Operation CHARM: Car repair manuals for everyone.
Home >> Ford >> 2012 >> Escape 4WD L4-2.5L Hybrid >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> C Code Charts >> C003A >> C003A:2F

C003A:2F




Anti-Lock Control - Hybrid

Pinpoint Test O: DTC C0030:07; C0031:29, 2F, 64; C0033:07; C0034:29, 2F, 64; C0036:07: C0037:29, 2F, 64; C0039:07; C003A:29, 2F or C003A:64

Refer to Wiring Diagram Set 42, Vehicle Dynamic Systems for schematic and connector information Electrical Diagrams.

Normal Operation

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





This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Tire size

- Tire pressure

- Wheel speed sensor

- Wheel speed sensor ring

- Wheel bearing

- ABS module

PINPOINT TEST O : DTC C0030:07; C0031:29, 2F, 64; C0033:07; C0034:29, 2F, 64; C0036:07: C0037:29, 2F, 64; C0039:07; C003A:29, 2F OR C003A:64

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

O1 VERIFY ALL WIRING CONNECTIONS

- Ignition OFF.

- Disconnect: ABS Module C155.

- Disconnect: Suspect Wheel Speed Sensor.

- Using a good light source, inspect each connector terminal for any corrosion.

- Inspect both connectors for any pushed-out pins.
Refer to Wiring Diagram Set 5 for schematic and connector information Electrical Diagrams.

- Using a suitable mating terminal, check each female terminal for deformed or enlarged contacts by comparing the mating terminal's fit between each of the following pins:
- C155-33
- C155-34
- C155-36
- C155-37
- C155-42
- C155-43
- C155-45
- C155-46
- Suspect wheel speed sensor, pin-1
- Suspect wheel speed sensor, pin-2






- Refer to Wiring Diagram Set 5 for schematic and connector information Electrical Diagrams.

Is each terminal free of corrosion, pushed-out pins or spread terminals?

Yes
GO to O2.

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

O2 CHECK THE DTCs FROM THE SELF-TEST

- Connect: ABS Module C155.

- Connect: Suspect Wheel Speed Sensor.

- Review the DTCs retrieved and recorded during Inspection and Verification.

Are DTCs C0031:01; C0034:01; C0037:01 and/or C003A:01 present?

Yes
GO to Pinpoint Test N Pinpoint Test N: DTC C0031:01; C0034:01; C0037:01 Or C003A:01.

No
If DTCs C0030:07; C0033:07; C0036:07, and/or C0039:07 are present, GO to O5.
If DTCs C0031:2F; C0034:2F; C0037:2F, and/or C003A:2F are present, GO to O4.
If DTCs C0031:29, 64; C0034:29, 64; C0037:29, 64; C003A:29 and/or C003A:64 are present, GO to O3.
For all other DTCs, REFER to the ABS Module DTC Chart Anti-Lock Control.

O3 CHECK THE TIRES SIZE AND PRESSURE

- Verify that all tires and wheels are the same size and that the inflation pressures are correct as indicated on the Vehicle Certification (VC) label.

Are the wheels and tires OK?

Yes
GO to O4.

No
INSTALL the correct size tire or adjust tire pressure as necessary.

O4 MONITOR THE WHEEL SPEED SENSOR PIDs

- Connect the scan tool.

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: DataLogger- ABS Module.

- Drive the vehicle at a constant speed and monitor the following wheel speed sensor PIDs:
- 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 PIDs consistent with the vehicle speed and each other?

Yes
CLEAR the DTCs. DRIVE the vehicle. RETRIEVE the DTCs. If DTCs C0031:29, 2F, 64; C0034:29, 2F, 64; C0037:29, 2F, 64; C003A:29, 2F and/or C003A:64 are present, GO to O14.

No
GO to O5.

O5 INSPECT THE WHEEL SPEED SENSOR MOUNTING

- Ignition OFF.

- With the vehicle in NEUTRAL, position it on a hoist.
- Inspect the wheel speed sensor and fastener for looseness.

Are the wheel speed sensor and fastener tight?

Yes
GO to O7.

No
TIGHTEN the wheel speed sensor to specification. REFER to Specifications. CLEAR the DTCs. GO to O6.

O6 RECHECK THE WHEEL SPEED PIDs

- Connect the scan tool.

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: DataLogger- ABS Module.

- Drive the vehicle at a constant speed and monitor the following wheel speed sensor PIDs:
- 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 PIDs consistent with the vehicle speed and each other?

Yes
The system is operating correctly at this time. The concern may have been caused by a loose wheel speed sensor.

No
GO to O7.

O7 CHECK THE WHEEL SPEED SENSOR FOR DAMAGE

- Ignition OFF.

