PINPOINT TEST H: DTCs C1145, C1155, C1165 AND C1175 - WHEEL SPEED SENSOR INPUT CIRCUIT FAILURE

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

H1 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO POWER

CAUTION: No measurements should be taken with the wheel speed sensor connected. Damage to the wheel speed sensor will result.

NOTE: Both circuits must be checked for each DTC.

Key in OFF position.
Disconnect: ABS Module C1462.
Disconnect: Suspect Wheel Speed Sensor.
Key in ON position.

Measure the voltage between the ABS module C1462, harness side and ground as follows:

DTC	ABS Module Connector Pin	Circuit
C1145	C1462-33	516 (YE/BK)
C1145	C1462-34	514 (YE/RD)
C1155	C1462-45	521 (TN/OG)
C1155	C1462-46	522 (TN/BK)
C1165	C1462-42	524 (PK/BK)
C1165	C1462-43	523 (RD/PK)
C1175	C1462-36	518 (LG/RD)
C1175	C1462-37	519 (LG/BK)

Is any voltage present?

Yes : REPAIR the circuit(s) in question. CLEAR the DTC(s). REPEAT the self-test.
No : GO to H2.

H2 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO GROUND

NOTE: Both circuits must be checked for each DTC.

Key in OFF position.

Measure the resistance between the ABS module C1462, harness side and ground as follows:

DTC	ABS Module Connector Pin	Circuit
C1145	C1462-33	516 (YE/BK)
C1145	C1462-34	514 (YE/RD)
C1155	C1462-45	521 (TN/OG)
C1155	C1462-46	522 (TN/BK)
C1165	C1462-42	524 (PK/BK)
C1165	C1462-43	523 (RD/PK)
C1175	C1462-36	518 (LG/RD)
C1175	C1462-37	519 (LG/BK)

Are the resistances greater than 10,000 ohms?

Yes : GO to H3.
No : REPAIR the circuit(s) in question. CLEAR the DTC(s). REPEAT the self-test.

H3 CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR AN OPEN

NOTE: Both circuits must be checked for each DTC.

Disconnect: Suspect Wheel Speed Sensor.

Measure the resistance between the ABS module C1462, harness side and the suspect wheel speed sensor connector, harness side as follows:

DTC	Circuit	ABS Module Connector Pin	Wheel Speed Sensor Connector Pin
C1145	516 (YE/BK)	C1462-33	RH front wheel speed sensor C160-1
C1145	514 (YE/RD)	C1462-34	RH front wheel speed sensor C160-2
C1155	521 (TN/OG)	C1462-45	LH front wheel speed sensor C150-2
C1155	522 (TN/BK)	C1462-46	LH front wheel speed sensor C150-1
C1165	523 (RD/PK)	C1462-43	RH rear wheel speed sensor C426-1
C1165	524 (PK/BK)	C1462-42	RH rear wheel speed sensor C426-2
C1175	518 (LG/RD)	C1462-36	LH rear wheel speed sensor C440-1
C1175	519 (LG/BK)	C1462-37	LH rear wheel speed sensor C440-2

Are the resistances less than 5 ohms?

Yes : GO to H4.
No : REPAIR the circuit(s) in question. CLEAR the DTC(s). REPEAT the self-test.

H4 CHECK FOR SHORTED WHEEL SPEED SENSOR CIRCUITS
- Measure the resistance between the suspect wheel speed sensor pins, harness side.
  
  Fig 1: Measuring Resistance Between Suspect Wheel Speed Sensor Pins, Harness Side
  Courtesy of FORD MOTOR CO.
- Is the resistance greater 10,000 ohms?
- Yes : GO to H5.
- No : REPAIR the circuit(s) in question. CLEAR the DTC(s). REPEAT the self-test.
H5 CHECK THE ABS MODULE OUTPUT
- Connect: ABS Module C1462.
- Key in ON position.
- Measure the voltage between the suspect wheel speed sensor pins, harness side.
  
  Fig 2: Measuring Voltage Between Suspect Wheel Speed Sensor Pins, Harness Side
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : INSTALL a new wheel speed sensor. REFER to WHEEL SPEED SENSOR - FRONT or WHEEL SPEED SENSOR - REAR . CLEAR the DTC(s). REPEAT the self-test.
- No : GO to H6.
H6 CHECK FOR CORRECT ABS MODULE OPERATION
- Disconnect the ABS module connector.
- Check for:
  - corrosion.
  - pushed-out pins.
- Connect the ABS module connector and make sure it is seated correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes : INSTALL a new HCU. REFER to HYDRAULIC CONTROL UNIT (HCU) - HYBRID . 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 DTC(s). REPEAT the self-test.