWD V6-3.0L >> Repair and Diagnosis >> Brakes and Traction Control >> Antilock Brakes / Traction Control Systems >> Testing and Inspection >> Pinpoint Tests >> Pinpoint Test D: DTCs C1233, C1234, C1235 and C1236

Pinpoint Test D: DTCs C1233, C1234, C1235 and C1236




Anti-Lock Control - Non-Hybrid

Pinpoint Tests

Pinpoint Test D: DTCs C1233, C1234, C1235 and C1236

Refer to Wiring Diagram Set 42 (Fusion/Milan/MKZ, Fusion Hybrid/Milan Hybrid), Vehicle Dynamic Systems for schematic and connector information. Diagrams By Number

Normal Operation

The wheel speed sensor and sensor ring generate a square wave signal to the ABS module that is proportional to the wheel speed. The ABS module compares the wheel speed inputs from all the wheel speed sensors to determine an impending wheel lockup.

C1233-C1236:





This pinpoint test is intended to diagnose the following:
- Mismatched tire sizes
- Wheel speed sensor ring (part of the wheel bearing and hub assembly)
- Wheel speed sensor
- ABS module



PINPOINT TEST D: DTCs C1233, C1234, C1235 AND C1236

NOTICE: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.

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D1 CHECK THE DTCs FROM THE SELF-TEST


- Review the DTCs recorded during Inspection and Verification.
- Are DTCs C1145, C1155, C1165 or C1175 present?

Yes
GO to Pinpoint Test C. Pinpoint Test C: DTCs C1145, C1155, C1165 and C1175

No
GO to D2.

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D2 CHECK THE TIRES SIZE AND PRESSURE


- Verify that the tires are the correct size for the vehicle as indicated on the Vehicle Certification (VC) label.
- Verify that the air pressure in all the tires is correct as indicated on the VC label.
- Are the wheels and tires OK?

Yes
GO to D3.

No
INSTALL the correct tires or ADJUST tire pressure as necessary. CLEAR the DTCs. TEST the system for normal operation.

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D3 INSPECT THE WHEEL SPEED SENSOR MOUNTING


- Ignition ON.
- With the vehicle in NEUTRAL, position it on a hoist. Refer to Vehicle Jacking and Lifting.
- Inspect the suspect wheel speed sensor for looseness.
- Is the wheel speed sensor loose?

Yes
TIGHTEN the wheel speed sensor to specification. REFER to Specifications. CLEAR the DTCs. GO to D4.

No
GO to D5.

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D4 RECHECK THE WHEEL SPEED PIDs


- Connect the scan tool.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: DataLogger - ABS Module.
- Monitor the following PIDs while driving the vehicle at a constant speed:
- Left Front Wheel Speed Sensor (LF_WSPD)
- Right Front Wheel Speed Sensor (RF_WSPD)
- Left Rear Wheel Speed Sensor (LR_WSPD)
- Right Rear Wheel Speed Sensor (RR_WSPD)
- Are all the wheel speed sensor PID values similar?

Yes
The vehicle is OK. The concern may have been caused by a loose wheel speed sensor.

No
GO to D5.

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D5 INSPECT THE WHEEL SPEED SENSOR FOR DAMAGE


- NOTE: Examine the wheel speed sensor wire carefully with a good light source. Failure to verify damage in the wheel speed sensor wire can lead to unnecessary installation of a new component.
- Inspect the suspect wheel speed sensor for general damage.
- Is the wheel speed sensor OK?

Yes
GO to D6.

No
INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor - Front Wheel Speed Sensor - Front, Wheel Speed Sensor - Rear, Front Wheel Drive (FWD) Wheel Speed Sensor - Rear or Wheel Speed Sensor - Rear, All Wheel Drive (AWD) Wheel Speed Sensor - Rear. CLEAR the DTCs. REPEAT the self-test.

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D6 INSPECT THE WHEEL SPEED SENSOR RING AND WHEEL BEARING FOR DAMAGE


- Inspect the wheel bearing for damage.
- Inspect the suspect wheel speed sensor ring for damaged or missing teeth. Rotate the wheel to verify that no teeth are missing.
- Is the wheel speed sensor ring and wheel bearing OK?

Yes
If the Active Wheel Speed Sensor Tester is available, GO to D7. If the Active Wheel Speed Sensor Tester is not available, GO to D9.