- With the vehicle in NEUTRAL, position it on a hoist.

- 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 wheel speed sensor and harness for abrasion, broken connector tabs or water intrusion.


Is the wheel speed sensor and harness OK?

Yes
GO to O8.

No
INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor - Front or Wheel Speed Sensor - Rear . CLEAR the DTCs. REPEAT the self-test.

O8 CHECK FOR WHEEL SPEED SENSOR RING DAMAGE

- Inspect the 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 OK?

Yes
GO to O9.

No
INSTALL a new wheel speed sensor ring. REFER to Wheel Speed Sensor Ring - Front or Wheel Speed Sensor Ring - Rear . CLEAR the DTCs. REPEAT the self-test.

O9 CHECK FOR BEARING DAMAGE

- Inspect the wheel bearings for damage.

Are the wheel bearings OK?

Yes
If the Active Wheel Speed Sensor Tester is available, GO to O10.

If the Active Wheel Speed Sensor Tester is not available, GO to O12.

No
INSTALL new wheel bearings as necessary. CLEAR the DTCs. REPEAT the self-test.

O10 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.
- Ignition ON.
- Select the correct system polarity on the tester and turn the tester power switch to the ON position.

Is the module output LED illuminated?

Yes
GO to O11.

No
GO to O14.

O11 CHECK THE WHEEL SPEED SENSOR OUTPUT WITH THE ACTIVE WHEEL SPEED SENSOR TESTER

- Raise the suspect wheel until it can spin freely.

- 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
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.

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. For the front wheel speed sensor, REFER to Wheel Speed Sensor - Front . For the rear wheel speed sensor, REFER to 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 speed sensor tone ring and INSTALL new if necessary. For the front wheel speed sensor tone ring, REFER to Wheel Speed Sensor Ring - Front . For the rear wheel speed sensor tone ring, REFER to Wheel Speed Sensor Ring - Rear . If the tone ring is OK, INSTALL a new wheel speed sensor. For the front wheel speed sensor, REFER to Wheel Speed Sensor - Front . For the rear wheel speed sensor, REFER to Wheel Speed Sensor - Rear . CLEAR the DTCs. REPEAT the self-test.

O12 CHECK THE ABS MODULE OUTPUT

- Ignition OFF.

- Disconnect: Suspect Wheel Speed Sensor.

- Ignition ON.

- Measure the voltage between the suspect wheel speed sensor pins, harness side.





Is the voltage greater than 10 volts?

Yes
GO to O13.

No
GO to O14.

O13 CHECK THE WHEEL SPEED SENSOR OUTPUT

- Disconnect: Suspect Wheel Speed Sensor.

- For LF wheel speed sensor DTCs, connect the meter between LF wheel speed sensor C150-1, circuit RCA17 (YE), harness side and LF wheel speed sensor pin 1, component side. Connect a fused jumper wire between LF wheel speed sensor C150-2, circuit VCA03 (VT/WH), harness side and LF wheel speed sensor pin 2, component side.





- For RF wheel speed sensor DTCs, connect the meter between RF wheel speed sensor C160-1, circuit RCA19 (VT), harness side and RF wheel speed sensor pin 1, component side. Connect a fused jumper wire between RF wheel speed sensor C160-2, circuit VCA05 (GY/VT), harness side and RF wheel speed sensor pin 2, component side.

- For RR wheel speed sensor DTCs, connect the meter between RR wheel speed sensor C426-2, circuit RCA20 (BN), harness side and RR wheel speed sensor pin 2, component side. Connect a fused jumper wire between RR wheel speed sensor C426-1, circuit VCA06 (WH/OG), harness side and RR wheel speed sensor pin 1, component side.

- For LR wheel speed sensor DTCs, connect the meter between LR wheel speed sensor C440-2, circuit RCA18 (BN/GN), harness side and LR wheel speed sensor pin 2, component side. Connect a fused jumper wire between LR wheel speed sensor C440-1, circuit VCA04 (BU/OG), harness side and LR wheel speed sensor pin 1, component side.

- Ignition ON.

- Measure the current while slightly rotating the wheel, using incremental turns.

Does the automotive meter switch between the low state (5 to 8 mA) and the high state (12 to 16 mA)?

Yes
GO to O14.

No
INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor - Front or Wheel Speed Sensor - Rear . CLEAR the DTCs. REPEAT the self-test.

O14 CHECK FOR CORRECT ABS MODULE OPERATION

- Ignition OFF.

- Disconnect: ABS Module C155.

- Check for:
- corrosion.
- pushed-out pins.
- spread terminals.


- Connect: ABS Module C155.

- Make sure the connector is seated correctly, then 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 . TEST the system for normal operation.

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.

pro multis · About Operation CHARM