19
Cab-mount ECU: Looking into
wire harness connector
Frame-mount ECU: Looking into wire
harness connector
Connector Pin Wheel Speed Sensor Location
X1 10 Right Drive Axle (+)
18 Way 11 Right Drive Axle (-)
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 (-)
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 (-)
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 (-)
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 (-)
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
Sensor to voltage or ground Open Circuit (no continuity)
Sensor output voltage >0.25 of VAC sensor output at ~ 0.5 revs/sec.
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.
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