Checking Signal From Rotation Sensor [EL22]

Checking Signal From Rotation Sensor





- Ignition off.
- Connect combination relay 4-pin and 15-pin connector.
- Disconnect control module.

First connect a temporary lead on test box between #1 and #34.
Then connect another temporary lead between #1 and #15 on test box.
Connect a voltmeter between #31 and #49 on test box.

- Ignition on.
- Pump motor should start and voltmeter should read at least 350 mV AC at a frequency of at least 130 Hz. Maximum cut-in time approx. 20 seconds.
- Ignition off.
- Remove the temporary leads.

If reading is OK:
- DTC was due to poor contact in combination relay 4-pin and 15-pin connector. Check connectors for loose contact as per HA5 and contact resistance and oxidation as per HA6. Checking Leads and Connections [HA]

If reading is incorrect:
- Try another hydraulic unit as per NE. Hydraulic unit, replacement. Service and Repair