No
INSTALL a new front or rear wheel hub and bearing. REFER to Front Suspension &/or Steering Knuckle for front wheel hubs or Rear Suspension for rear wheel hubs. CLEAR the DTCs. REPEAT the self-test.

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D7 CHECK THE ABS MODULE OUTPUT USING THE ACTIVE WHEEL SPEED SENSOR TESTER


- Ignition OFF.
- Disconnect: Suspect Wheel Speed Sensor.
- Connect the Active Wheel Speed Sensor Tester to the wheel speed sensor connectors.
- Select the correct system polarity on the tester and turn the tester power switch to the ON position.
- Ignition ON.
- Is the module output LED illuminated?

Yes
GO to D8.

No
GO to D10.

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D8 CHECK THE WHEEL SPEED SENSOR OUTPUT WITH THE ACTIVE WHEEL SPEED SENSOR TESTER


- Raise the suspect wheel until it can spin freely. Refer to Vehicle Jacking and Lifting.
- While monitoring the Active Wheel Speed Sensor Tester, slowly spin the suspect wheel.
- Do the sensor output LEDs illuminate and flash and is the current overload LED not illuminated?

Yes
INSPECT the wheel speed sensor tone ring for damage and looseness. INSTALL new components as necessary. If the tone ring is OK, the concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.

No
If the current level LED is not illuminated and the sensor output LEDs do not illuminate or if the current level LED is illuminated red, INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor - Front Wheel Speed Sensor - Front, Wheel Speed Sensor - Rear, Front Wheel Drive (FWD) Wheel Speed Sensor - Rear or Wheel Speed Sensor - Rear, All Wheel Drive (AWD) Wheel Speed Sensor - Rear. CLEAR the DTCs. REPEAT the self-test.

If the current level LED is not illuminated and the sensor output LEDs illuminate green, but do not flash, INSPECT the wheel hub and bearing (tone ring is part of the wheel bearing). INSTALL new as necessary. If the wheel hub and bearing are OK, INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor - Front Wheel Speed Sensor - Front, Wheel Speed Sensor - Rear, Front Wheel Drive (FWD) Wheel Speed Sensor - Rear or Wheel Speed Sensor - Rear, All Wheel Drive (AWD) Wheel Speed Sensor - Rear. CLEAR the DTCs. REPEAT the self-test.

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D9 CHECK THE ABS MODULE OUTPUT


- Ignition OFF.
- Disconnect: Suspect Wheel Speed Sensor.
- Ignition ON.
- For DTC C1233, measure the voltage between:
- LF wheel speed sensor C150-1, circuit VCA03 (VT/WH), harness side and LF wheel speed sensor C150-2, circuit RCA17 (YE), harness side.




- For DTC C1234, measure the voltage between:
- RF wheel speed sensor C160-1, circuit VCA05 (GY/VT), harness side and RF wheel speed sensor C160-2, circuit RCA19 (VT), harness side.




- For DTC C1235, measure the voltage between:
- RR wheel speed sensor C426-3, circuit VCA06 (WH/OG), harness side and RR wheel speed sensor C426-1, circuit RCA20 (BN), harness side.




- For DTC C1236, measure the voltage between:
- LR wheel speed sensor C440-3, circuit VCA04 (BU/OG), harness side and LR wheel speed sensor C440-1, circuit RCA18 (BN/GN), harness side.




- Is the voltage greater than 10 volts?

Yes
INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor - Front Wheel Speed Sensor - Front, Wheel Speed Sensor - Rear, Front Wheel Drive (FWD) Wheel Speed Sensor - Rear or Wheel Speed Sensor - Rear, All Wheel Drive (AWD) Wheel Speed Sensor - Rear. CLEAR the DTCs. REPEAT the self-test.

No
GO to D10.

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D10 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR AN OPEN


NOTE: Both circuits must be checked for each DTC.

- Ignition OFF.
- Disconnect: Suspect Wheel Speed Sensor (if not previously disconnected).
- Disconnect: ABS Module C135.
- Measure the resistance between the ABS module connector, harness side and the suspect wheel speed sensor connector, harness side as indicated in the following chart:









- Are the resistances less than 5 ohms?

Yes
GO to D11.

No
REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.

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D11 CHECK FOR CORRECT ABS MODULE OPERATION


- Disconnect: ABS Module C135.
- Check for:
- corrosion.
- pushed-out pins.
- spread terminals.
- Connect the ABS module connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module Service and Repair. CLEAR the DTCs. REPEAT the self-test.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.

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