28
Cab-mount ECU: Looking into
wire harness connector
X 4
Connector
Pin
Wheel Speed Sensor
Location
X1
18 Way
10
Right Drive Axle (+)
11
Right Drive Axle (-)
X2
18 Way
5
Left Steer Axle (+)
8
Left Steer Axle (-)
11
Right Steer Axle (+)
14
Right Steer Axle (-)
15
Left Drive Axle (+)
18
Left Drive Axle (-)
X3
15 Way
(if ECU is
configured for
6 sensors)
11
Left Additional Axle (+)
14
Left Additional Axle (-)
12
Right Additional Axle (+)
15
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.
