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Anti-Lock Brake System (ABS) C155

Fig 1: Identifying Anti-Lock Brake System (ABS) C155
G03862100Courtesy of FORD MOTOR CO.
ANTI-LOCK BRAKE SYSTEM (ABS) C155 REFERENCE CHART

Pin Number(s) Circuit Designation/Description Normal Condition/Measurement
1 534 (YE/LG) hydraulic control unit (HCU) pump voltage B+ voltage at all times.
3 1572 (DG) steering wheel rotation sensor angle 1 0 volts. Greater than 10,000 ohms between the ABS module and ground. Less than 5 ohms between the ABS module and the steering wheel rotation sensor.
4 601 (LB/PK) ignition voltage Greater than 10 volts with the ignition switch in the ON position.
5 1577 (RD/LB) steering wheel rotation sensor ground 0 volts. Greater than 10,000 ohms between the ABS module and ground. Less than 5 ohms between the ABS module and the steering wheel rotation sensor, and less than 5 ohms between the ABS module yaw rate sensor.
6 1573 (YE) steering wheel rotation sensor angle 2 0 volts. Greater than 10,000 ohms between the ABS module and ground. Less than 5 ohms between the ABS module and the steering wheel rotation sensor.
7 1576 (TN/BK) steering wheel rotation sensor/accelerometer/yaw rate sensor voltage 0 volts. Greater than 10,000 ohms between the ABS module and ground. Less than 5 ohms between the ABS module and the steering wheel rotation sensor.
13 960 (BK/LB) stability assist OFF indicator Greater than 10 volts with the ignition switch in the ON position. Less than 5 ohms between the ABS module and the traction control switch.
16 274 (BK/WH) ABS module ground 0 volts, less than 5 ohms between the ABS module and ground.
17 1582 (LG/RD) active brake booster voltage 0 volts, less than 5 ohms between the ABS module and the active brake booster. Greater than 10,000 ohms between the ABS module and ground.
18 3601 (WH/RD) brake pressure transducer voltage 0 volts, less than 5 ohms between the ABS module and the brake pressure transducer. Greater than 10,000 ohms between the ABS module and ground.
19 3603 (RD) brake pressure transducer ground 0 volts, less than 5 ohms between the ABS module and the brake pressure transducer. Greater than 10,000 ohms between the ABS module and ground.
20 3600 (RD/WH) brake pressure transducer signal 0 volts, less than 5 ohms between the ABS module and the brake pressure transducer. Greater than 10,000 ohms between the ABS module and ground.
24 3011 (BK/OG) brake pedal travel sensor ground 0 volts, less than 5 ohms between the ABS module and the brake pedal travel sensor. Greater than 10,000 ohms between the ABS module and ground.
25 1879 (PK/BK) sensor cluster CAN Bus (-) 0 volts, less than 5 ohms between the ABS module and the sensor cluster. Greater than 10,000 ohms between the ABS module and ground.
26 3010 (TN) brake pedal travel sensor voltage 0 volts, less than 5 ohms between the ABS module and the brake pedal travel sensor. Greater than 10,000 ohms between the ABS module and ground.
27 1581 (PK/LB) brake pedal force switch normally open (NO) 0 volts, less than 5 ohms between the ABS module and the active brake booster. Greater than 10,000 ohms between the ABS module and ground.
28 1579 (OG/RD) brake pedal force switch signal 0 volts, less than 5 ohms between the ABS module and the active brake booster. Greater than 10,000 ohms between the ABS module and ground.
29 1878 (WH/BK) sensor cluster CAN Bus (+) 0 volts, less than 5 ohms between the ABS module and the sensor cluster. Greater than 10,000 ohms between the ABS module and ground.
30 1580 (WH/LG) brake pedal force switch normally closed (NC) 0 volts, less than 5 ohms between the ABS module and the active brake booster. Greater than 10,000 ohms between the ABS module and ground.
31 1583 (BN/WH) active brake booster voltage 0 volts, less than 5 ohms between the ABS module and the active brake booster. Greater than 10,000 ohms between the ABS module and ground.
32 493 (BK/PK) HCU valve voltage Greater than 10 volts with the ignition switch in any position.
33 514 (YE/RD) RF active wheel speed sensor voltage
CAUTION: No measurements should be taken with the wheel speed sensor connected. Damage to the wheel speed sensor will result.
0 volts, less than 5 ohms between the ABS module and the wheel speed sensor. Greater than 10,000 ohms between the ABS module and ground.
34 516 (YE/BK) RF active wheel speed sensor ground
CAUTION: No measurements should be taken with the wheel speed sensor connected. Damage to the wheel speed sensor will result.
0 volts, less than 5 ohms between the ABS module and the wheel speed sensor. Greater than 10,000 ohms between the ABS module and ground.
36 518 (LG/RD) LH rear (or axle) active wheel speed sensor voltage
CAUTION: No measurements should be taken with the wheel speed sensor connected. Damage to the wheel speed sensor will result.
0 volts, less than 5 ohms between the ABS module and the wheel speed sensor. Greater than 10,000 ohms between the ABS module and ground.
37 519 (LG/BK) LH rear (or axle) active wheel speed sensor ground
CAUTION: No measurements should be taken with the wheel speed sensor connected. Damage to the wheel speed sensor will result.
0 volts, less than 5 ohms between the ABS module and the wheel speed sensor. Greater than 10,000 ohms between the ABS module and ground.
38 959 (GY) traction control switch input Greater than 10 volts with traction control switch pressed. Less than 5 ohms between the ABS module and the traction control switch.
41 511 (LG) stoplamp switch input 0 volts with the brake pedal released, greater than 10 volts with the brake pedal pressed.
42 524 (PK/BK) RH rear active wheel speed sensor ground
CAUTION: No measurements should be taken with the wheel speed sensor connected. Damage to the wheel speed sensor will result.
0 volts, less than 5 ohms between the ABS module and the wheel speed sensor. Greater than 10,000 ohms between the ABS module and ground.
43 523 (RD/PK) RH rear active wheel speed sensor voltage
CAUTION: No measurements should be taken with the wheel speed sensor connected. Damage to the wheel speed sensor will result.
0 volts, less than 5 ohms between the ABS module and the wheel speed sensor. Greater than 10,000 ohms between the ABS module and ground.
44 810 (RD/LG) driver brake apply signal (to trailer tow relay) 0 volts, less than 5 ohms between the ABS module and the PCM.
45 522 (TN/BK) RH rear active wheel speed sensor ground
CAUTION: No measurements should be taken with the wheel speed sensor connected. Damage to the wheel speed sensor will result.
0 volts, less than 5 ohms between the ABS module and the wheel speed sensor. Greater than 10,000 ohms between the ABS module and ground.
46 521 (TN/OG) LH front active wheel speed sensor voltage
CAUTION: No measurements should be taken with the wheel speed sensor connected. Damage to the wheel speed sensor will result.
0 volts, less than 5 ohms between the ABS module and the wheel speed sensor. Greater than 10,000 ohms between the ABS module and ground.
47 530 (LG/YE) ABS module ground 0 volts, less than 5 ohms between the ABS module and ground.
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