Checking Power Supply to Valves [EM11]

Checking Power Supply To Valves





- Ignition off.
- Connect hydraulic unit connector C/ED.
- Connect combination relay 15-pin connector.
- Disconnect control module.

Connect a temporary lead between #1 and #34 on test box.

Connect a voltmeter between #1 and #3 on test box.

- Ignition on.

When the ignition is switched on, relay should trip.

Voltmeter should read approx. battery voltage.

- Ignition off.
- Remove the temporary lead.

If reading is OK:
- DTC was due to poor contact in control module connector, hydraulic unit connector C/ED or combination relays 15-pin connector. Check connectors for contact resistance and oxidation as per HA6. Contact Resistance and Oxidation [HA6]

If reading is incorrect:
- Check 151 supply to combination relay EM12. Checking 15I Supply To combination Relay [EM12]