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PUMP SPEED SENSOR
Ananalyzercanbeusedtoobservethewavepatterninordertovisuallycheckthepumpshaftrotation
andabnormalitiesinthesensoroutput.

MeasurementMethod
1.Disconnectthepumpspeedsensorconnectorand
connectthespecialtool(testharness:MD991658)in
between.(Allterminalsshouldbeconnected.)
2.Connect the analyzer probe to terminal No. 1 of the pump
speedsensorconnector(blackclipofspecialtool).
NOTE
Whenmeasuringattheengine-ECUconnector,connect
theanalyzerprobetoterminalNo.51.
Standard Wave Pattern Observationconditions
| Probe select switch |
|---|
| TIME/DIV. |
| VOLTS/DIV. |
| AC - GND - DC |
| Engine r/min |
| Pump speed sensor |
|---|
| Set according to the probe. |
| About 10 msec |
| About 0.5 V |
| DC |
| Idle speed |


