Speed Sensor Repair Tests:
1.Take all measurements at ECU harness connector pins in order to check wire harness and sensor. Probe the connector carefully so that the terminals are not damaged.
2.Wheel speed sensor measurements should read:
Location | Measurement |
Sensor | 1500 - 2500 Ohms |
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Sensor to voltage or ground | Open Circuit (no continuity) |
Sensor output voltage | >0.25 of VAC sensor output at ~ 0.5 revs/sec. |
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3.Clear DTC after issue is corrected. The sensor DTC will remain until the power is cycled to the ABS ECU and vehicle is driven above 15 MPH or DTC was cleared using either the diagnostic blink code switch or diagnostic tool.
Cab-mount ECU: Looking into wire harness connector
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Connector | Pin | Wheel Speed Sensor Location |
X1 | 10 | Right Drive Axle (+) |
18 Way | 11 | Right Drive Axle |
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| 5 | Left Steer Axle (+) |
X2 | 8 | Left Steer Axle |
18 Way | 11 | Right Steer Axle (+) |
| 14 | Right Steer Axle |
| 15 | Left Drive Axle (+) |
| 18 | Left Drive Axle |
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X3 | 11 | Left Additional Axle (+) |
15 Way (if Premium | 14 | Left Additional Axle |
ECU is configured | 12 | Right Additional Axle (+) |
for 6 sensors) | 15 | Right Additional Axle |
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Frame-mount ECU: Looking into wire harness connector
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Connector | Pin | Wheel Speed Sensor Location |
| 3 | Left Steer Axle (+) |
X1 | 7 | Left Steer Axle |
15 Way | 4 | Right Steer Axle (+) |
| 8 | Right Steer Axle |
| 1 | Left Drive Axle (+) |
X2 | 2 | Left Drive Axle |
18 Way | 3 | Right Drive Axle (+) |
| 4 | Right Drive Axle |
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X3 | 3 | Left Additional Axle (+) |
18 Way (if Premium | 4 | Left Additional Axle |
ECU is configured | 5 | Right Additional Axle (+) |
for 6 sensors) | 6 | Right Additional Axle |
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