BENDIX M-21-M-22 ANTILOCK MOD ASSY Spezifikationen PDF herunterladen (Seite 25)

3 Diagnostics, Troubleshooting and Testing

Meritor WABCO Maintenance Manual MM-0112 (Revised 05-13)

Testing

Wheel Speed Sensor Testing

Sensor Adjustment

앫 Push the sensor in until it contacts the tooth wheel.

앫 Do not pry or push sensors with sharp objects.

앫 Sensors will self-adjust during wheel rotation.

Electrical Checks

앫 Check wheel speed sensor by itself for resistance.

앫 Check ECU harness and sensor together for resistance.

Figure 3.13 and Figure 3.14.

앫 Verify no change in resistance or open circuit between sensor by

itself and through harness.

앫 Check harness by itself for any shorts to battery and shorts to

ground.

앫 Measurements should read as follows:

NOTE: Sensor resistance can change with temperature. All

readings should be taken at the same time and before vehicle is

driven.

Figure 3.13

Location Measurement

Between sensor leads 900-2000 ohm

At ECU harness pins with sensor

connected

Same as above, no more than

1 ohm difference

ECU harness by itself for DC

voltage or ground

No continuity

Sensor output voltage At least 0.2 volt AC at 30 rpm

Figure 3.13

X1X4

4007203a

CAB MOUNT ECU’S:

LOOKING INTO WIRE HARNESS CONNECTOR

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BENDIX M-21-M-22 ANTILOCK MOD ASSY Spezifikationen Seite 25